Diaphragm-Seal type

Pressure Gauge
OUTLINE
This is a Diaphragm seal type pressure instrument in which
liquid as a pressure transmitting media is filled between a
diaphragm seal parts and bourdon tube as an element.
In this catalogue, General type of Indicator, Pressure gauge with
Electric contact, Pressure Switch, Differential Pressure Guage,
Differential Pressure Gauge with contact and Differential
Pressure Switch are introduced.
Diaphragm and the lower flange as wetted parts can be selected
according to applications, so these instruments are appropriate
for the measurement of highly corrosive fluid, high viscosity
fluid, fluid which contains solid materials or fluid to be easily
solidified

FEATURES
• Because the high-corrosion resistant diaphragm can be used
at the pressure receiving portion, this pressure gauge can be
used for the measurement of highly corrosive measuring fluid.
• For a pressure gauge in which a diaphragm is attached by
welding, the surface of a diaphram can be easily cleaned (by
loosening the casing bolts.).
• A zero-adjusting pointer has been applied, so calibration
required due to errors of temperature, elevation, etc. can be
easily preformed.
• With the application of a welded diaphragm the application for
leakage of filled liquid has been decreased. (diaphragms made
of some materials are excluded.)

Pressure gauge Differential Differential

General pressure gauge with electric contact Pressure switch pressure gauge pressure switch
Classification

General type, Differential Differential

weather-proof Glycerin Pressure switch pressure gauge pressure switch
type filled type Micro switch Electronic type (Explosion-proof pressure switch) (Differential switch Explosion-proof differential
(conforming to JIS) with electric contact) pressure switch

AC, AE, AG, CB13, CB33,

GV42 JM33 JD13 CD30 CQ30 DG93 CL71, CD71
BC, BE, BG CD75
Temperature
Measured

range
fluid

-30 ~ 230g -5 ~ 100g -30 ~ 230g -5 ~ 100g -30 ~ 230g -30 ~ 230g -30 ~ 100g -5 ~ 100g -5 ~ 100g
Appearance

Direct type Direct type Direct type Direct type Direct type
Type

Remote type Remote type Remote type Remote type Remote type Remote type Remote type Remote type Remote type
(option) (option) (option) (option) (option)
pressure gauge

0 ~ 0.05 MPa 0 ~ 0.1MPa 0 ~ 0.1MPa 0 ~ 0.2 MPa 0 ~ 0.2 MPa 0 ~ 0.2 MPa
Positive
Pressure range

f f f f f f
0 ~ 15 MPa 0 ~ 15 MPa 0 ~ 5 MPa 0 ~ 15 MPa 0 ~ 15 MPa 0 ~ 15 MPa 0.04 ~ 0.4 MPa 0 ~ 0.05 MPa 0.01 ~ 0.05 MPa
f f f
Vacuum gauge/

pressure gauge

-0.1 ~ 0.2 MPa 1 ~ 10 MPa 0 ~ 0.5 MPa 0.2 ~ 1MPa

compound

-0.1 ~ 0 MPa -0.1 ~ 0 MPa -0.1 ~ 0 MPa -0.1 ~ 0.1MPa -0.1 ~ 0 MPa
f f f f f f
-0.1 ~ 2 MPa -0.1 ~ 2 MPa -0.1 ~ 2 MPa -0.1 ~ 2 MPa -0.1 ~ 2 MPa -0.1 ~ 2 MPa
Diaphragm

f40, f60, f40, f60, f60, f80, f40, f60, f40, f60, f40, f60,
dia.

f60, f110 f110 f110

f80, f110 f80, f110 f110 f80 f80, f110 f80, f110

* In addition to these, pressure gauges with electric contacts or other combinations, for example, with electronic pressure transmitters or pneumatic
pressure/differential pressure transmitters are available. Please contact the nearest NAGANO KEIKI office.

2
 CONSTRUCTION

Direct type :

Bourdon tube

Pointer

Liquid is filled between the diaphragm and the Bourdon tube.

Indicator section The pressure which is received by the diaphragm is transmitted
to the Bourdon tube by the filled liquid as pressure transmitting
medium, and the Bourdon tube is deformed under the pressure
Filled liquid to rotate the pointer.
Clamping bolt

Upper flange

Sensor section Diaphragm

Lower flange
Gasket

[Screw type]

Remote type :

Indicator section Indicator section and sensor section are connected by a capillary tube
in which liquid is filled.

Capillary tube
Length depends on
diaphragm diameter

Sensor section

* For diaphragm-seal type pressure gauges, a "bellows type" which is not filled liquid (unfilled type) is also available.
This type is especially suited to the food processing industry or other applications where no droplets of filled liquid are allowed to mix
in with the object fluid.

3
SENSOR SECTION 1 Mounting

[Screw Type] Model 100 • Screw Type

(Model : SC10)

[Flange type] Model 200 • Flange Type Model 300 • Flange Type

(Model : SC23) (Model : SC33)

Special models
Model 410 • Screw type with middle flange

(Model : SC40) Model 210 • Non-metal flange type

Cleaning hole
(Model : SC40)

Application: When fluid is stuck on the diaphragm, the inside For non-metal flange type
of the flange can be cleaned through the cleaning hole Flange material: Rigid polyvinyl chloride, polypropylene
without removing the lower flange. Flange face: FF (flat face)
Flange manufacturing range: JIS10K15A ~ 40A
ANSI 150LB3/4B ~ 1 1/2B
(Diaphragm diameter: onlyf60 andf80)
Maximum pressure: f60…1MPa or less
f80…0.4MPa or less
Working temperature: 0 to 60g

Model 220 • with steam jacket Model 500 • Middle flange type

(Model : SJ23) (Model : SC53)

Cleaning hole
(Model : SS53)

Application: In order to prevent freezing or to increase viscosity, Application: When fluid is stuck on the diaphragm, the inside of
steam is let through the jacket to warm the fluid flange can be cleaned through the cleaning hole
flowing in the inner pipe. without removing the lower flange.

4
SENSOR SECTION 2

Connecting screw/flange:
Flange type (SC23 • 33)
Screw type (SC10)
Nominal pressure Nominal size
G3/8B (PF) JIS10K, JIS16K, 10A, 15A, 20A,
G1/2B (PF) JIS20K, JIS30K, 25A, 32A, 40A,
R3/8 (PT) JIS40K, JIS63K, 50A, 65A, 80A,
R1/2 (PT) ANSI150, ANSI300, 100A
3/8NPT ANSI600, ANSI900, 3/8", 1/2", 3/4",
1/2NPT ANSI1500 1", 1 1/4", 1 1/2",
2", 2 1/2", 3",
3 1/2", 4"

Material:
Standard type (Model: SC33)
Upper Lower flange Clamping
Diaphragm Gasket
flange Screw type Flange type bolt
S25C SUS316, S25C, S25C, Less than 200g SUS305
(Ni plated) SUS316L, SUS316, SUS316, PTFE
Monel, SUS316L, SUS316L, 200g or higher
SUS316 TP35C (Titanium), Monel, S25C +Lining, Asbestos
Hastelloy B, TB35C (Titanium), (Only when
Glass, PTFE, Neoprene,
temperature is
Hastelloy C-276, Hastelloy B, crude rubber
specified)
TaP (Tantalum), Hastelloy C-276, S25C +FEP coating,
Nickel, NAS305 (Carpenter 20) SUS316 +Lining,
SUS316 PTFE, Neoprene,
*1
+Neoprene lining, Crude rubber
SUS316 SUS316 +FEP coating,
*1
+ FEP lining, Rigid polyvinyl chloride
2
SUS316 (PVC),*
*1 *2
+FEP coating Polypropylene

High withstand pressure type (Model: HH33 • HD33)

Upper Lower flange Clamping
Diaphragm Gasket
flange Screw type Flange type bolt
S25C SUS316, S25C S25C Less than 200g SUS305
(Ni plated) SUS316L, (HD33 only), (HD33 only), PTFE
(HD33 only) SUS316 SUS316, SUS316, 200g or higher
*1 Asbestos
SUS316 +FEP lining, SUS316L SUS316L (temperature is
(HD33 only) SUS316 (HD33 only), (HD33 only), specified)
*1
+FEP coating

High withstand pressure welding end type (Model: HE33)

Upper Lower flange
Diaphragm
flange Screw type Flange type
SUS316 SUS316, SUS316, SUS316,
SUS316L SUS316L SUS316L SUS316L
Upper flange
comes into
contact with
liquid

*1 When diaphragm material is FEP or Neoprene, the maximum working temperature of sensor section is 100g.
*2 When the material of the lower flange is rigid polyvinyl chloride (PVC), polypropylene or other resin, a problem may arise involving heat
resistance, weather resistance, strength or durability. Please use metal flange as much as possible.
(Rigid polyvinyl chloride (PVC) flanges are manufactured by bonding, not by machining.)

Note 1: Can be used as a vacuum gauge of specified accuracy when pressure is 2.7 kPa abs. or higher.
Note 2: When the product is used to measure high-pressure gas, NAGANO KEIKI can provide a strength calculation report conforming to the High-
Pressure Gas Safety Act. Request it to us when necessary.
Note 3: When the material of diaphragm is monel, nickel or coating, the flange may not be welded.
In case of FEP, SUS316 is welded on the upper flange and then FEP is lined on the connected side.
However, for vacuum or compound pressure gauges, please specify "FEP coating."

5
 Diaphragm-Seal Type
Pressure Gauges
FABRICATION SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Direct type, Remote type (option)

Mounting method :
Screw type, Flange type

Accuracy :
±1.5%F.S./20g±10g

JIS B7505-1994-conforming (Bourdon tube pressure gauges)

diaphragm-seal type pressure gauges are also available.
However, their accuracy is ±1.6% F.S. / 20g±10g.

INDICATOR SECTION
Pressure indicator : Material of main parts :
General type pressure gauge (Model : A313 ) Socket YBsC3
Weather-proof type pressure gauge Bourdon tube C6872T, SUS316
(Equivalent to drip-proof II type) (Model : B313 )
Case material and finish :
Glycerin filled type (Model : GV42)
Aluminum alloy, Bakelite (black)
Dial size : (Glycerin filled type SUS304 • natural)
f75, f100, f150
Construction :
Mounting : Indoor type, weather-proof type,
Stem (Type A, Type B) (Equivalent to drip-proof II type)

* For details, see the catalog for the desired pressure gauge.

SENSOR SECTION • FILLED LIQUID

Diaphragm diameter : Filled Liquid :
f40, f60, f80, f110 Silicone oil
* Determined by pressure range and the temperature -30 ~ 230g
of measured fluid. Note: For vacuum and compound pressure gauges, only those for -30
to 100g temperature range are available.
* Pressure gauges filled with Daifloil, glycerin water solution or ethylene
Material of diaphragm : glycol are also available. For details, please inquire at the nearest
For the material of upper/lower flange and diaphragm, NAGANO KEIKI office. (Note that working temperature range
changes according to the filled liquid type and that using as a vacuum
see the page for SENSING PART 2. or compound pressure gauge is possible only when low-temperature
silicone oil is filled.)

Maximum length of capillary tube :

For remote type (option)
2m ~ 10m (depends on pressure range)

6
 Diaphragm-Seal Type Pressure Gauges

MANUFACTURING SPECIFICATION

Relationship between pressure range, temperature range and diaphragm diameter : (Maximum length of capillary tube:
For remote type (option))

Filled liquid Low-temperature silicone oil Middle-temperature silicone oil

Temperature range of measured fluid Less than -30 to -5g -5 to 100g * Higher than 100 to 230g
Diaphragm Maximum Diaphragm Maximum Diaphragm Maximum
Pressure range MPa diameter
length of
diameter
length of
diameter
length of
capillary tube capillary tube capillary tube
0~ 0.05 (GV42 is not available) f110 6m f110 6m f110 6m
~ 0.07 (GV42 is not available) f110 6m f110 6m f110 6m
~ 0.1 f110 6m f80 6m f110 6m
~ 0.16 f110 6m f80 6m f110 6m
~ 0.2 f110 6m f80 6m f110 6m
~ 0.25 f80 4m f80 6m f80 4m
~ 0.3 f80 4m f80 6m f80 4m
~ 0.4 f80 6m f80 8m f80 6m
~ 0.6 f80 6m f60 6m f80 6m
~ 1 f80 6m f60 10m f80 6m
~ 1.5 f60 2m f60 10m f60 2m
~ 1.6 f60 2m f60 10m f60 2m
~ 2 f60 2m f60 10m f60 2m
~ 2.5 f60 2m f60 10m f60 2m
~ 3.5 f60 2m f60 10m f60 2m
~ 4 f60 2m f60 10m f60 2m
~ 5 f60 2m f60 10m f60 2m
~ 6 f40 2m f40 2m f40 2m
~ 7 f40 2m f40 2m f40 2m
~10 f40 2m f40 2m f40 2m
~15 f40 2m f40 2m f40 2m
~16 f40 2m f40 2m f40 2m
f110 6m
-0.1~0MPa — — f80 3m — —
~0.05 (GV42 is not available) — — f110 6m — —
~0.07 (GV42 is not available) — — f110 6m — —
~0.1 — — f80 6m — —
~0.16 — — f80 6m — —
~0.2 — — f80 6m — —
~0.25 — — f80 6m — —
~0.3 — — f80 6m — —
~0.4 — — f80 8m — —
~0.6 — — f60 6m — —
~1 — — f60 10m — —
~1.5 — — f60 10m — —
~1.6 — — f60 10m — —
~2 — — f60 10m — —
~2.5 — — f60 10m — —
* For glycerin filled type (GV42), only those for the temperature range of -5 to100g are available.
* Specify the length of capillary tube by the meter.
Shading means the pressure ranges conforming to JIS B7505-1994.

Relationship between the size of flange/screw and the diameter of diaphragm :

Mounting method Flange type Screw type
Diaphragm diameter f40 f60 f80 f110 f40, f60, f80, f110
Mounting Model 200 Model 300 Model 200 Model 300 Model 200 Model 300 Model 200 Model 300 Model 100 (SC13)
Nominal size (SC23) (SC33) (SC23) (SC33) (SC23) (SC33) (SC23) (SC33)
10A (3/8″) o — o — o — o —
15A (1/2″) o — o — o — o —
20A (3/4″) o — o — o — o — G3/8B
25A (1″) — o o — o — o — G1/2B
32A (1 1/4″) — o o — o — o — R3/8
40A (1 1/2″) — o — o o — o — R1/2
50A (2″) — o — o — o o — 1/2NPT
65A (2 1/2″) — — — o — o o — 3/8NPT
80A (3″) — — — o — o — o
100A (4″) — — — o — o — o

7
Diaphragm-Seal Type Pressure Gauges

DIMENSIONS

Standard type (Model : SC 3 3 )

[Screw type]
Model 100 • Screw
Glycerin filled type
General type • Weather-proof type pressure gauge
3-f5.5 mounting hole 3-f5.5 mounting hole
Blowout disk Wall mounting type (type B) Wall mounting type (type B)
when remote type is specified when remote type is specified

20
10

(H)
(H)

fD1
fD1

e 16 (28)
16 (28)

L$M Hex.

L$M Hex.
Connecting screw size
e

d f d0
d e d0 L$M
d fd0 G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
SC10-3 3 3 36$41.6 SC10- 3 3 3
G1B (PF) 28 20

[Flange type] Model 200 • Flange Model 300 • Flange

(H)

fD1
(28)

(H)
Connecting flange
fD1
For dimensions, see JPI
ANSI
the standard dimensions
Connecting flange

20
of JIS or JPI ANSI flange.
50

For dimensions, see JPI f32

ANSI
the standard dimensions

t
of JIS or JPI ANSI flange.
t

f
f

fg fg
fD fD

SC2 3 - 3 3 3 SC3 3 - 3 3 3

Dimensions of indicator section Glycerin filled type

(general type, weather-proof type) Dimensions of indicator section

Case Type No. (indicator section) Case Type No. (indicator section)
Size H Size H
material Direct type Remote type material Direct type Remote type
AC10-13 3 AC10-23 3
75 56 SUS304 100 72 GV42-13 3 GV42-23 3
BC10-13 3 BC10-23 3
AE10-13 3 AE10-23 3
Metal 100 94 Outside diameter of sensor section (fD1)
BE10-13 3 BE10-23 3
AG10-13 3 AG10-23 3 Diaphragm dia. fD 1
150 109 f40 f70
BG10-13 3 BG10-23 3
75 56 BC12-13 3 BC12-23 3 f60 f90
Plastic 100 94 BE12-13 3 BE12-23 3 f80 f110
150 109 BG12-13 3 BG12-23 3 f110 f140

* For the dimensions of remote type (option), please inquire at the nearest
NAGANO KEIKI office.
* For detailed outside dimensions of indicator section, see the catalog.

8
 Diaphragm-seal type pressure
gauges with electric contact
MANUFACTURING SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Direct type, Remote type (option)

Mounting method :
Screw type Flange type

Accuracy :
±1.5%F.S./20g±10g

INDICATOR SECTION
Pressure indicator : Number of contacts :
Pressure gauge with micro switch (Model : JM3 3 ) 1 or 2
Pressure gauge with electronic contact (Model : JD13 ) Setting method :
Size : Internal adjustment type
f100, f150 Case material and finish :
Mounting : ADC12 or AC7A
• Black or two-tone (blue/gray)
Stem (Type A or type B), Flush type
Construction :
Material of main parts :
Equivalent to drip-proof II type or drip-proof type (IP43)
Socket YBsC3, SUS316 or SCS14
Bourdon tube C6872T, SUS316 * For details, see the catalog for the desired pressure gauge
with switch.

SENSOR SECTION • FILLED LIQUID

Diaphragm diameter : Filled liquid :
Pressure gauge with micro switch Silicone oil
f60, f80, f110 -30 to 230g
Pressure gauge with electronic contact Note : For vacuum and compound pressure gauges, only those for -30
to 100g temperature range are available.
f40, f60, f80
* Pressure gauges filled with Daifloil, glycerin water solution or ethylene
* Determined by pressure range and the temperature glycol are also available. For details, please inquire at the nearest
of measured fluid. NAGANO KEIKI office. (Note that working temperature range
changes according to filled liquid and that using as a vacuum or
compound pressure gauge is possible only when low-temperature
Material of diaphragm : silicone oil is filled.)
For the material of upper/lower flange and diaphragm,
Maximum length of capillary tube :
see the page for SENSOR SECTION 2.
For remote type (option)
2m ~ 15m (depends on pressure range)

9
Diaphragm-seal type pressure gauges with electric contact

MANUFACTURING SPECIFICATION

Relationship between pressure range, temperature range and diaphragm diameter : (Maximum length of capillary tube :
For remote type (option))
Filled liquid Low-temperature silicone oil Middle-temperature silicone oil
Temperature
range of Less than -30 to -5g -5 to 100g Higher than 100 to 230g
measured fluid
Number of 1 2 1 2
contacts 1 2
Indicator
(model) JM3 3 JM3 3 JM3 3 JM3 3 JD3 3 JM3 3 JM3 3
Maximum Maximum Maximum Maximum Maximum Maximum Maximum
Pressure range Diaphragm length of Diaphragm length of Diaphragm length of Diaphragm length of Diaphragm length of Diaphragm length of Diaphragm length of
MPa diameter capillary tube: diameter capillary tube: diameter capillary tube: diameter capillary tube: diameter capillary tube: diameter capillary tube: diameter capillary tube:
0~ 0.1 f110 6m f110 6m f110 6m f110 6m — — f110 6m f110 6m
~ 0.2 f110 6m f110 6m f80 4m f110 6m f80 6m f110 6m f110 6m
~ 0.3 f110 6m f110 6m f80 4m f80 4m f80 6m f110 6m f110 6m
~ 0.4 f80 2m f110 6m f80 8m f80 8m f80 6m f80 2m f110 2m
~ 0.6 f80 2m f80 2m f80 8m f80 8m f60 6m f80 2m f80 2m
~ 1 f80 2m f80 2m f80 8m f80 15m f60 10m f80 2m f80 2m
~ 1.5 f80 2m f80 2m f60 6m f80 15m f60 10m f80 2m f80 2m
~ 2 f80 2m f80 2m f60 6m f60 6m f60 10m f80 2m f80 2m
~ 2.5 f60 2m f80 2m f60 6m f60 6m f60 10m f60 2m f80 2m
~ 3.5 f60 2m f60 2m f60 6m f60 6m f60 10m f60 2m f60 2m
~ 5 f60 2m f60 2m f60 6m f60 6m f60 10m f60 2m f60 2m
~ 7 — — — — — — — — f40 2m — — — —
~10 — — — — — — — — f40 2m — — — —
~15 — — — — — — — — f40 2m — — — —
—0.1~0MPa — — — — f110 3m f110 3m — — — — — —
~0.1 — — — — f110 6m f110 6m f80 6m — — — —
~0.2 — — — — f80 4m f110 4m f80 6m — — — —
~0.3 — — — — f80 4m f80 4m f80 6m — — — —
~0.4 — — — — f80 8m f80 8m f80 6m — — — —
~0.6 — — — — f80 8m f80 8m f60 6m — — — —
~1 — — — — f80 8m f80 15m f60 10m — — — —
~1.5 — — — — f60 6m f80 15m f60 10m — — — —
~2 — — — — 6m f60 6m 10m f60
— — — f60
—
* For pressure gauges with electronic contact (JD13), only 2-contact type for -5g~100g temperature range is available.
* Specify the length of capillary tube by the meter.

Relationship between the size of flange/screw and the diameter of diaphragm :

Mounting method Flange type Screw type

Diaphragm diameter f40 f60 f80 f110 f40, f60, f80, f110
Model Model 200 Model 300 Model 200 Model 300 Model 200 Model 300 Model 200 Model 300
Model 100 (SC13)
Nominal size (SC23) (SC33) (SC23) (SC33) (SC23) (SC33) (SC23) (SC33)

10A (3/8″) o — o — o — o —
15A (1/2″) o — o — o — o —
20A (3/4″) o — o — o — o — G3/8B
25A (1″) — o o — o — o — G1/2B
32A (1 1/4″) — o o — o — o — R3/8
40A (1 1/2″) — o — o o — o — R1/2
50A (2″) — o — o — o o — 1/2NPT
65A (2 1/2″) — — — o — o o — 3/8NPT
80A (3″) — — — o — o — o
100A (4″) — — — o — o — o

10
 Diaphragm-seal type pressure gauges with electric contact

OUTSIDE DIMENSIONS

Standard type (Model : SC 3 3 )

[Screw type]
Model 100 • Screw
Pressure gauge with electronic contact
Pressure gauge with micro switch
3-f5.5 mounting hole (104) Mounting plate
P.C.D.115
3-f5.5 mounting hole
P.C.D.115 (116.5)

NAGANO KEIKI
(H)

fD1

(H)
28

Gland : JIS20b
fD1
Setting adjusting screw
16

L$MHex.

28
Gland : JIS20b
e

16
L$MHex.
d fd0 Diaphragm Connecting screw size

e
d e d0 L$M
G1/2B (PF) 20 10 d fd0 Diaphragm
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
SC10-3 3 3 36$41.6 SC10- 3 3 3
G1B (PF) 28 20

[Flange type] Model 200 • Flange Model 300 • Flange

(H)

fD1
(28)

(H)
Connecting flange fD1
JPI
For dimensions, see ANSI
Connecting flange the standard dimensions

20
50

JPI f32 of JIS, JPI or ANSI flange.

For dimensions, see ANSI
the standard dimensions

t
of JIS, JPI or ANSI flange.
t

f
f

fg fg
fD fD

SC2 3 - 3 3 3 SC33 - 3 3 3

Dimensions of indicator section Outside diameter of sensor section (fD1)

Case Diaphragm diameter fD1
Size H Type No. (indicator section)
material f40 f70
JM11-3 3 3 f60 f90
100 74
JD10-2 3 3 f80 f110
Metal
f110 f140
150 107 JM21-3 3 3

* For the dimensions of remote type (option), please inquire at the nearest
NAGANO KEIKI office.
* For detailed outside dimensions of indicator section, see the catalog.

11
 Diaphragm-Seal Type Pressure Switch
(CQ30/CD30: Bourdon tube type)

MANUFACTURING SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Remote type, Direct type (option)

Mounting method :
Screw type, Flange type

Accuracy :
±1.0%F.S./Room temperature (constant)

Working temperature range :

CQ30 -20 to 60g
CD30 -5 to 40g

INDICATOR SECTION
Pressure switch : Case material and finish :
Pressure switch (Model : CQ30) ADC12
Explosion-proof pressure switch (Model : CD30) • Crystalline gray paint or blue-gray two-tone acid-proof paint

Mounting : Construction :
Panel mounting, 2B pipe mounting Waterproof, drip-proof or outdoor type

Material of main parts :

* For details, see the catalog for the desired pressure switch.
Socket SCS14
Bourdon tube SUS316

SENSOR SECTION & FILLED LIQUID

Diaphragm diameter : Filled liquid :
f40, f60, f80, f110 Silicone oil
* Determined by pressure range and the temperature -30 to 230g
of measured fluid. Note : For vacuum and compound range, only those for -30 to 100g
temperature range are available.
* Filled with Daifloil, glycerin water solution or ethylene
Material of diaphragm : glycol are also available. For details, please inquire at the nearest
For the material of upper/lower flange and diaphragm, NAGANO KEIKI office. (Note that working temperature range
changes according to the filled liquid.)
see the page for SENSOR SECTION 2.
Maximum length of capiliary tube :
For remote type
2m ~ 10m (depends on pressure range)

12
 Diaphragm-Seal Type Pressure Switch (Bourdon tube pressure gauge)

MANUFACTURING SPECIFICATION
Relationship between diaphragm diameter and withstand pressure or temperature coefficient (for reference only)
Withstand Temperature coefficient Temperature coefficient Temperature coefficient
Diaphragm pressure of of switch part of capillary tube part of welled parts
diameter diaphragm part
(MPa) (%F.S./g) (Pa/g/m) (Pa/g)
f110 0.5 -0.2 15 50
f80 1.5 -0.2 30 100
f60 5 -0.1 150 250
f40 15 -0.1 1500 5000

* When low-strength material such as titanium is used or when the temperature of the welled parts is high, the withstand
pressure of the diaphragm part may be lower than these figures.
* Whichever is lower of the withstand pressure of pressure switch part (1.5 times the pressure range) and that of diaphragm
part becomes the withstand pressure of the entire pressure gauge.

Relationship between pressure range, temperature range and diaphragm diameter

(figures of maximum capillary length are for remote type)
Temperature range
of measured fluid Less than -30 to -5g -5 to 100g Higher than 100 to 230g
Diaphragm Maximum
length of Diaphragm Maximum Diaphragm Maximum
length of length of
Pressure range MPa
diameter capillary tube diameter capillary tube diameter capillary tube
0 ~ 0.2 f110 6m f80 6m f110 6m
~ 0.4 f80 6m f80 8m * f80 6m
~ 0.6 f80 6m f60 6m f80 6m
~ 1 f80 6m f60 10m f80 6m
~ 1.5 f60 2m f60 10m f60 2m
~ 2 f60 2m f60 10m f60 2m
~ 2.5 f60 2m f60 10m f60 2m
~ 3.5 f60 2m f60 10m f60 2m
~ 5 f60 2m f60 10m f60 2m
~ 7 f40 2m f40 2m f40 2m
~10 f40 2m f40 2m f40 2m
~15 f40 2m f40 2m f40 2m
-0.1~ 0 f110 6m
— — — —
(Only CD30 is available) f80 3m
~ 0.2 — — f80 6m — —
~ 0.4 — — f80 8m * — —
~ 0.6 — — f60 6m — —
~1 — — f60 10m — —
~ 1.5 — — f60 10m — —
~2 — — f60 10m — —

* 6 m for CQ30.
* Specify the length of capillary tube by the meter.

Relationship between the size of flange/screw and the diameter of diaphragm.

Mounting method Flange type Screw type
Diaphragm diameter f40 f60 f80 f110 f40, f60, f80, f110
Mounting Model 200 Model 300 Model 200 Model 300 Model 200 Model 300 Model 200 Model 300 Model 100 (SC13)
Nominal size (SC23) (SC33) (SC23) (SC33) (SC23) (SC33) (SC23) (SC33)

10A (3/8″) o — o — o — o —
15A (1/2″) o — o — o — o —
20A (3/4″) o — o — o — o — G3/8B
25A (1″) — o o — o — o — G1/2B
32A (1 1/4″) — o o — o — o — R3/8
40A (1 1/2″) — o — o o — o — R1/2
50A (2″) — o — o — o o — 1/2NPT
65A (2 1/2″) — — — o — o o — 3/8NPT
80A (3″) — — — o — o — o
100A (4″) — — — o — o — o

13
Diaphragm-Seal Type Pressure Switch (Bourdon tube type)

OUTSIDE DIMENSIONS

Standard type (Model : SC 3 3 )

[Screw type] Model 100 • Screw

CQ30 Pressure indicator CD30 Explosion-proof pressure switch

126 5 119
80 f120
Terminal box

132
131
146

52
78
105
Conduit
type
Conduit gland
Flame-proof
39 35 packing type
fD1
fD1
e 16 (28)

e 16 (28)
L$MHex. Connecting screw size
L$MHex.
d e d0 L$M
d fd0 G1/2B (PF) 20 10
24$27.7 d fd0
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
SC10- 3 3 3 G1B (PF) 28 20 SC10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

fD1
(28)

Connecting flange fD1

For dimensions, see JPI
Connecting flange the standard dimensions ANSI
20
of JIS, JPI or ANSI flange.
(50)

For dimensions, see JPI f32

the standard dimensions ANSI
t

of JIS, JPI or ANSI flange.

f
t
f

fg fg
fD fD

SC2 3 - 3 3 3 SC3 3 - 3 3 3

Dimensions of indicator section Outside diameter of sensor section (fD1)

Type No. Diaphragm diameter fD 1

(indicator section) Mounting f40 f70
f60 f90
CQ30- 3 3 3 Panel mounting
f80 f110
Panel mounting f110 f140
CD30- 3 3 3
2B pipe mounting
* For the dimensions of CQ30 direct type (option), please inquire at the nearest NAGANO KEIKI office.
* For detailed outside dimensions of indicator section, see the catalog.

14
 Diaphragm-Seal Type Pressure Switch
(CB13 • 33, CD75 Bellows type for low- and middle-pressure ranges)

MANUFACTURING SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Remote type

Mounting method :
Screw type, Flange type

Accuracy :
±0.5%F.S./Room temperature (constant)

Response speed :
Within 15 seconds

Working temperature range :

-5 to 40g

INDICATOR SECTION
Pressure switch : Number of contacts :
Pressure switch (Model : CB13 • 33) 1 or 2
Explosion-proof pressure switch (Model : CD75) Setting method :
Mounting : Internal adjustment type
Panel mounting, 2B pipe mounting Explosion-proof pressure switch :
Material of main parts : ADC12 or AC7A
• Crystalline gray paint or blue-gray two-tone paint.
Socket SUS316
Bellows SUS316L Construction :
Drip-proof or outdoor type

* For details, see the catalog for the desired pressure gauge
with switch.

SENSOR SECTION • FILLED LIQUID

Diaphragm diameter : Filled liquid :
f60, f110 Silicone oil
* Determined by pressure range and the temperature of -30 to 100g
measured fluid.
Maximum length of capillary tube :
Material of diaphragm : 2m to 8m (depends on pressure range)
For the material of upper/lower flange and diaphragm,
see the page for SENSOR SECTION 2.

15
Diaphragm-Seal Type Pressure Switch (Bellows type)

MANUFACTURING SPECIFICATION
Pressure range • Diaphragm diameter • Relationship between diaphragm diameter and withstand pressure
and temperatue coefficient (for reference only) :
Withstand * Maximum Ambient temperature Temperature
Pressure coefficient of pressure
Diaphragm pressure of coefficient of
range diaphragm part
langth of switch part (including
wet part
diameter capillary tube capillary tube)
MPa (MPa) (%max. P./g) (Pa/g)
0.04 ~ 0.4 f110 3 2m -0.1
0.06 ~ 0.6 f110 3 3m -0.1
0.1 ~ 1 f110 3 8m -0.1
-50
0.15 ~ 1.5 f110 3 8m -0.07
0.2 ~ 2 f110 3 8m -0.07
0.3 ~ 3 f110 3 8m -0.07
0.5 ~ 5 f60 15 5m -0.07
0.7 ~ 7 f60 15 5m -0.07 -250
1 ~ 10 f60 15 5m -0.07
* When low-strength material such as titanium is used or when the temperature of the part coming in contact with liquid is high,
the withstand pressure of diaphragm part may be lower than these figures.
* Whichever is lower of the withstand pressure of pressure of pressure switch part (1.5 times the pressure range) and that
of the diaphragm part becomes the withstand pressure of the entire pressure gauge.
* Specify the length of capillary tube by the meter.

Relationship between the size of flange/screw and the diameter of diaphragm :

Mounting method Flange type Screw type

Diaphragm diameter f60 f110 f60, f110

Mounting Model 200 Model 300 Model 200 Model 300 Model 100 (HH13)
Nominal size (HH23) (HH33) (HH23) (HH33)

10A (3/8″) o — o —
15A (1/2″) o — o —
20A (3/4″) o — o —
o — o — G3/8B
25A (1″)
o — o — G1/2B
32A (1 1/4″)
o — o — R3/8
40A (1 1/2″)
R1/2
50A (2″) o — o —
1/2NPT
65A (2 1/2″) — o o —
3/8NPT
80A (3″) — o o —
100A (4″) — o o o*
125A (5″) — o — o
150A (6″) — o — o

* Nominal size 100A is available only for 30k or higher nominal pressure.

16
 Diaphragm-Seal Type Pressure Switch (Bellows type)

OUTSIDE DIMENSIONS
High withstand pressure type (Model : HH 3 3 )

[Screw type]
Model 100 • Scerw
CB33 Pressure switch CD75 Explosion-proof pressure switch
CB13 Pressure switch
(226)
f 104 Terminal box
134 96
115 81

120
105
124

(153)
27
102
22

40
Wire outlet
G1/2B (PF)

Conduit connection Flame-proof

G1/2B (PF) packing type

f D1 fD 1 fD 1
(66)

(66)
(66)

Connecting screw size

16

16
16

L$M Hex. L$M Hex. L$M Hex.

d e d0 L$M
e
e
e

G1/2B (PF) 20 10
d fd 0 d f d0 d fd 0 24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
HH10-3 3 3 HH10- 3 3 3 HH10- 3 3 3 G1B (PF) 28 20

[Flange type] Model 200 • Flange Model 300 • Flange

fD 1
(66)

fD 1

Connecting flange
For dimensions, see the JPI
40

Connecting flange ANSI

standard dimensions of
JIS, JPI or ANSI flange.
50

For dimensions, see the JPI f32

ANSI
standard dimensions of
t

JIS, JPI or ANSI flange.

t

f
f

fg fg
fD fD

HH2 3 - 3 3 3 HH3 3 - 3 3 3

Dimensions of indicator section Outside diameter of sensor section (fD1)

Type No. Diaphragm dia. fD 1
(indicator section) Mounting f60 f105
CB13-3 3 3 Panel mounting f110 f155
CB33-3 3 3 Panel mounting * For detailed outside dimensions of indicator section, see the catalog.
CD75-33 3 Panel mounting

CD75-73 3 2B pipe mounting

17
 Diaphragm-Seal Type Differential
Pressure Gauges (with Electric Contact)
MANUFACTURING SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Remote type

Mounting method :
Screw type, Flange type

Accuracy :
±1.5%F.S./Room temperature (constant)

Working temperature range :

-5 to 40g

INDICATOR SECTION
Pressure indicator : Number of contacts : (DG97 • 98)
General differential pressure gauge ( Model : DG95 • 96) 1 or 2
Differential switch with electric contact (Model : DG97 • 98) Setting method : (DG97 • 98)
Size : External adjustment type
f100, f150 Case material/finish :
Stem : ADC12 or AC7A • Black
Surface mounting type, 2B pipe mounting * For details, see the catalog for the differential pressure gauges.
Material of main parts :
Body SCS14
Bellows SUS316L

SENSOR SECTION • FILLED LIQUID

For diaphragm type, select according to the pressure Filled liquid :
(Maximum working pressure) Silicone oil
Standard type (0.5MPa) (Model : SC 3 3) -5 ~ 100g
High pressure-proof type (2MPa) (Model : HD 3 3)
Maximum length of capillary tube :
High pressure-proof and welded type
1m or 2m
(5MPa) (Model : HE 3 3)
Note :
Diaphragm dia. : • To minimize temperature error, the diaphragm part needs
f110
to be installed on both H and L sides.
Material : • H- and L-side diaphragm parts must be at the same level.

For the material of upper/lower flange and diaphragm, see (A difference in their level leads to a difference in head,
the page for SENSOR SECTION 2. resulting in incorrect indication of differential pressure.)

18
 Diaphragm-Seal Type Differential Pressure Gauges (with Electric Contact)

FABRICATION SPECIFICATION
Relationship between differential pressure range, one-side withstand differential pressure,
and temperature coefficient (for reference only) :

Differential One-side withstand Temperature coefficient Temperature coefficient of

pressure pressure (withstand of indicator section diaphragm part (when both
range differential pressure) (including capillary tube) H and L sides are at same
MPa (MPa) (%F.S./g) temperature) (Pa/g)

0~0.05 0.2 ±0.15

~0.07 0.2 ±0.15
~0.1 0.2 ±0.1
~0.15 1.2 ±0.1 ±50
~0.2 1.2 ±0.1
~0.3 1.2 ±0.1
~0.4 1.2 ±0.1
~0.5 1.2 ±0.1

Relationship between the size of flange/screw and the diaphragm diameter

Mounting method Flange type Screw type

Mounting Model 200 Model 300 Model 100
High pressure- High pressure- Standard type (SC13)
* Type Standard type (SC23) proof and welded Standard type (SC33) proof and welded High pressure-proof type (HD13)
High pressure-proof type High pressure-proof type High pressure-proof and welded
Nominal size type (HD23) type (HD33)
(HE23) (HE33) type (HE13)
10A (3/8″) o o — —
15A (1/2″) o o — —
20A (3/4″) o o — —
25A (1″) o o — — G3/8B

o o — — G1/2B
32A (1 1/4″)
o o — — R3/8
40A (1 1/2″)
o o — — R1/2
50A (2″)
o o — — 1/2NPT
65A (2 1/2″)
— o o — 3/8NPT
80A (3″)
100A (4″) — o o —
125A (5″) — — o o
150A (6″) — — o o

* For diaphragm seal type, select according to the pressure (base pressure + differential pressure).
• Standard type (Model : SC3 3 ) : Maximum working pressure: 0.5 MPa
• High pressure-proof type (Model : HD3 3 ) : Maximum working pressure: 2 MPa
• High pressure-proof and welded type (Model : HE3 3 ) : Maximum working pressure: 5 MPa

19
Diaphragm-Seal Type Differential Pressure Gauges (with Electric Contact)

OUTSIDE DIMENSIONS 1

Standard type (Model : SC 3 3 )

[Screw type] Model 100 • Screw

DG95 • 96 General differential pressure gauge DG97 • 98 Differential pressure switch with electric contact
80

Connecting screw size

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
70 G1B (PF) 28 20

26 28

70
26 28
7 7

2B pipe 2B pipe

70 70

f140 f140 f140 f140

(28)

(28)
19 (28)

(28)
L$M Hex. L$M Hex. L$M Hex.
19

L$MHex.

19
19
e

e
e
e

d fd0 d fd0 d fd0 d fd0

SC10- 3 3 3 SC10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f140
(28)

Connecting flange f140

For dimensions, see the JPI
ANSI
Connecting flange standard dimensions of
(20)

f20
50

For dimensions, see the JPI JIS, JPI or ANSI flange.

ANSI f32
standard dimensions of
t

JIS, JPI or ANSI flange.

t

f85
f

fg fg
fD fD

SC2 3 - 3 3 3 SC3 3 - 3 3 3

Dimensions of indicator section

Mounting Size Type No.

(indicator section)

General 100 DG95-13 3

2B pipe mounting
differential 150 DG96-13 3
100 DG97-13 3
Differential 2B pipe mounting
switch with 150 DG98-13 3
electric 100 DG97-23 3
contact Surface mounting
type 150 DG98-23 3 * For detailed outside dimensions of indicator section, see the catalog of differential
pressure gauge.

20
 Diaphragm-seal Type Differential Pressure Gauges (with Electric Contact)

OUTSIDE DIMENSIONS 2
High pressure-proof type (Model : HD 3 3 )

[Screw type] Model 100 • Screw

DG95 • 96 General differential pressure gauge DG97 • 98 Differential pressure switch with electric contact
80

Connecting screw size

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
G1B (PF) 28 20

70

70
26 28 26 28
7 7

2B pipe 2B pipe

70 70
f146 f146 f146 f146
(54)

(54)
(54)

(54)
L$M Hex.
19

19

19
L$M Hex. L$M Hex.

19
L$M Hex.
e

e
d f d0 d
f d0 fd0 d fd0
d

HD10- 3 3 3 HD10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f146
(54)

f146
Connecting flange
For dimensions, see the
(29)

Connecting flange f20 standard dimensions of

For dimensions, see the JIS, JPI or ANSI flange.
49

f32
standard dimensions of
t

JIS, JPI or ANSI flange.

t

f85
f

fg fg
fD fD

HD2 3 - 3 3 3 HD3 3 - 3 3 3

Dimensions of indicator section

Type No.
Mounting Size
(indicator section)

General 100 DG95-13 3

2B pipe mounting
differential 150 DG96-13 3
100 DG97-13 3
Differential 2B pipe mounting
switch with 150 DG98-13 3
electric 100 DG97-23 3
contact Wall mounting type * For detailed outside dimensions of indicator section, see the catalog of differential
150 DG98-23 3 pressure gauge.

21
Diaphragm-Seal Type Differential Pressure Gauges (with Electric Contact)

OUTSIDE DIMENSIONS 3

High pressure-proof and welded type (Model : HE 33 )

[Screw type] Model 100 • Screw

DG95 • 96 General differential pressure gauge DG97 • 98 Differential switch with electric contact
80

Connecting screw size

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
G1B (PF) 28 20

70
70

26 28 26 28
7 7

2B pipe 2B pipe

70 70

f145 f145 f145 f145

(68)

(68)

(68)

(68)
L$M Hex. L$M Hex.
16

16
LxM Hex.
16

L$M Hex.
16

e
e
e
e

d fd0 d fd0 d fd0 d fd0

HE10- 3 3 3 HE10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f145
(68)

Connecting flange
For dimensions, see the JPI
ANSI
standard dimensions of
Connecting flange f20 JIS, JPI or ANSI flange.
50

For dimensions, see the JPI f32

t

ANSI
standard dimensions of
JIS, JPI or ANSI flange.
f
t

f120
f

fg fg
fD fD

HE2 3-333 HE33-333

Dimensions of indicator section

Type No.
Mounting Size
(indicator section)

General 100 DG95-13 3

2B pipe mounting
differential 150 DG96-13 3
100 DG97-13 3
Differential 2B pipe mounting
switch with 150 DG98-13 3
electric 100 DG97-23 3
contact Wall mounting type * For detailed outside dimensions of indicator section, see the catalog of differential
150 DG98-23 3 pressure gauge.

22
 Diaphragm-Seal type
Differential Pressure Switch
MANUFACTURING SPECIFICATION
Measured fluid :
Highly corrosive fluid, High-viscosity fluid

Type :
Remote type

Mounting method :
Screw type, Flange type

Accuracy :
±1.5%F.S./20g±10g

Working temperature range :

-5 to 40g

INDICATOR SECTION
Differential pressure switch : Number of contacts
Differential pressure switch (Model : CL71) 1 or 2 (to be set simultaneously)
Explosion-proof differential pressure switch (Model : CD71) Setting method :
Mounting : Internal adjustment type
Panel mounting, 2B pipe mounting Case material and finish :
Material of main parts : ADC12 • blue-gray two-tone paint
Diaphragm SUS316+NBR (Buna B) Acid-proof paint.
Main body SCS14 Construction :
IP65

* For details, see the catalog for differential pressure

switch.

SENSOR SECTION 2 • FILLED LIQUID

For diaphragm type, select according to the pressure Filled liquid :
(Maximum working pressure) Silicone oil
Standard type (0.5MPa) (Model : SC 3 3 ) -5 ~ 100g
High pressure-proof type (2MPa) (Model : HD 3 3 )
Maximum length of capillary tube :
High pressure-proof and welded type
1m or 2m
(5MPa) (Model : HE 3 3 )
Note :
Diaphragm dia. : • To minimize temperature error, the diaphragm part needs
f110
to be installed on both H and L sides.
Material : • H- and L-side diaphragm parts must be at the same level.

For the material of upper/lower flange and diaphragm, see (A difference in their level leads to a difference in head,
the page for SENSOR SECTION 2. resulting in incorrect indication of differential pressure.)

23
Diaphragm-seal type differential pressure switches

FABRICATION SPECIFICATION

Relationship between differential pressure range, and temperature coefficient (for reference only) :
Differential pressure switch part, Temperature coefficient of wetted
Differential
Temperature coefficient of indicator part (when both H and L sides
pressure range
section (including capillary tube) are at same temperature)
MPa
(%max. P./g) (Pa/g)
0.01~0.05 ±0.2
0.02~0.1 ±0.15
0.04~0.2 ±0.1
0.06~0.3 ±0.1
±50
0.08~0.4 ±0.1
0.1 ~0.5 ±0.1
0.12~0.6 ±0.07
0.16~0.8 ±0.07
0.2 ~1 ±0.07

Relationship between the size of flange/screw and the diameter of diaphragm

Mounting method Flange type Screw type

Mounting Model 200 Model 300 Model 100
High pressure- High pressure- Standard type (SC13)
* Type Standard type (SC23) proof and welded Standard type (SC33) proof and welded High pressure-proof type (HD13)
High pressure-proof type High pressure-proof type High pressure-proof and welded
Nominal size type (HD23) type (HD33)
(HE23) (HE33) type(HE13)
10A (3/8″) o o — —
15A (1/2″) o o — —
20A (3/4″) o o — — G3/8B
25A (1″) o o — — G1/2B
32A (1 1/4″) o o — — R3/8
40A (1 1/2″) o o — — R1/2
50A (2″) o o — — 1/2NPT
65A (2 1/2″) o o — — 3/8NPT
80A (3″) — o o —
100A (4″) — o o —
125A (5″) — — o o
150A (6″) — — o o

* For diaphragm seal type, select according to the pressure (base pressure + differential pressure).
• Standard type (Model : SC 3 3 ) : Maximum working pressure: 0.5 MPa
• High pressure-proof type (Model : HD 3 3 ) : Maximum working pressure: 2 MPa
• High pressure-proof and welded type (Model : HE 3 3 ) : Maximum working pressure: 5 MPa

24
 Diaphragm-seal type differential pressure switches

OUTSIDE DIMENSIONS 1

Standard type (Model : SC 3 3 )

[Screw type] Model 100 • Screw

CL71 Differential pressure switch CD71 Explosion-proof pressure switch

136 136
116 116
110

110

130
150
150
130
63

Connecting screw size

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G1/2B (PF) 24 15
36$41.6
G1B (PF) 28 20

Conduit gland
Pressure-proof
packing type
46 (142.5)
75 (120)

f140 f140 f140 f140

(28)

(28)
(28)

(28)
L$M Hex. L$M Hex.
19
19

L$M Hex.

19
19
L$M Hex.
e

e
d f d0 d f d0 d fd0 d fd0

SC10- 3 3 3 SC10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f140
(28)

Connecting flange f140

For dimensions, see the JPI
ANSI
Connecting flange standard dimensions of
(20)

f20
JIS, JPI or ANSI flange.
50

For dimensions, see the JPI

ANSI f32
standard dimensions of
t

JIS, JPI or ANSI flange.

f

f85
t

fg
f

fg
fD fD

SC2 3 - 3 3 3 SC3 3 - 3 3 3

Type No. Mounting

CL71-173
-273 Panel mounting

CL71-373
2B pipe mounting
-473

CL71-373
-473 Panel mounting

CL71-773
2B pipe mounting
-873
* For detailed outside dimensions of indicator section, see the catalog.

25
Diaphragm-seal type differential pressure switches

OUTSIDE DIMENSIONS 2

High pressure-proof type (Model : 3 3 )

[Screw type] Model 100 • Screw

CL71 Differential pressure switch CD71 Explosion-proof differential pressure switch

136 136
116 116
110

130
150

110

130
150
Connecting screw size
63

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
G1B (PF) 28 20

Conduit gland Flame-proof

46 (142.5) 75 packing type (120)

f146 f146 f146 f146

(54)
(54)

(54)

(54)
19

19
19

L$M Hex. L$M Hex. L$M Hex. L$M Hex.

19

e
e

e
e

d f d0 d f d0 d fd0 d fd0

HD10-3 3 3 HD10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f146
(54)

f146
Connecting flange
For dimensions, see the JPI
ANSI
(29)

Connecting flange f20 standard dimensions of

JPI
JIS, JPI or ANSI flange.
For dimensions, see the
49

ANSI f32
standard dimensions of
t

JIS, JPI or ANSI flange.

t

f85
f

fg fg
fD fD

HD2 3 - 3 3 3 HD3 3 - 3 3 3

Type No. Mounting

CL71-173
Panel mounting
-273

CL71-373
2B pipe mounting
-473

CL71-373
-473 Panel mounting

CL71-773
2B pipe mounting
-873
* For detailed outside dimensions of indicator section, see the catalog.

26
 Diaphragm-seal type differential pressure switches

OUTSIDE DIMENSIONS 3
High pressure-proof and welding type (Model : HE 3 3 )

[Screw type] Model 100 • Screw

CL71 Differential pressure switch CD71 Explosion-proof differential pressure switch

136 136
116 116

150
130

150
130
110

110
63

Connecting screw size

d e d0 L$M
G1/2B (PF) 20 10
24$27.7
G3/8B (PF) 18 8
G3/4B (PF) 24 15
36$41.6
G1B (PF) 28 20

Conduit gland Flame-proof

46 (142.5) 75 packing type (120)

f145 f145 f145 f145

(68)
(68)

(68)

(68)
L$M Hex. L$M Hex.
16

16

L$M Hex. L$M Hex.

16

16
e
e

e
e
d fd0 d fd0 d fd0 d fd0

HE10- 3 3 3 HE10- 3 3 3

[Flange type] Model 200 • Flange Model 300 • Flange

f145
(68)

Connecting flange
For dimensions, see the JPI
ANSI
standard dimensions of
Connecting flange f20 JIS, JPI or ANSI flange.
50

For dimensions, see the JPI f32

t

ANSI
standard dimensions of
JIS, JPI or ANSI flange.
f
t

f120
f

fg fg
fD fD

HE2 3 - 3 3 3 HE3 3 - 3 3 3

Type No. Mounting

CL71-173 Panel mounting

-273

CL71-373 2B pipe mounting

-473

CL71-373
Panel mounting
-473

CL71-773 2B pipe mounting

-873
* For detailed outside dimensions of indicator section, see the catalog.

27
 Type No. construction Please specify the type No., each specification and pressure (differential pressure) range when ordering.

9 10 11 12 Indicators
AC10 f75 General type pressure gauge CQ30 Pressure switch
AE10 f100 General type pressure gauge CD30 Explosion-proof pressure switch
AG10 f150 General type pressure gauge CB13 Pressure switch
BC10 f75 Weather-proof type pressure gauge CB33 Pressure switch
BC12 f75 Weather-proof type pressure gauge CD75 Explosion-proof pressure switch
BE10 f100 Weather-proof type pressure gauge DG95 f100 Differential pressure gauge
BE12 f100 Weather-proof type pressure gauge DG96 f150 Differential pressure gauge
BG10 f150 Weather-proof type pressure gauge DG97 f100 Differential switch with electric contact
BG12 f150 Weather-proof type pressure gauge DG98 f150 Differential switch with electric contact
GV42 f100 Glycerin filled type CL71 Differential pressure switch
JM11 f100 Pressure gauge with micro switch (Stem) CD71 Explosion-proof differential pressure switch
JM16 f100 Pressure gauge with micro switch (Flush type)
JM21 f150 Pressure gauge with micro switch contact (Stem)
JM26 f150 Pressure gauge with micro switch contact (Flush type)
JD10 f100 Pressure gauge with electronic contact
When you need a special indicator section other than those listed above,
please consult the nearest NAGANO KEIKI office.

Model of indicator section

Additional
Model 100 Screw type Selection specification specification(option)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

SC10 0
Type No.
13 Material of indicator section elements
High pressure-proof type 0 Nil
(Model : HD10 • HH10) 1 General (except GV42 and JD)
High pressure-proof and 2 Corrosion resistant
welded type (Model: HE10)
Basic specification is the same
as high withstand pressure type.

14 Construction
1 Screw size 0 Nil
3 G3/8B 1 Direct type
4 G1/2B 2 Remote type (Specify type and length of lead by the meter.)
G R3/8
H R1/2
L 3/8NPT
M 1/2NPT
8 Treatment
0 Nil
1 Use no oil
2 Use no water
2 Screw
3 Use no oil & water
0 Screw type

7 Middle-temperature
3 Wetted parts material (Lower flange) 0 Nil (Low-temperature)
B Middle-temperature (Higher than 100 to 230g)
2 S25C
3 SUS316
4 SUS316L
5 Monel
6 TB35C (Titanium)
6 Upper flange material
7 Hastelloy B 2 S25C
8 Hastelloy C-276 3 SUS316 15 Document
A NAS305 (Carpenter 20) 0 Nil
B SUS304 1 To be provided
(Please specify your requirements in a separate form.)
5 Diaphragm material Drawing, instruction manual, inspection procedure,
1 SUS316 + FEP lining standard inspection record (one copy per item),
2 traceability system diagram, calibration certificate,
SUS316 + FEP coating
standard inspection record, strength calculation,
4 Diaphragm diameter 3 SUS316
witnessed inspection record.
4 SUS316L
A310 CQ30 CB13 DG9 3 5 Monel
B313 JM33 JD10 CD30 CB33 C371
GV42 CD75 6 TP35C (Titanium)
4 f40 o — o o — — 7 Hastelloy B
6 f60 o o o o o — 8 Hastelloy C-276
8 f80 o o o o — — A TaP (Tantalum)
9 f110 o o — o o o D Nickel
J SUS316 + Neoprene lining
* Please indicate pressure range, dampener and radiator piping separately.

28
Type No. construction Please specify the type No., each specification and pressure (differential pressure) range when ordering.

S C 2 A JIS 5K

S C 2 1 JIS 10K
S C 2 2 JIS 16K

S C 2 3 JIS 20K
S C 2 4 JIS 30K
9 10 11 12 Indicators
AC10 f75 General type pressure gauge CQ30 Pressure switch
S C 2 5 JIS 40K
AE10 f100 General type pressure gauge CD30 Explosion-proof pressure switch
S C 2 B JIS 63K AG10 f150 General type pressure gauge CB13 Pressure switch
BC10 f75 Weather-proof type pressure gauge CB33 Pressure switch
S C 2 6 ANSI 150
BC12 f75 Weather-proof type pressure gauge CD75 Explosion-proof pressure switch
S C 2 7 ANSI 300 BE10 f100 Weather-proof type pressure gauge DG95 f100 Differential pressure gauge
BE12 f100 Weather-proof type pressure gauge DG96 f150 Differential pressure gauge
S C 2 8 ANSI 600
BG10 f150 Weather-proof type pressure gauge DG97 f100 Differential switch with electric contact
S C 2 E ANSI 1500 BG12 f150 Weather-proof type pressure gauge DG98 f150 Differential switch with electric contact
GV42 f100 Glycerin filled type CL71 Differential pressure switch
S C 2 G JPI 150
JM11 f100 Pressure gauge with micro switch (Stem) CD71 Explosion-proof differential pressure switch
S C 2 H JPI 300 JM16 f100 Pressure gauge with micro switch (Flush type)
JM21 f150 Pressure gauge with micro switch (Stem)
S C 2 K JPI 600
JM26 f150 Pressure gauge with micro switch (Flush type)
JD10 f100 Pressure gauge with electronic contact
Flange standard
Model When you need a special indicator section other than those listed above,
please consult the nearest NAGANO KEIKI office.

Model of indicator section

Additional
Model 200 Flange type Selection specification specification (option)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

SC 2
Type No.
13 Material of indicator section elements
High pressure-proof type 0 Nil
(Model : HD20 • HH20) 1 General (except GV42 and JD)
High pressure-proof and 2 Corrosion resistant
welded type (Model: HE20)
Basic specification is the same
as high withstand pressure type.

14 Construction
0 Nil
1 Flange size
1 Direct type
A 10A (3/8″) 2 Remote type (Specify type and length of lead by the meter.)
1 15A (1/2″)
2 20A (3/4″)
3 25A (1″)
4 32A (1 1/4″) 8 Treatment
5 40A (1 1/2″) 0 Nil
6 50A (2″) 1 Use no oil
7 65A (2 1/2″) 2 Use no water
8 80A (3″) 3 Use no oil & water
B 90A (3 1/2″)
C 100A (4″)
* Available flange size changes with the
type of indication part and the diameter 7 Middle-temperature
of diaphragm. For details, see fabrication 0 Nil (Low-temperature)
specification.
B Middle-temperature (Higher than 100 to 230g)

2 Flange type
1 RF
6 Upper flange material
2 FF
2 S25C
3 MF
3 SUS316
4 GF
5 TF 15 Document
6 FMF
0 Nil
8 Serration processing 5 Diaphragm material
1 To be provided
1 SUS316 + FEP lining
(Please specify your requirements in a separate form.)
2 SUS316 + FEP coating Drawing, instruction manual, inspection procedure,
3 SUS316 standard inspection record (one copy per item),
3 Wetted parts material (Lower flange) 4 SUS316L traceability system diagram, calibration certificate,
2 S25C 5 Monel standard inspection record, strength calculation,
3 SUS316 6 TP35C (Titanium) witnessed inspection record.
4 SUS316L 7 Hastelloy B
E S25C + Glass lining 8 Hastelloy C-276
F S25C + PTFE lining A TaP (Tantalum)
G S25C + FEP coating D Nickel
J S25C + Neoprene lining J SUS316 + Neoprene lining
K S25C + Crude-rubber lining
S Rigid polyvinyl chloride * 4 Diaphragm diameter
T Polypropylene *
X SUS316 + PTFE lining A310 CQ30 CB13 DG9 3
Y B313 JM33 JD10 CD30 CB33 C371
SUS316 + FEP coating
GV42 CD75
a SUS316 + Neoprene lining
4 f40 o — o o — —
b SUS316 + Crude-rubber lining
6 f60 o o o o o —
* Available only for f60 and f80 diameter diaphragms, flange 8 f80 o o o o — —
mounting FF, and JIS 10K 15A to 40A and ANSI 150LB 3/4B
9 f110 o o — o o o
to 1 1/2B flanges.
* Please indicate pressure range, dampener and radiator piping separately.

29
Type No. construction Please specify the type No., each specification and pressure (differential pressure) range when ordering.

S C 3 A JIS 5K

S C 3 1 JIS 10K
S C 3 2 JIS 16K

S C 3 3 JIS 20K
S C 3 4 JIS 30K
9 10 11 12 Indicators
AC10 f75 General type pressure gauge CQ30 Pressure switch
S C 3 5 JIS 40K
AE10 f100 General type pressure gauge CD30 Explosion-proof pressure switch
S C 3 B JIS 63K AG10 f150 General type pressure gauge CB13 Pressure switch
BC10 f75 Weather-proof type pressure gauge CB33 Pressure switch
S C 3 6 ANSI 150
BC12 f75 Weather-proof type pressure gauge CD75 Explosion-proof pressure switch
S C 3 7 ANSI 300 BE10 f100 Weather-proof type pressure gauge DG95 f100 Differential pressure gauge
BE12 f100 Weather-proof type pressure gauge DG96 f150 Differential pressure gauge
S C 3 8 ANSI 600
BG10 f150 Weather-proof type pressure gauge DG97 f100 Differential switch with electric contact
S C 3 E ANSI 1500 BG12 f150 Weather-proof type pressure gauge DG98 f150 Differential switch with electric contact
GV42 f100 Glycerin filled type CL71 Differential pressure switch
S C 3 G JPI 150
JM11 f100 Pressure gauge with micro switch (Stem) CD71 Explosion-proof differential pressure switch
S C 3 H JPI 300 JM16 f100 Pressure gauge with micro switch (Flush type)
JM21 f150 Pressure gauge with micro switch (Stem)
S C 3 K JPI 600
JM26 f150 Pressure gauge with micro switch (Flush type)
JD10 f100 Pressure gauge with electronic contact
Flange standard
Model When you need a special indicator section other than those listed above,
please consult the nearest NAGANO KEIKI office.

Model of indicator section

Additional
Model 300 Flange type Selection specification specification (option)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

SC 3
Type No.
13 Material of indicator section elements
High pressure-proof type 0 Nil
(Model : HD30 • HH30) 1 General (except GV42 and JD)
High pressure-proof and
2 Corrosion resistant
welded type (Model: HE30)
Basic specification is the same
as high withstand pressure type.

14 Construction
0 Nil
1 Flange size
1 Direct type
3 25A (1″) 2 Remote type (Specify type and length of lead by the meter.)
4 32A (1 1/4″)
5 40A (1 1/2″)
6 50A (2″)
7 65A (2 1/2″) 8 Treatment
8 80A (3″) 0 Nil
B 90A (3 1/2″) 1 Use no oil
C 100A (4″) 2 Use no water
D 120A (5″) 3 Use no oil & water
E 150A (6″)
* Available flange size changes with the
type of indication part and the diameter
of diaphragm. For details, see fabrication 7 Middle-temperature
specification.
0 Nil (Low-temperature)
B Middle-temperature (Higher than 100 to 230g)

2 Flange type
1 RF
6 Upper flange material
2 FF
2 S25C
3 MF
3 SUS316
4 GF
5 TF 15 Document
6 FMF 0 Nil
8 Serration processing 5 Diaphragm material
1 To be provided
1 SUS316 + FEP lining
(Please specify your requirements in a separate form.)
2 SUS316 + FEP coating Drawing, instruction manual, inspection procedure,
3 SUS316 standard inspection record (one copy per item),
3 Wetted parts material (Lower flange) 4 SUS316L traceability system diagram, calibration certificate,
2 S25C 5 Monel standard inspection record, strength calculation,
3 SUS316 6 TP35C (Titanium) witnessed inspection record.
4 SUS316L 7 Hastelloy B
E S25C + Glass lining 8 Hastelloy C-276
Available only for flange mounting FF. A TaP (Tantalum)
G S25C + FEP coating D Nickel
Available only for flange mounting FF. J SUS316 + Neoprene lining
J S25C + Neoprene lining
Available only for flange mounting FF.
K S25C + Crude-rubber lining 4 Diaphragm diameter
Available only for flange mounting FF.
Y SUS316 + FEP coating
A310 CQ30 CB13 DG93
B313 JM33 JD10 CD30 CB33 C371
Available only for flange mounting FF. GV42 CD75
a SUS316 + Neoprene lining 4 f40 o — o o — —
Available only for flange mounting FF. 6 f60 o o o o o —
b SUS316 + Crude-rubber lining 8 f80 o o o o — —
Available only for flange mounting FF. 9 f110 o o — o o o

* Please indicate pressure range, dampener and radiator piping separately.

30
DAMPENER

When your pressure gauge is subjected to high pulsating

pressure or surge pressure, please install the dampener to
protect the gauge.
The dampener has a variable throttle, which can be adjusted
according to pressure variation.
Dampener When installed in diaphragm-seal type pressure gauges, the
dampener throttles only the filled liquid, eliminating the
(58.5)

danger of clogging due to foreign matter. In addition, stable

throttling effect is ensured, thanks to the excellent
characteristic of filled liquid where viscosity hardly changes
with temperature.

FLANGE TYPE

FF (flat face) RF (raised face)

Application: Cast iron or copper alloy flanges of 16K Application: Flanges of 63K or lower nominal pressure.
or lower nominal pressure.

MF (male flange) TF (tongue flange)

FMF (female flange) GF (groove flange)

Application: 16K or higher nominal pressure Application: 16K or higher nominal pressure using
requiring airtightness. dangerous fluid or requiring airtightness.

* Names in ( ) are JIS, [ ] are JPI.

31
LINING & COATING

Lined or coated flange

Working
Name Thickness (mm) temperature range

34
Glass lining 0.4 ~ 0.8 -30 ~ 230g
Neoprene lining 2 -20 ~ 100g
Coating
Approx.f20 or lining Crude-rubber lining 2 -15 ~ 80g

50
Base material PTFE lining 2 -20 ~ 150g
f40 of flange
S25C FEP coating 0.2 ~ 0.3 -30 ~ 180g

There is a case where "fd" is bigger than the standard dimension,

t

fd so please pay attention to gasket size.

Available flange type: FF only

Dimension "t" does not include the thickness of coating or lining.

RADIATION TUBE

For middle temperature pressure gauges (over 100g, below 230g) or direct mounting type, or when the temperature of sensing part
becomes 180g or higher, we recommend to use the radiation tube as shown below to minimize the influence of temperature on the
indication part. Please specify the temperature of measured fluid. Remote type has similar effect.

Model 200 with radiation tube

H length
Weather-proof type Weather-proof type
Height f100 f150
H 213 228
Radiation tube
H

Material
Upper flange S25C SUS316
Radiation tube SS400 SUS316

The content of this catalog is subject to change without notice.

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AN I
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Ueda Factory (measuring instrument) (JQA-0794)

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ISO 9001
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Maruko Factory (electronic equipment) (JQA-0789)

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Agency