SS-2 Differential Pressure Switch
Phone (504) 340-0055
Fax (504) 340-0056
SS-2 Differential
Pneumatic Differential Pressure Switch
FEATURES
316 stainless steel construction (models to N.A.C.E. MR0175 available).
Differential pressure range from .5 to 80 psi.
Block-and-bleed 3-way valve.
Holds constant and accurate set points.
Designed for 1% plus or minus repeatability on set points.
Minimum deadband between trip and reset pressure.
Spring may be replaced with instrument and sensing pressure present in the sensor.
Vent above sensing piston prevents high pressure from entering instrument supply
should a piston seal leak develop.
Optional tamper proof lock-out device available.
Optional mounting brackets available.
GENERAL DESCRIPTION:
The Ruelco 'SS-2' pneumatic differential pressure switch ia a three
way block and bleed valve that is operated by pressure acting on a piston
opposing an adjustable spring force. It functions as either a normally closed
or normally open valve, depending on which of the two ports the
instrument pressure is supplied through.These ports are marked as 'HI IN'
or 'LO IN' on the switch body. The output port, marked 'OUT' on the
switch body, is the same for either mode of operation. The difference
between the pressures acting on the upstream and downstream sensing
ports is the differential pressure which causes the valve to operate.
Parts List For Differential Pressure Switch Model 4202
1
1
----------1
1
1
3
1
1
2
2
2
2
2
1
1
1
1
1
1
1
2
2
1
---
Spring Cap
Spring (Blue)
Spring (Red)
Spring (Silver)
Spring (Green) optional
Spring (Yellow) optional
Spring (Purple) optional
Lock Ring
Panel Mnt. Ring (Optional)
Spring Plate
Spool O-ring
Body For SS-2
Spool For SS-2
Sleeve Seal
Guide Sleeve
Back-Up Ring
Shaft Seal
Hex Nut
Lock Washer
Base Seal
Piston Seal
Piston
Piston / Shaft Seal
Lower Housing
Shaft
Seal Retainer
Retainer Ring
Upper Housing
Repair Kit
316L or ASTM-A-351 S.S.
ASTM-401
ASTM-401
ASTM-401
Inconel X-750
Inconel X-750
Inconel X-750
AISI 316 St. Stl.
AISI 316 St. Stl.
AISI 316 St. Stl.
Viton
CF-8M St. Stl.
17-4 PH St. Stl.
Viton
AISI 316 St. Stl.
Teflon
Fluorosilocone
AISI 316 St. Stl.
AISI 316 St. Stl.
Viton
Viton
17-4 PH St. Stl.
Viton
17-4 PH St. Stl.
17-4 PH St. Stl.
AISI 316 St. Stl.
302 St. Stl.
17-4 PH St. Stl.
* Items
41-009-0A0
41-012-000
41-013-000
41-014 -000
41-019-000
41-020-000
41-021-000
42-015-000
41-023-000
41-008-0A0
VO-008-75T
42-001-0B0
42-004 -0A0
VO-020-75H
4D-004-000
TB-008-00C
FO-008-70T
T6-08K-0G3
WA-0X0-H43
VO-237-75H
VU-334-75T
4D-003-000
VO-008-75H
4D-002-000
4D-005-000
4D-006-000
S2-910-903
4D-001-0A0
4D-008-000
Ordering Code: 4202 X D X 0 0 0
BASE MODEL NUMBER
MATERIAL OPTIONS
Standard Corrosive Service - (-)
N.A.C.E. Option N
1.62 (41.1)
3.75 (95.3)
.375 (9.5)
1/8" NPT(F)
1/4" NPT(F)
8.7 LBS. (3.95 KG.)
Spring Codes
(COLOR)
DIFFERENTIAL PRESSURE RANGE
PSI (BAR)
RANGE CHART
STANDARD
SPRING
INCONEL
SPRING
.5-20
(.03-1.4)
B (Blue)
R (Red)
S (Silver)
G (Green)
Y (Yellow)
P (Purple)
4-40
(.3-2.75)
10-80
(.7-5.5)
X
X
Specifications
2000
(138)
Cv Factor
1
2A
2B
2C
2D
2E
2F
3
4
5
6*
7
8
9*
10
11*
12*
13
14
15*
16*
17
18*
19
20
21
22*
23
24
Dimensions Inch (MM)
G
H
I
SENSE PORTS
VALVE PORTS
ASSY.WT.
Set Point
Range
PSI (BAR)
Part No.
Max. Process
Fluid Temperature
Material
Ambient
Temperature
Range
Description
MAX. Sensor Operating
Pressure PSI (BAR)
@ 100 deg. F (37 deg.C)
Qty.
MAX. Sensor
Test Press. PSI (BAR)
@ 100 deg. F (37 deg. C)
Item
6000 -20 to 250 deg. F 250 deg. F
.5-80
(414) -29 to 122 deg. C (122 deg. C) (.034-5.52)
0.030
SPRING CODE (see range chart)
While this information is presented in good faith and believed to be accurate, Ruelco, Inc. does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed
as a warranty or guarantee, expressed or implied, regarding the performance, merchantability, and fitness with respect to the products. Ruelco, Inc. reserves the right, without notice, to alter or improve the designs
or specifications of the products described herein.
