GEMÜ 620

Pneumatically operated diaphragm valve

Features
• Suitable for particulate and abrasive media
• Various lining materials are available, such as PFA, PP or hard
rubber
• Standard optical position indicator
• Wide range of adaptation options for add-on components and
accessories

Description
The GEMÜ 620 2/2-way diaphragm valve has a low maintenance membrane actuator made of metal or plastic and is pneumat-
ically operated. The valve has a metal distance piece. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) con-
trol functions are available.

Technical specifications
• Media temperature : 0 to 100 °C
• Ambient temperature: 0 to 60 °C
• Operating pressure : 0 to 10 bar
• Nominal sizes: DN 15 to 150
• Body configurations: 2/2-way body
• Connection types: Flange l Threaded connection
• Connection standards: ANSI l BS l EN l ISO
• Body materials: EN-GJL-250, cast iron material l EN-GJS-400-18-LT (GGG 40.3), PFA lined l EN-GJS-400-18-LT (GGG 40.3), PP
lined l EN-GJS-400-18-LT, hard rubber lined l EN-GJS-400-18-LT, SG iron material l EN-GJS-400-18-LT, SG iron material with
butyl lining l EN-GJS-400-18-LT, SG iron material with soft rubber lining l EN-GJS-500-7, ductile iron material, PFA lined l EN-
GJS-500-7, ductile iron material, PP lined
• Body lining: Hard rubber l PFA l PP
• Diaphragm materials: CR l EPDM l FKM l NBR l PTFE/EPDM l PTFE/FKM l PTFE/PVDF/EPDM
• Conformities: CRN l EAC l FDA l TA Luft (German Clean Air Act)
Technical data depends on the respective configuration

further information
webcode: GW-620
Product description

Product description
Construction
1

Item Name Materials

1 Optical position indicator PP red
2 Actuator Cast iron, PP reinforced
3 Diaphragm NBR
FKM
CR
EPDM
PTFE / EPDM (one-piece)
PTFE / EPDM (two-piece)
PTFE / FKM (two-piece)
PTFE / PVDF / EPDM (three-piece)
4 Valve body EN-GJL-250 (GG 25)
EN-GJS-400-18-LT (GGG 40.3)
EN-GJS-400-18-LT (GGG 40.3), butyl lined
EN-GJS-400-18-LT (GGG 40.3), PFA lined
EN-GJS-400-18-LT (GGG 40.3), PP lined
EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
EN-GJS-400-18-LT (GGG 40.3), soft rubber lined
EN-GJS-500-7 (GGG 50), PFA lined
EN-GJS-500-7 (GGG 50), PP lined

GEMÜ 620 2 / 26 www.gemu-group.com

 Availability

Availability
Availability of valve bodies
Threaded connection
MG DN Connection types code 1, 31 1)
Material code 90 2)
25 15 X
20 X
25 X
40 32 X
40 X
50 50 X

MG = diaphragm size, X = standard

1) Connection type
Code 1: Threaded socket DIN ISO 228
Code 31: NPT female thread

2) Valve body material

Code 90: EN-GJS-400-18-LT (GGG 40.3)

www.gemu-group.com 3 / 26 GEMÜ 620

Availability

Flange
MG DN Connection type code 1)
8 38 39 51 53 56
2)
Material code
3)
17, 18 90 17, 18 17, 18 90 17 81 91 3) 8 17 17 81 91 3)
82, 82, 82,
83, 88 83, 88 83, 88
25 15 X X X - - X X X - - - - - - - -
20 X X X X X X X X - - - X - - - -
25 X X X X X X X X - X X - - - X X
40 32 X X X - - X X X - - - - - - - -
40 X X X X X X X X - X X X - - X X
50 50 X X X X X X X X - X X X - - X X
65 X X X X X X X X - X X - - - X X
65 65 - - - - - - - - - - - X - - - -
80 80 X X X X X X X X - X X X - - X X
100 100 X X X X X X X X - X X - - - X X
125 - - X - - - - X - - - - - - - -
125 125 X - - - - X - - - - - X - - - -
150 150 X - X X - X - X X - - X X X - -

MG = diaphragm size, X = standard

1) Connection type
Code 8: Flange EN 1092, PN 16, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body configur-
ation D
Code 38: Flange ANSI Class 150 RF, face-to-face dimension FTF MSS SP-88, length only for body configuration D
Code 39: Flange ANSI Class 125/150 RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body config-
uration D
Code 51: Flange BS 10 table E, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body configuration D
Code 53: Flange EN 1092, PN 16, form A, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body config-
uration D
Code 56: Flange ANSI Class 125/150 RF, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body config-
uration D

2) Valve body material

Code 8: EN-GJL-250 (GG 25)
Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 18: EN-GJS-400-18-LT (GGG 40.3), PP lined
Code 81: EN-GJS-500-7 (GGG 50), PFA lined
Code 82: EN-GJS-400-18-LT (GGG 40.3), soft rubber lined
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code 88: EN-GJS-400-18-LT (GGG 40.3), butyl lined
Code 90: EN-GJS-400-18-LT (GGG 40.3)
Code 91: EN-GJS-500-7 (GGG 50), PP lined

3) On request

GEMÜ 620 4 / 26 www.gemu-group.com

 Availability

Availability of actuator version

MG DN Actuator version
25 15 - 25 0KN
40 32 - 40 1KN
50 50 - 65 2KN
65 65 3/1, 3/2, 3/3, 3/D, 3/F, 3A1, 3A2, 3A3,
3AD, 3AF
80 80 3/2, 3/3, 3/D, 3/F,3A2, 3A3, 3AD, 3AF, 4A2
100 100 - 125 3/3, 3/D, 3/F, 3A3, 3AD, 3AF, 4A3, 4AD,
4AF
125 125 4A2, 4A3, 4AD, 4AF
150 150 4A3, 4AD, 4AF

www.gemu-group.com 5 / 26 GEMÜ 620

Order data

Order data
The order data provide an overview of standard configurations.
Please check the availability before ordering. Other configurations available on request.

Order codes
1 Type Code 5 Valve body material Code
Diaphragm valve, pneumatically operated, 620 Cast iron material
membrane actuator, cast iron distance piece EN-GJL-250 (GG 25) 8

2 DN Code SG iron material

DN 15 15 EN-GJS-400-18-LT (GGG 40.3), 17

PFA lined
DN 20 20
EN-GJS-400-18-LT (GGG 40.3), 18
DN 25 25 PP lined
DN 32 32 EN-GJS-500-7 (GGG 50), 81
DN 40 40 PFA lined
DN 50 50 EN-GJS-400-18-LT (GGG 40.3), 82
DN 65 65 soft rubber lined

DN 80 80 EN-GJS-400-18-LT (GGG 40.3), 83

hard rubber lined
DN 100 100
EN-GJS-400-18-LT (GGG 40.3), 88
DN 125 125
butyl lined
DN 150 150
EN-GJS-400-18-LT (GGG 40.3) 90
3 Body configuration Code EN-GJS-500-7 (GGG 50), 91
PP lined
2/2-way body D
6 Diaphragm material Code
4 Connection type Code
Elastomer
Threaded connection
NBR 2
Threaded socket DIN ISO 228 1
FKM 4
NPT female thread 31
CR 8
Flange
EPDM 29
Flange EN 1092, PN 16, form B, 8
face-to-face dimension FTF EN 558 series 1, ISO 5752, PTFE
basic series 1, PTFE/EPDM one-piece 54
length only for body configuration D
PTFE/EPDM two-piece 5M
Flange ANSI Class 150 RF, 38
PTFE/FKM two-piece 5T
face-to-face dimension FTF MSS SP-88,
length only for body configuration D PTFE/PVDF/EPDM three-piece 71

Flange ANSI Class 125/150 RF, 39 Note: The PTFE/PVDF/EPDM diaphragm (code 71) can
face-to-face dimension FTF EN 558 series 1, ISO 5752, only be combined with PFA lined valve bodies.
basic series 1,
length only for body configuration D
7 Control function Code
Flange BS 10 table E, 51 Normally closed (NC) 1
face-to-face dimension FTF EN 558 series 7, ISO 5752, Normally open (NO) 2
basic series 7, Double acting (DA) 3
length only for body configuration D
Flange EN 1092, PN 16, form A, 53 8 Actuator version Code
face-to-face dimension FTF EN 558 series 7, ISO 5752, DN 15 - 25, diaphragm size 25
basic series 7,
Plastic actuator material
length only for body configuration D
Membrane actuator, plastic, diameter of 130 mm 0KN
Flange ANSI Class 125/150 RF, 56
face-to-face dimension FTF EN 558 series 7, ISO 5752, DN 32 - 40, diaphragm size 40
basic series 7, Plastic actuator material
length only for body configuration D Membrane actuator, plastic, diameter of 171 mm 1KN
DN 50 - 65, diaphragm size 50
Plastic actuator material
Membrane actuator, plastic, diameter of 211 mm 2KN

GEMÜ 620 6 / 26 www.gemu-group.com

 Order data

8 Actuator version Code 8 Actuator version Code

DN 65, diaphragm size 65 Actuator size 3/D 3/D
Plastic actuator material Actuator size 3/F 3/F
Actuator size 3/1 3/1 Metal actuator material
Actuator size 3/2 3/2 Actuator size 3A3 3A3
Actuator size 3/3 3/3 Actuator size 3AD 3AD
Actuator size 3/D 3/D Actuator size 3AF 3AF
Actuator size 3/F 3/F Actuator size 4A3 4A3
Metal actuator material Actuator size 4AD 4AD
Actuator size 3A1 3A1 Actuator size 4AF 4AF
Actuator size 3A2 3A2 DN 125, diaphragm size 125
Actuator size 3A3 3A3 Metal actuator material
Actuator size 3AD 3AD Actuator size 4A2 4A2
Actuator size 3AF 3AF Actuator size 4A3 4A3
DN 80, diaphragm size 80 Actuator size 4AD 4AD
Plastic actuator material Actuator size 4AF 4AF
Actuator size 3/2 3/2 DN 150, diaphragm size 150
Actuator size 3/3 3/3 Metal actuator material
Actuator size 3/D 3/D Actuator size 4A3 4A3
Actuator size 3/F 3/F Actuator size 4AD 4AD
Metal actuator material Actuator size 4AF 4AF
Actuator size 3A2 3A2 Note: On all actuators, the control air connector is 90°
Actuator size 3A3 3A3 offset to flow direction.

Actuator size 3AD 3AD 9 Mounting type Code

Actuator size 3AF 3AF With NAMUR mounting bracket N0
Actuator size 4A2 4A2 With NAMUR mounting bracket and handwheel NH
DN 100 - 125, diaphragm size 100
Plastic actuator material
Actuator size 3/3 3/3

Order example
Ordering option Code Description
1 Type 620 Diaphragm valve, pneumatically operated,
membrane actuator, cast iron distance piece
2 DN 80 DN 80
3 Body configuration D 2/2-way body
4 Connection type 8 Flange EN 1092, PN 16, form B,
face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1,
length only for body configuration D
5 Valve body material 90 EN-GJS-400-18-LT (GGG 40.3)
6 Diaphragm material 29 EPDM
7 Control function 1 Normally closed (NC)
8 Actuator version 3/3 Actuator size 3/3
9 Mounting type Without

www.gemu-group.com 7 / 26 GEMÜ 620

Technical data

Technical data
Medium
Working medium: Corrosive, inert, gaseous and liquid media which have no negative impact on the physical and
chemical properties of the body and diaphragm material.

Control medium: Inert gases

Temperature
Media temperature: NBR (code 2) -10 — 100 °C
FKM (code 4) -10 — 90 °C
CR (code 8) -10 — 100 °C
EPDM (code 29) -10 — 100 °C
PTFE / EPDM (code 54) -10 — 100 °C
PTFE / EPDM (code 5M) -10 — 100 °C
PTFE / FKM (code 5T) -10 — 100 °C
PTFE / PVDF / EPDM (code 71) -10 — 100 °C

Control medium temper- 0 — 40 °C

ature:

Ambient temperature: 0 — 60 °C

Storage temperature: 0 — 40 °C

GEMÜ 620 8 / 26 www.gemu-group.com

 Technical data

Pressure
Operating pressure: MG DN Control Actuator EPDM PTFE
function size
25 15 - 25 1, 2, 3 0KN 0 - 10 0 - 10
40 32 - 40 1, 2, 3 1KN 0 - 10 0 - 10
50 50 - 65 1, 2, 3 2KN 0 - 10 0 - 10
65 65 1 3/1 0-3 0-2
3A1 0-3 0-2
3/2 0-6 0-4
3A2 0-6 0-4
3/3 0 - 10 0-6
3A3 0 - 10 0-6
2 3/F, 3AF 0 - 10 0-6
3 3/D, 3AD 0 - 10 0-6
80 80 1 3/2 0-3 0-2
3A2 0-3 0-2
3/3 0-7 0-5
3A3 0-7 0-5
4A2 0 - 10 0-6
2 3/F, 3AF 0 - 10 0-6
3 3/D, 3AD 0 - 10 0-6
100 100 - 125 1 3/3 0-6 0-4
3A3 0-6 0-4
4A3 0 - 10 0-6
2 3/F 0-6 0-4
3AF 0-6 0-4
4AF 0 - 10 0-6
3 3/D 0-6 0-4
3AD 0-6 0-4
4AD 0 - 10 0-6
125 125 1 4A2 0-5 0-3
4A3 0-8 0-5
2 4AF 0 - 10 0-6
3 4AD 0 - 10 0-6
150 150 1 4A3 0-6 0-4
2 4AF 0-8 0-5
3 4AD 0-8 0-5

MG = diaphragm size
All pressures are gauge pressures. Operating pressure values were determined with static operating pressure
applied on one side of a closed valve. Sealing at the valve seat and atmospheric sealing is ensured for the given
values.
Information on operating pressures applied on both sides and for high purity media on request.

Pressure rating: PN 16

Leakage rate: Leakage rate A (acc. to EN 12266-1)

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Technical data

Control pressure: MG DN Control function Actuator size Control pressure

25 15 - 25 1 0KN 5.5 - 7.0
2 0KN max. 5.5
3 0KN max. 5.5
40 32 - 40 1 1KN 5.5 - 7.0
2 1KN max. 5.5
3 1KN max. 5.5
50 50 - 65 1 2KN 5.5 - 7.0
2 2KN max. 5.0
3 2KN max. 5.0
65 65 1 3/1 2.6 - 7.0
3A1 3.0 - 7.0
3/2 4.5 - 7.0
3A2 4.5 - 7.0
3/3 5.5 - 7.0
3A3 6.0 - 7.0
2 3/F, 3AF max. 4.5
3 3/D, 3AD max. 4.0
80 80 1 3/2 4.5 - 7.0
3A2 5.0 - 7.0
3/3 5.6 - 7.0
3A3 6.5 - 7.0
4A2 3.5 - 7.0
2 3/F, 3AF max. 5.5
3 3/D, 3AD max. 5.0
100 100 - 125 1 3/3 6.2 - 7.0
3A3 6.5 - 7.0
4A3 4.5 - 7.0
2 3/F max. 5.0
3AF max. 5.0
4AF max. 3.5
3 3/D max. 4.5
3AD max. 4.5
4AD max. 3.0
125 125 1 4A2 4.0 - 7.0
4A3 5.5 - 7.0
2 4AF max. 4.5
3 4AD max. 4.0
150 150 1 4A3 5.5 - 7.0
2 4AF max. 4.5
3 4AD max. 4.0

MG = diaphragm size

GEMÜ 620 10 / 26 www.gemu-group.com

 Technical data

Control pressure: Control pressure/operating pressure diagram

Actuator 3/F, 3AF, 3/D, 3AD Actuator 4AF, 4AD
7 7

Control pressure bar [bar]

Control pressure bar [bar]

6 0 6
25 DN 8
5
DN 100/1 DN 65
5 50
DN 1
4 4 25
DN 1
3 3 /125
DN 100
2 2
1 1
0 0
0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10

Operating pressure [bar] Operating pressure [bar]

EPDM - Actuator 0KN, 1KN, 2KN PTFE - Actuator 0KN, 1KN, 2KN
6
7
Control pressure [bar]

Control pressure [bar]

5 6

4 5

0KN 4 0KN
3
1KN
1KN
2KN 3
2 2KN
2
1
1

0
0
0 2 4 6 8 10
0 2 4 6 8 10

Operating pressure [bar] Operating pressure [bar]

Note: The above diagrams give the minimum control pressure for "normally open" actuators (con-
trol function 2) for different operating pressures.

Filling volume: Actuator size 0 0.15 dm³

Actuator size 1 0.35 dm³
Actuator size 2 1.10 dm³
Actuator size 3 2.50 dm³
Actuator size 4 6.80 dm³
Actuator size 0KN 0.16 dm³
Actuator size 1KN 0.40 dm³
Actuator size 2KN 0.69 dm³

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Technical data

Cv values: MG DN Cast body without lining Rubber- Plastic-

Threaded body Flanged body lining lining

Material code 8, 90 Material code 82, Material code 17,

83, 88 18, 81, 91
25 15 8.0 10.0 5.0 6.0
20 11.5 14.0 9.0 11.0
25 11.5 17.0 13.0 15.0
40 32 28.0 36.0 23.0 29.0
40 28.0 40.0 26.0 32.0
50 50 60.0 68.0 47.0 64.0
65 - 68.0 47.0 64.0
65 65 - 100.0 - -
80 80 - 130.0 110.0 128.0
100 100 - 200.0 177.0 190.0
125 - 200.0 - -
125 125 - - 214.0 230.0
150 150 - 484.0 365.0 397.0

MG = diaphragm size, Kv values in m³/h

Kv values determined in accordance with DIN EN 60534, inlet pressure 5 bar, Δp 1 bar, with connection flange
EN 1092 length EN 558 series 1 (or threaded socket DIN ISO 228 for body material GGG40.3) and soft elastomer
diaphragm. The Kv values for other product configurations (e.g. other diaphragm or body materials) may differ.
In general, all diaphragms are subject to the influences of pressure, temperature, the process and their tighten-
ing torques. Therefore the Kv values may exceed the tolerance limits of the standard.
The Kv value curve (Kv value dependent on valve stroke) can vary depending on the diaphragm material and dur-
ation of use.

Product compliance
Pressure Equipment Dir- 2014/68/EU
ective:

Machinery Directive: 2006/42/EC

Food: FDA*
Regulation (EC) No. 1935/2006
Regulation (EC) No. 10/2011*

EAC: TR CU 010/2011

TA Luft (German Clean The product complies with the equivalence requirements of section 5.2.6.4 of the German Clean Air
Air Act): Act (TA Luft / VDI 2440 according to section 3.3.1.3)*
The product complies with the requirements according to VDI 2440 (November 2000), VDI 3479,
DIN EN ISO 158481, certificate no. 18 11 090235 002*
* see availability

GEMÜ 620 12 / 26 www.gemu-group.com

 Technical data

Mechanical data
Weight: Actuator
MG Actuator size Control function Weight
25 0KN 1 2.2
0KN 2+3 1.7
40 1KN 1 4.7
1KN 2+3 3.1
50 2KN 1 6.9
2KN 2+3 5.2
65 3/1 1 14.4
3/2 15.1
3/3 15.8
3A1 23.8
3A2 24.6
3A3 25.8
3/F – 3/D 2+3 14.0
3AF – 3AD 18.2
80 3/2 1 16.5
3/3 17.2
3A2 26.4
3A3 27.4
4A2 54.7
3/F – 3/D 2+3 15.2
3AF – 3AD 20.0
100 3/3 1 17.8
3A3 28.1
4A3 63.3
3/F – 3/D 2+3 16.0
3AF – 3AD 21.0
4AF – 4AD 35.0
125 4A2 1 58.0
4A3 66.0
4AF – 4AD 2+3 35.0
150 4A3 1 67.0
4AF – 4AD 2+3 45.0

MG = diaphragm size
Weights in kg

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Technical data

Weight: Body

MG DN Threaded socket Flange

Connection type code
1, 31 8, 38, 39, 51, 53, 56
25 15 0.50 1.50
20 0.60 2.20
25 0.90 2.80
40 32 1.40 3.40
40 1.90 4.50
50 50 2.70 6.30
65 - 10.30
80 80 - 13.80
100 100 - 20.80
125 - 26.30
150 150 - 37.30

MG = diaphragm size
Weights in kg

GEMÜ 620 14 / 26 www.gemu-group.com

 Dimensions

Dimensions
Actuator dimensions
Control function 1
øB øB øB

A
A

A
A1
G

G
A1

A1
Actuator size 0–2 Actuator size 3 Actuator size 4
0KN, 1KN, 2KN

MG DN Actuator øB A A1 G
version
25 15 - 25 0KN 130 170 59 G 1/4
40 32 - 40 1KN 171 208 75 G 1/4
50 50 - 65 2KN 211 244 90 G 1/4
65 65 3/1 259 333 173 G 1/4
3/2 259 333 173
3/3 259 333 173
3A1 256 307 172
3A2 256 307 172
3A3 256 307 172
80 80 3/2 259 333 173 G 1/4
3/3 259 333 173
3A2 256 307 172
3A3 256 307 172
4A2 360 439 159
100 100 - 125 3/3 259 333 173 G 1/4
3A3 256 307 172
4A3 360 439 159
125 125 4A2 360 451 171 G 1/4
4A3 360 451 171
150 150 4A3 360 440 160 G 1/4

Dimensions in mm
MG = diaphragm size

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Dimensions

Control functions 2 + 3
øB øB øB

G
G

A2
A2
G
G

A
A2

A1
A1
A
G

A1

Actuator size 0 – 2 Actuator size 3 Actuator size 4

0KN, 1KN, 2KN

MG DN Actuator øB A A1 A2 G
size
25 15 - 25 0KN 130 147 59 39 G 1/4
40 32 - 40 1KN 171 173 75 42 G 1/4
50 50 - 65 2KN 211 206 90 47 G 1/4
65 65 3/F - 3/D 258 284 170 45 G 1/4
3AF - 3AD 258 284 170 45 G 1/4
80 80 3/F - 3/D 256 282 169 45 G 1/4
3AF - 3AD 256 282 169 45 G 1/4
100 100 - 125 3/F -3/D 256 282 169 45 G 1/4
3AF - 3AD 256 282 169 45 G 1/4
4AF - 4AD 360 322 156 109 G 1/4
125 125 4AF - 4AD 360 334 168 109 G 1/4
150 150 4AF - 4AD 360 323 156 109 G 1/4

Dimensions in mm
MG = diaphragm size

GEMÜ 620 16 / 26 www.gemu-group.com

 Dimensions

Mounting type with NAMUR mounting bracket

ØE
C

AH

AH
Control function 1 Control function 1
Mounting type with NAMUR mounting Mounting type with NAMUR mounting
bracket and handwheel (code NH) bracket (code N0)

MG DN AH C ØE
Mounting type Mounting type
code N0 code NH
65 - 150 65 - 150 181.0 305.0 132.0 316.0

Dimensions in mm
MG = diaphragm size

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Dimensions

Body dimensions
Flange EN (code 8)
ØL
H1

ØD
øk
FTF

Connection type flange, length EN 558 (code 8) 1), SG iron material (code 17, 18, 82, 83, 88, 90) 2)

MG DN øD øk øL n H1 FTF
Material Material
17, 82, 83, 18 90 17, 82, 83, 18 90
88 88
25 15 95.0 65.0 14.0 4 18.0 18.0 14.0 130.0 13.,0 130.0
20 105.0 75.0 14.0 4 20.5 20.5 16.5 150.0 150.0 150.0
25 115.0 85.0 14.0 4 23.0 23.0 19.5 160.0 160.0 160.0
40 32 140.0 100.0 19.0 4 28.7 28.7 23.0 180.0 180.0 180.0
40 150.0 110.0 19.0 4 33.0 33.0 27.0 200.0 200.0 200.0
50 50 165.0 125.0 19.0 4 39.0 39.0 32.0 230.0 230.0 230.0
65 185.0 145.0 19.0 4 51.0 51.0 38.7 290.0 290.0 290.0
80 80 200.0 160.0 19.0 8 59.5 59.5 31.5 310.0 310.0 310.0
100 100 220.0 180.0 19.0 8 73.0 73.0 43.0 350.0 350.0 350.0
125 250.0 210.0 19.0 8 - - 58.0 - 350.0 400.0
125 125 250.0 210.0 19.0 8 87.0 - - 400.0 - -
150 150 285.0 240.0 23.0 8 109.0 - 58.0 480.0 - 480.0

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 8: Flange EN 1092, PN 16, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body configur-
ation D

2) Valve body material

Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 18: EN-GJS-400-18-LT (GGG 40.3), PP lined
Code 82: EN-GJS-400-18-LT (GGG 40.3), soft rubber lined
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code 88: EN-GJS-400-18-LT (GGG 40.3), butyl lined
Code 90: EN-GJS-400-18-LT (GGG 40.3)

GEMÜ 620 18 / 26 www.gemu-group.com

 Dimensions

Flange EN (code 53)

ØL
H1

ØD
øk
FTF

Connection type flange, length EN 558 (code 53) 1), cast iron material (code 8), SG iron material (code 17) 2)

MG DN øD øk øL n H1 FTF
Material Material
8 17 8 17 8 17
25 20 105.0 - 75.0 14.0 4 19.0 - 117.0 -
40 40 150.0 - 110.0 19.0 4 28.0 - 159.0 -
50 50 165.0 - 125.0 19.0 4 35.0 - 191.0 -
65 65 185.0 - 145.0 19.0 4 27.5 - 216.0 -
80 80 200.0 - 160.0 19.0 8 33.0 - 254.0 -
125 125 250.0 - 210.0 19.0 8 65.0 - 356.0 -
3)
150 150 285.0 280.0 240.0 23.0 8 58.0 109.0 406.0 416.0

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 53: Flange EN 1092, PN 16, form A, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body config-
uration D

2) Valve body material

Code 8: EN-GJL-250 (GG 25)
Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined

3) Diameter deviates from standard

www.gemu-group.com 19 / 26 GEMÜ 620

Dimensions

Flange ANSI Class (code 38, 39)

ØL
H1

ØD
øk
FTF

Connection type flange, length MSS SP-88 (code 38) 1), SG iron material (code 17, 18, 82, 83, 88) 2)

MG DN øD øk øL n H1 FTF
Material Material
17, 82, 83, 18 17 18 82, 83, 88
88
25 20 100.0 69.9 15.9 4 20.5 20.5 146.0 146.0 146.4
25 110.0 79.4 15.9 4 23.0 23.0 146.0 146.0 146.4
40 40 125.0 98.4 15.9 4 33.0 33.0 175.0 175.0 171.4
50 50 150.0 120.7 19.0 4 39.0 39.0 200.0 200.0 197.4
65 180.0 139.7 19.0 4 51.0 51.0 226.0 226.0 222.4
80 80 190.0 152.4 19.0 4 59.5 59.5 260.0 260.0 260.4
100 100 230.0 190.5 19.0 8 73.0 73.0 327.0 327.0 324.4
150 150 280.0 241.3 22.2 8 109.0 - 416.0 - 416.0

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 38: Flange ANSI Class 150 RF, face-to-face dimension FTF MSS SP-88, length only for body configuration D

2) Valve body material

Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 18: EN-GJS-400-18-LT (GGG 40.3), PP lined
Code 82: EN-GJS-400-18-LT (GGG 40.3), soft rubber lined
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code 88: EN-GJS-400-18-LT (GGG 40.3), butyl lined

GEMÜ 620 20 / 26 www.gemu-group.com

 Dimensions

ØL
H1

ØD
øk
FTF

Connection type flange, length EN 558 (code 39), 1) SG iron material (code 17, 18, 82, 83, 88, 90) 2)

MG DN øD øk øL n H1 FTF
Material Material
17, 82, 83, 18 90 17, 82, 83, 18 90
88 88
25 15 90.0 60.3 15.9 4 18.0 18.0 14.0 130.0 130.0 130.0
20 100.0 69.9 15.9 4 20.5 20.5 16.5 150.0 150.0 150.0
25 110.0 79.4 15.9 4 23.0 23.0 19.5 160.0 160.0 160.0
40 32 115.0 88.9 15.9 4 28.7 28.7 23.0 180.0 180.0 180.0
40 125.0 98.4 15.9 4 33.0 33.0 27.0 200.0 200.0 200.0
50 50 150.0 120.7 19.0 4 39.0 39.0 32.0 230.0 230.0 230.0
65 180.0 139.7 19.0 4 51.0 51.0 38.7 290.0 290.0 290.0
80 80 190.0 152.4 19.0 4 59.5 59.5 31.5 310.0 310.0 310.0
100 100 230.0 190.5 19.0 8 73.0 73.0 43.0 350.0 350.0 350.0
125 255.0 215.9 22.2 8 - - 58.0 - - 400.0
125 125 255.0 215.9 22.2 8 87.0 - - 400.0 - -
150 150 280.0 241.3 22.2 8 109.0 - 58.0 480.0 - 480.0

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 39: Flange ANSI Class 125/150 RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body config-
uration D

2) Valve body material

Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 18: EN-GJS-400-18-LT (GGG 40.3), PP lined
Code 82: EN-GJS-400-18-LT (GGG 40.3), soft rubber lined
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code 88: EN-GJS-400-18-LT (GGG 40.3), butyl lined
Code 90: EN-GJS-400-18-LT (GGG 40.3)

www.gemu-group.com 21 / 26 GEMÜ 620

Dimensions

Flange ANSI Class (code 56)

ØL
H1

ØD
øk
FTF

Connection type flange, length EN 558 (code 56), 1) SG iron material (code 17, 81, 91) 2)

MG DN øD øk øL n H1 FTF
Material Material
17 81, 91 17 81, 91
25 25 110.0 79.4 15.9 4 - 23.0 - 127.0
40 40 125.0 98.4 15.9 4 - 32.0 - 165.0
50 50 150.0 120.7 19.0 4 - 40.0 - 191.0
65 180.0 139.7 19.0 4 - 47.5 - 216.0
80 80 190.0 152.4 19.0 4 - 58.0 - 254.0
100 100 230.0 190.5 19.0 8 - 70.0 - 311.0
150 150 280.0 241.3 22.2 8 109.0 - 416.0 -

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 56: Flange ANSI Class 125/150 RF, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body config-
uration D

2) Valve body material

Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 81: EN-GJS-500-7 (GGG 50), PFA lined
Code 91: EN-GJS-500-7 (GGG 50), PP lined

GEMÜ 620 22 / 26 www.gemu-group.com

 Dimensions

Flange BS (code 51)

ØL
H1

ØD
øk
FTF

Connection type flange, length EN 558 (code 51), 1) SG iron material (code 17, 81, 91) 2)

MG DN øD øk øL n H1 FTF
Materials Materials
17 81, 91 17 81, 91
25 25 114.0 83.0 14.0 4 - 23.0 - 127.0
40 40 133.0 98.0 14.0 4 - 32.0 - 165.0
50 50 152.0 114.0 17.0 4 - 40.0 - 191.0
65 165.0 127,0 17.0 4 - 47.5 - 216.0
80 80 184.0 146.0 17.0 4 - 58.0 - 254.0
100 100 216.0 178.0 17.0 8 - 70.0 - 311.0
150 150 279.0 235.0 22.0 8 109.0 - 416.0 -

Dimensions in mm
MG = diaphragm size
n = number of bolt holes
1) Connection type
Code 51: Flange BS 10 table E, face-to-face dimension FTF EN 558 series 7, ISO 5752, basic series 7, length only for body configuration D

2) Valve body material

Code 17: EN-GJS-400-18-LT (GGG 40.3), PFA lined
Code 81: EN-GJS-500-7 (GGG 50), PFA lined
Code 91: EN-GJS-500-7 (GGG 50), PP lined

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Dimensions

Threaded socket DIN (code 1)

H1

R
H

SW2
t
L

Connection type threaded socket (code 1) 1), SG iron material (code 90) 2)
MG DN NPS H H1 L n R SW 2 t
25 15 1/2" 32.7 16.7 85.0 6 G 1/2 32 15.0
20 3/4" 42.0 21.5 85.0 6 G 3/4 41 16.3
25 1" 46.7 23.7 110.0 6 G1 46 19.1
40 32 1¼" 56.0 28.5 120.0 6 G 1¼ 55 21.4
40 1½" 66.0 33.5 140.0 6 G 1½ 65 21.4
50 50 2" 76.0 38.5 165.0 6 G2 75 25.7

Dimensions in mm
MG = diaphragm size
n = number of flats
1) Connection type
Code 1: Threaded socket DIN ISO 228

2) Valve body material

Code 90: EN-GJS-400-18-LT (GGG 40.3)

Threaded socket NPT (code 31)

H1

R
H

SW2
t
L

Connection type threaded socket NPT (code 31) 1), SG iron material (code 90) 2)
MG DN NPS H H1 L n R SW 2 t
25 15 1/2" 32.7 16.7 85.0 6 NPT 1/2 32 13.6
20 3/4" 42.0 21.5 85.0 6 NPT 3/4 41 14.1
25 1" 46.7 23.7 110.0 6 NPT 1 46 16.8
40 32 1¼" 56.0 28.5 120.0 6 NPT 1¼ 55 17.3
40 1½" 66.0 33.5 140.0 6 NPT 1½ 65 17.3
50 50 2" 76.0 38.5 165.0 6 NPT 2 75 17.7

Dimensions in mm
MG = diaphragm size
n = number of flats
1) Connection type
Code 31: NPT female thread

2) Valve body material

Code 90: EN-GJS-400-18-LT (GGG 40.3)

GEMÜ 620 24 / 26 www.gemu-group.com

 Accessories

Accessories
GEMÜ 1450
NAMUR mounting bracket
GEMÜ 1450 is a NAMUR mounting bracket for pneumatically operated diaphragm valves and globe valves.
An integrated optical position indicator is standard. The product is available either with or without hand-
wheel as a manual override. It has height adjustable trip cams. The mounting parts are included.

www.gemu-group.com 25 / 26 GEMÜ 620

 Subject to alteration | 05.2024 | 88048757

GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG

Fritz-Müller-Straße 6-8, 74653 Ingelfingen-Criesbach, Germany
Phone +49 (0) 7940 1230 · info@gemue.de
www.gemu-group.com