GEMÜ 687

Pneumatically operated diaphragm valve

Features
• Hermetic separation between medium and actuator
• CIP/SIP capable
• Wide range of adaptation options for add-on components and
accessories
• Suitable for particulate and abrasive media
• Stainless steel body suitable for corrosive environments
• Wide range of adaptation options for add-on components and
accessories

Description
The GEMÜ 687 2/2-way diaphragm valve has a low-maintenance plastic membrane actuator and is pneumatically operated. The
valve has a metal distance piece. Normally Closed (NC), Normally Open (NO) and Double Acting (DA) control functions are avail-
able.

Technical specifications
• Media temperature: -10 to 100 °C
• Sterilization temperature: max. 150 °C
• Ambient temperature: 0 to 60 °C
• Operating pressure : 0 to 10 bar
• Nominal sizes: DN 10 to 100
• Body configurations: 2/2-way body l Tank valve body l T-body
• Connection types: Clamp l Flange l Spigot l Threaded connection
• Connection standards: ANSI l ASME l BS l DIN l EN l ISO l JIS l NPT l SMS
• Body materials: 1.4408, investment casting material l 1.4408, investment casting material, PFA lined l 1.4435 (316L), forged
material l 1.4435, investment casting 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
• Body lining: Hard rubber l PFA l PP
• Diaphragm materials: EPDM l FKM l PTFE
• Conformities: 3A l Belgaqua l CRN l EAC l FDA l Functional safety l Oxygen l Reg. (EU) No. 10/2011 l Regulation (EC) No.
1935/2004 l TA Luft (German Clean Air Act) l USP
Technical data depends on the respective configuration

further information
webcode: GW-687
Product description

Product description
Construction
1

3
8

5
7
6

Item Name Materials

1 Position indicator
2 Membrane actuator PP, glass fibre reinforced
3 Control air connector
4 Diaphragm EPDM
FKM
PTFE/EPDM (one-piece, two-piece)
PTFE/PVDF/EPDM (three-piece)
5 Valve body 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
1.4408, investment casting
1.4408, PFA lined
1.4435 (F316L), forged body
1.4435 (BN2), forged body, Δ Fe < 0.5 %
1.4435, investment casting
1.4539, forged body
6 CONEXO diaphragm RFID chip
(see Conexo information)
7 CONEXO body RFID chip
(see Conexo information)
8 CONEXO actuator RFID chip
(see Conexo information)

GEMÜ 687 2 / 34 www.gemu-group.com

 Product description

GEMÜ CONEXO
The interaction of valve components that are equipped with RFID chips and an associated IT infrastructure actively increase
process reliability.

Thanks to serialization, every valve and every relevant valve component such as the body, actuator or diaphragm, and even auto-
mation components, can be clearly traced and read using the CONEXO pen RFID reader. The CONEXO app, which can be in-
stalled on mobile devices, not only facilitates and improves the "installation qualification" process, but also makes the mainten-
ance process much more transparent and easier to document. The app actively guides the maintenance technician through the
maintenance schedule and directly provides him with all the information assigned to the valve, such as test reports, testing doc-
umentation and maintenance histories. The CONEXO portal acts as a central element, helping to collect, manage and process
all data.

For further information on GEMÜ CONEXO please visit:

www.gemu-group.com/conexo

Ordering
GEMÜ Conexo must be ordered separately with the ordering option "CONEXO".

www.gemu-group.com 3 / 34 GEMÜ 687

Availabilities

Availabilities
Availability of grades of surface finish
Internal surface finishes for forged and block material bodies 1)

Readings for Process Mechanically polished 2) Electropolished

Contact Surfaces Hygiene class Code Hygiene class Code
DIN 11866 DIN 11866
Ra ≤ 0.80 μm H3 1502 HE3 1503
Ra ≤ 0.60 μm - 1507 - 1508
Ra ≤ 0.40 μm H4 1536 HE4 1537
3)
Ra ≤ 0.25 μm H5 1527 HE5 1516

Readings for Process Mechanically polished 2) Electropolished

Contact Surfaces ASME BPE Code ASME BPE Code
according to ASME BPE Surface Surface
2016 4) Designation Designation
Ra Max. = 0.76 μm (30 SF3 SF3 - -
μinch)
Ra Max. = 0.64 μm (25 SF2 SF2 SF6 SF6
μinch)
Ra Max. = 0.51 μm (20 SF1 SF1 SF5 SF5
μinch)
Ra Max. = 0.38 μm - - SF4 SF4
(15 μinch)

Internal surface finishes for investment cast bodies

Readings for Process Mechanically polished 2)

Contact Surfaces Hygiene class Code
DIN 11866
Ra ≤ 6.30 μm - 1500
Ra ≤ 0.80 μm H3 1502
Ra ≤ 0.60 μm 5) - 1507

Ra acc. to DIN EN ISO 4288 and ASME B46.1

1) Surface finishes of customized valve bodies may be limited in special cases.

2) Or any other finishing method that meets the Ra value (acc. to ASME BPE).

3) The smallest possible Ra finish for pipe connections with an internal pipe diameter < 6 mm is 0.38 µm.

4) When using these surfaces, the bodies are marked according to the specifications of ASME BPE.
The surfaces are only available for valve bodies which are made of materials (e.g. GEMÜ material codes 40, 41, F4, 44)) and use connec-
tions (e.g. GEMÜ connection codes 59, 80, 88) according to ASME BPE.

5) Not possible for GEMÜ connection code 59, DN 8 and GEMÜ connection code 0, DN 4.

GEMÜ 687 4 / 34 www.gemu-group.com

 Availabilities

Availability of valve bodies

Spigot
MG DN Connection type code 1)
0 16 17 18 35 36 37 55 59 60 63 64 65
2)
Material code
40, 40, C3 40, 40, 40, 40, C3 40, 40, C3 40, C3 40, 40, 40, 40,
42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42,
F4 F4 F4 F4 F4 F4 F4 F4 F4 F4 F4 F4 F4
10 10 - X X X X - X - - X - X X X X - X
15 X X X X X - X - - X - X X X X X X
20 - - - - - - - - - X X X - - - - -
25 15 X X X X X - X - - - - - X X X X X
20 X X X X X - X - - X X X X X X X X
25 X X X X X X X X X - X X X X X X X
40 32 X X X X X X X - X - - - X X X X X
40 X X X 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 X X X
65 - - - - - X - - X - - X - - - - -
80 65 - - - X - X X - X - - X - X X X X
80 - - - X - X X - X - - X - X X X X
100 100 - - - X - X X - X - - X - X X X X

MG = diaphragm size, X = standard

1) Connection type
Code 0: Spigot DIN
Code 16: Spigot DIN EN 10357 series B (2014 edition; formerly DIN 11850 series 1)
Code 17: Spigot EN 10357 series A/DIN 11866 series A formerly DIN 11850 series 2
Code 18: Spigot DIN 11850 series 3
Code 35: Spigot JIS-G 3447
Code 36: Spigot JIS-G 3459 schedule 10s
Code 37: Spigot SMS 3008
Code 55: Spigot BS 4825, part 1
Code 59: Spigot ASME BPE/DIN EN 10357 series C (from 2022 edition)/DIN 11866 series C
Code 60: Spigot ISO 1127/DIN EN 10357 series C (2014 edition)/DIN 11866 series B
Code 63: Spigot ANSI/ASME B36.19M schedule 10s
Code 64: Spigot ANSI/ASME B36.19M schedule 5s
Code 65: Spigot ANSI/ASME B36.19M schedule 40s

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code C3: 1.4435, investment casting
Code F4: 1.4539, forged body

www.gemu-group.com 5 / 34 GEMÜ 687

Availabilities

Threaded connection
MG DN Connection type code 1)
1 31 6, 6K
2)
Material code
37 37 40, 42
10 10 - - W
12 X - -
15 X - W
25 15 X X W
20 X X W
25 X X W
40 32 X X W
40 X X W
50 50 X X W
80 65 - - W
80 - - W

MG = diaphragm size, X = standard

W = welded assembly
1) Connection type
Code 1: Threaded socket DIN ISO 228
Code 31: NPT female thread
Code 6: Threaded spigot DIN 11851
Code 6K: Cone spigot and union nut DIN 11851

2) Valve body material

Code 37: 1.4408, investment casting
Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%

GEMÜ 687 6 / 34 www.gemu-group.com

 Availabilities

Flange
MG DN Connection type code 1)
8 34 38 39
2)
Material code
17, 18, 83 40, 42 C3 39 17, 18 3), 83 17, 18, 83 40, 42 C3
39 39 39
25 15 X X W W X - - X X W W
20 X X W W X X X X X W W
25 X X W W X X X X X W W
40 32 X X W W X - - X X W W
40 X X W W X X X X X W W
50 50 X X W W X X X X X W W
65 X - - - - X - X - - -
80 65 - - W - - - - - - W -
80 X X W - - X X X X W -
100 100 X X W - - X X X X W -

MG = diaphragm size, X = standard

W = welded assembly
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 34: Flange JIS B2220, 10K, RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body configura-
tion 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

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 39: 1.4408, PFA lined
Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code C3: 1.4435, investment casting

3) On request

www.gemu-group.com 7 / 34 GEMÜ 687

Availabilities

Clamp
MG DN Connection type code 1)
80, 8P 82 88, 8T 8A 8E
2)
Material code
40, 42, F4
10 10 - K - K -
15 K W K K -
20 K - K - -
25 15 - W - K -
20 K K K K -
25 K K K K K
40 32 - W - K K
40 K W K K K
50 50 K W K K K
65 W - W - W
80 65 K K K K K
80 K W K W K
100 100 W W W W W

MG = diaphragm size
K = connections completely machined (not welded)
W = welded assembly
1) Connection type
Code 80: Clamp ASME BPE, face-to-face dimension FTF ASME BPE, length only for body configuration D
Code 82: Clamp DIN 32676 series B, face-to-face dimension FTF EN 558 series 7, length only for body configuration D
Code 88: Clamp ASME BPE, for pipe ASME BPE, face-to-face dimension FTF EN 558 series 7, length only for body configuration D
Code 8A: Clamp DIN 32676 series A, face-to-face dimension FTF acc. to EN 558 series 7, length only for body configuration D
Code 8E: Clamp ISO 2852 for pipe ISO 2037, clamp SMS 3017 for pipe SMS 3008 face-to-face dimension FTF EN 558 series 7, length only
for body configuration D
Code 8P: Clamp DIN 32676 series C, face-to-face dimension FTF ASME BPE, length only for body configuration D
Code 8T: Clamp DIN 32676 series C, face-to-face dimension FTF EN 558 series 7, length only for body configuration D

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code F4: 1.4539, forged body

Availability of product conformity

Diaphragm material code 1) Body material code 2)
Food
3A 54, 5M -
Drinking water
Belgaqua (B) 28 37

1) Diaphragm material
Code 28: EPDM
Code 54: PTFE/EPDM one-piece
Code 5M: PTFE/EPDM two-piece

2) Valve body material

Code 37: 1.4408, investment casting

GEMÜ 687 8 / 34 www.gemu-group.com

 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 4 Connection type Code
Diaphragm valve, pneumatically operated, 687 Cone spigot and union nut DIN 11851 6K
plastic actuator, Flange
stainless steel distance piece
Flange EN 1092, PN 16, form B, 8
2 DN Code face-to-face dimension FTF EN 558 series 1, ISO 5752,
basic series 1,
DN 10 10 length only for body configuration D
DN 12 12 Flange JIS B2220, 10K, RF, 34
DN 15 15 face-to-face dimension FTF EN 558 series 1, ISO 5752,
DN 20 20 basic series 1,
length only for body configuration D
DN 25 25
Flange ANSI Class 150 RF, 38
DN 32 32
face-to-face dimension FTF MSS SP-88,
DN 40 40 length only for body configuration D
DN 50 50 Flange ANSI Class 125/150 RF, 39
DN 65 65 face-to-face dimension FTF EN 558 series 1, ISO 5752,
basic series 1,
DN 80 80
length only for body configuration D
DN 100 100
Clamp
3 Body configuration Code Clamp ASME BPE, 80
Tank bottom valve body B face-to-face dimension FTF ASME BPE,
length only for body configuration D
Body configuration code B: Dimensions and designs on
request Clamp DIN 32676 series B, 82
face-to-face dimension FTF EN 558 series 7,
2/2-way body D length only for body configuration D
T-body T Clamp ASME BPE, 88
Body configuration code T: Dimensions on request for pipe ASME BPE,
face-to-face dimension FTF EN 558 series 7,
4 Connection type Code length only for body configuration D
Spigot Clamp DIN 32676 series A, 8A
Spigot DIN 0 face-to-face dimension FTF acc. to EN 558 series 7,
length only for body configuration D
Spigot DIN EN 10357 series B (2014 edition; formerly 16
DIN 11850 series 1) Clamp ISO 2852 for pipe ISO 2037, 8E
clamp SMS 3017 for pipe SMS 3008
Spigot EN 10357 series A/DIN 11866 series A 17
face-to-face dimension FTF EN 558 series 7,
formerly DIN 11850 series 2
length only for body configuration D
Spigot DIN 11850 series 3 18
Clamp DIN 32676 series C, 8P
Spigot JIS-G 3447 35 face-to-face dimension FTF ASME BPE,
Spigot JIS-G 3459 schedule 10s 36 length only for body configuration D
Spigot SMS 3008 37 Clamp DIN 32676 series C, 8T
Spigot BS 4825, part 1 55 face-to-face dimension FTF EN 558 series 7,
length only for body configuration D
Spigot ASME BPE/DIN EN 10357 series C (from 2022 59
edition)/DIN 11866 series C 5 Valve body material Code
Spigot ISO 1127/DIN EN 10357 series C (2014 edition)/ 60 SG iron material
DIN 11866 series B
EN-GJS-400-18-LT (GGG 40.3), 17
Spigot ANSI/ASME B36.19M schedule 10s 63 PFA lined
Spigot ANSI/ASME B36.19M schedule 5s 64 EN-GJS-400-18-LT (GGG 40.3), 18
Spigot ANSI/ASME B36.19M schedule 40s 65 PP lined
Threaded connection EN-GJS-400-18-LT (GGG 40.3), 83
Threaded socket DIN ISO 228 1 hard rubber lined

NPT female thread 31 Investment casting material

Threaded spigot DIN 11851 6 1.4408, investment casting 37

www.gemu-group.com 9 / 34 GEMÜ 687

Order data

5 Valve body material Code 8 Actuator version Code

1.4408, PFA lined 39 DN 100, diaphragm size 100
1.4435, investment casting C3 Actuator size 5/N 5/N
Forged material Actuator size 5RN 5RN
1.4435 (F316L), forged body 40 Actuator size 7A 7A
1.4435 (BN2), forged body, Δ Fe < 0.5% 42 Actuator size 7A3 7A3
1.4539, forged body F4
9 Surface Code
6 Diaphragm material Code Ra ≤ 6.3 μm (250 μin.) for media wetted surfaces, 1500
Elastomer mechanically polished internal

FKM 4 Ra ≤ 0.8 µm (30 µin.) for media wetted surfaces, 1502

in accordance with DIN 11866 H3,
EPDM 13
mechanically polished internal
EPDM 17
Ra ≤ 0.8 µm (30 µin.) for media wetted surfaces, 1503
EPDM 19 in accordance with DIN 11866 HE3,
EPDM 28 electropolished internal/external
EPDM 29 Ra ≤ 0.6 μm (25 μin.) for media wetted surfaces, 1507
mechanically polished internal
PTFE
Ra ≤ 0.6 µm (25 µin.) for media wetted surfaces, 1508
PTFE/EPDM one-piece 54
electropolished internal/external
PTFE/EPDM two-piece 5M
Ra ≤ 0.25 µm (10 µin.) for media wetted surfaces *), 1516
PTFE/PVDF/EPDM three-piece 71 in accordance with DIN 11866 HE5,
Note: The PTFE/EPDM diaphragm (code 5M) is electropolished internal/external,
available from diaphragm size 25. *) for inner pipe diameters < 6 mm, in the spigot Ra ≤
Note: The PTFE/PVDF/EPDM diaphragm (code 71) can 0.38 µm
only be combined with PFA lined valve bodies. Ra ≤ 0.25 µm (10 µin.) for media wetted surfaces *), 1527
in accordance with DIN 11866 H5,
7 Control function Code mechanically polished internal,
Normally closed (NC) 1 *) for inner pipe diameters < 6 mm, in the spigot Ra ≤
0.38 µm
Normally open (NO) 2
Ra ≤ 0.4 µm (15 µin.) for media wetted surfaces, 1536
Double acting (DA) 3
in accordance with DIN 11866 H4,
mechanically polished internal
8 Actuator version Code
Ra ≤ 0.4 µm (15 µin.) for media wetted surfaces, 1537
DN 10–20, diaphragm size 10
in accordance with DIN 11866 HE4,
Actuator size B/N B/N electropolished internal/external
DN 15–25, diaphragm size 25 Ra max. 0.51 µm (20 µin.) for media wetted surfaces, SF1
Actuator size F/M F/M in accordance with ASME BPE SF1,
mechanically polished internal
Actuator size F/N F/N
Ra max. 0.64 µm (25 µin.) for media wetted surfaces, SF2
Actuator size FRM FRM
in accordance with ASME BPE SF2,
Actuator size FRN FRN mechanically polished internal
DN 32 - 40, diaphragm size 40 Ra max. 0.76 µm (30 µin.) for media wetted surfaces, SF3
Actuator size H/M H/M in accordance with ASME BPE SF3,
Actuator size H/N H/N mechanically polished internal

Actuator size HRM HRM Ra max. 0.38 µm (15 µin.) for media wetted surfaces, SF4
in accordance with ASME BPE SF4,
Actuator size HRN HRN
electropolished internal/external
DN 50–65, diaphragm size 50
Ra max. 0.51 µm (20 µin.) for media wetted surfaces, SF5
Actuator size J/M J/M in accordance with ASME BPE SF5,
Actuator size J/N J/N electropolished internal/external
Actuator size JRM JRM Ra max. 0.64 µm (25 µin.) for media wetted surfaces, SF6
in accordance with ASME BPE SF6,
Actuator size JRN JRN
electropolished internal/external
DN 65–80, diaphragm size 80
Actuator size 4/N 4/N 10 Special version Code
Actuator size 4RN 4RN Without
Actuator size 6A 6A BELGAQUA certification B
Actuator size 6A2 6A2 Special version for 3A M

GEMÜ 687 10 / 34 www.gemu-group.com

 Order data

10 Special version Code 11 CONEXO Code

Special version for oxygen, S Without
maximum medium temperature: 60 °C Integrated RFID chip for electronic identification and C
traceability

Order example
Ordering option Code Description
1 Type 687 Diaphragm valve, pneumatically operated,
plastic actuator,
stainless steel distance piece
2 DN 25 DN 25
3 Body configuration D 2/2-way body
4 Connection type 60 Spigot ISO 1127/DIN EN 10357 series C (2014 edition)/DIN 11866
series B
5 Valve body material 40 1.4435 (F316L), forged body
6 Diaphragm material 5M PTFE/EPDM two-piece
7 Control function 1 Normally closed (NC)
8 Actuator version F/N Actuator size F/N
9 Surface 1503 Ra ≤ 0.8 µm (30 µin.) for media wetted surfaces,
in accordance with DIN 11866 HE3,
electropolished internal/external
10 Special version M Special version for 3A
11 CONEXO Without

www.gemu-group.com 11 / 34 GEMÜ 687

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.
For special oxygen version (code S): only gaseous oxygen

Control medium: Inert gases

Temperature
Media temperature: Diaphragm material Standard Special version
for oxygen
EPDM (code 3A/13) -10 — 100 °C 0 — 60 °C
FKM (code 4/4A) -10 — 90 °C -
EPDM (code 17) -10 — 100 °C -
EPDM (code 19) -10 — 100 °C 0 — 60 °C
EPDM (code 28) -10 — 85 °C -
EPDM (code 29) -10 — 100 °C -
PTFE/EPDM (code 54) -10 — 100 °C 0 — 60 °C
PTFE/PVDF/EPDM (code 71) -10 — 100 °C -
PTFE/EPDM (code 5M) -10 — 100 °C 0 — 60 °C

Sterilization temperature: EPDM (code 3A/13) max. 150 °C, max. 60 min per cycle
FKM (code 4/4A) not applicable
EPDM (code 17) max. 150 °C, max. 180 min per cycle
EPDM (code 19) max. 150 °C, max. 180 min per cycle
EPDM (code 28) not applicable
EPDM (code 29) not applicable
PTFE/EPDM (code 54) max. 150 °C, constant temperature per cycle
PTFE/PVDF/EPDM (code not applicable
71)
PTFE/EPDM (code 5M) max. 150 °C, constant temperature per cycle
The sterilization temperature is only valid for steam (saturated steam) or superheated water.
If the sterilization temperatures listed above are applied to the EPDM diaphragms for longer periods of time, the
service life of the diaphragms will be reduced. In these cases, maintenance cycles must be adapted accord-
ingly.
PTFE diaphragms can also be used as steam barriers; however, this will reduce their service life. This also ap-
plies to PTFE diaphragms exposed to high temperature fluctuations. The maintenance cycles must be adapted
accordingly. GEMÜ 555 and 505 globe valves are particularly suitable for use in the area of steam generation
and distribution. The following valve arrangement for interfaces between steam pipes and process pipes has
proven itself over time: A globe valve for shutting off steam pipes and a diaphragm valve as an interface to the
process pipes.

Steam input

Process pipe

Steam distribution Sterile process

Ambient temperature: 0 — 60 °C

Control medium temper- 0 — 40 °C

ature:

Storage temperature: 0 — 40 °C

GEMÜ 687 12 / 34 www.gemu-group.com

 Technical data

Pressure
Operating pressure: MG DN Actuator ver- Control function 1 Control function 2 + 3
sion code Diaphragm material
EPDM/FKM PTFE EPDM/FKM PTFE
10 10, 15, 20 B/N 0 - 10 0-6 0-6 0-6
25 15, 20, 25 F/M, FRM 0-6 0-6 - -
F/N, FRN 0 - 10 0 - 10 0 - 10 0 - 10
40 32, 40 H/M, HRM 0-6 0-6 - -
H/N, HRN 0 - 10 0 - 10 0 - 10 0 - 10
50 50, 65 J/M, JRM 0-6 0-6 - -
J/N, JRN 0 - 10 0 - 10 0 - 10 0 - 10
80 65, 80 4/N, 4RN 0-8 0-5 0-8 0-6
6A - - - 0 - 10
6A2 - 0 - 10 - -
100 100 5/N, 5RN 0-6 0-4 0-6 0-4
7A - - - 0 - 10
7A3 - 0 - 10 - -

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 to P11/P12 EN 12266-1

Control pressure: MG DN Actuator ver- Control func- Control func- Control func-
sion code tion 1 tion 2 tion 3
10 10, 15, 20 B/N 3.5 - 7.0 max. 6.0 max. 5.0
25 15, 20, 25 F/M, FRM 3.8 - 6.0 - -
F/N, FRN 5.5 - 7.0 max. 5.5 max. 5.5
40 32, 40 H/M, HRM 3.8 - 6.0 - -
H/N, HRN 5.5 - 7.0 max. 5.5 max. 5.5
50 50, 65 J/M, JRM 3.8 - 6.0 - -
J/N, JRN 5.5 - 7.0 max. 5.0 max. 5.0
80 65, 80 4/N, 4RN 5.5 - 7.0 max. 5.0 max. 4.5
6A - max. 3.0 max. 3.0
6A2 4.0 - 7.0 - -
100 100 5/N, 5RN 5.5 - 7.0 max. 5.0 max. 4.5
7A - max. 3.5 max. 3.5
7A3 4.5 - 7.0 - -

MG = diaphragm size
All pressures are gauge pressures.

www.gemu-group.com 13 / 34 GEMÜ 687

Technical data

Control pressure: GEMÜ 687: Control pressure/operating pressure diagram – Control function 2 and 3

PTFE diaphragm
6

Control pressure [bar]

6

Control pressure [bar]

MG 10
5 5
MG 25
4 4
MG 100
3 3 MG 40

2 MG 80
2
MG 50
1 1
0 0
0 2 4 6 8 10 0 2 4 6 8 10
Operating pressure [bar] Operating pressure [bar]
Elastomer diaphragm
6
Control pressure [bar]

Control pressure [bar]

MG 10
5 5
4 4
MG 100 MG 80 MG 25 MG 40
3 3
2 2
1 MG 50
1
0 0
0 2 4 6 8 10 0 2 4 6 8 10
Operating pressure [bar] Operating pressure [bar]
The control pressure depending on the prevailing operating pressure, as shown in the diagram, is intended as a
guide for operating the system with low wear on the diaphragm.

Filling volume: Actuator version (code) Control function 1 Control function 2

B/N 0.03 0.02
F/M, FRM 0.20 -
F/N, FRN 0.20 0.16
H/M, HRM 0.42 -
H/N, HRN 0.42 0.40
J/M, HRM 0.79 -
J/N, JRN 0.79 0.69
4/N, 4RN 2.30 1.87
5/N, 5RN 2.30 2.00

Filling volume in dm³

C.f. 3 = for filling volume in open position see c.f. 1, for filling volume in closed position see c.f. 2

GEMÜ 687 14 / 34 www.gemu-group.com

 Technical data

Kv values: MG DN Connection type code

0 16 17 18 37 59 60 1 31
10 10 - 2.4 2.4 2.4 - 2.2 3.3 - -
12 - - - - - - - 3.2 -
15 3.3 3.8 3.8 3.8 - 2.2 4.0 3.4 -
20 - - - - - 3.8 - - -
25 15 4.1 4.7 4.7 4.7 - - 7.4 6.5 6.5
20 6.3 7.0 7.0 7.0 - 4.4 13.2 10.0 10.0
25 13.9 15.0 15.0 15.0 12.6 12.2 16.2 14.0 14.0
40 32 25.3 27.0 27.0 27.0 26.2 - 30.0 26.0 26.0
40 29.3 30.9 30.9 30.9 30.2 29.5 32.8 33.0 33.0
50 50 46.5 48.4 48.4 48.4 51.7 50.6 55.2 60.0 60.0
65 - - - - 62.2 61.8 - - -
80 65 - - 77.0 - 68.5 68.5 96.0 - -
80 - - 111.0 - 80.0 87.0 111.0 - -
100 100 - - 194.0 - 173.0 188.0 214.0 - -

MG = diaphragm size
Kv values in m³/h
Kv values determined in accordance with DIN EN 60534 standard, inlet pressure 5 bar, Δp 1 bar, stainless steel
valve body 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 tightening torques. Therefore the Kv values may exceed the tolerance limits of the stand-
ard.
The Kv value curve (Kv value dependent on valve stroke) can vary depending on the diaphragm material and dur-
ation of use.
MG DN GGG 40.3 PFA/PP Hard rubber
connection type 1,
31
25 15 8.0 5.0 6.0
20 11.5 9.0 11.0
25 11.5 13.0 15.0
40 32 28.0 23.0 29.0
40 28.0 26.0 32.0
50 50 60.0 47.0 64.0
65 - 47,0 -
80 80 - 110.0 128.0
100 100 - 177.0 190.0

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.

www.gemu-group.com 15 / 34 GEMÜ 687

Technical data

Product conformity
Machinery Directive: 2006/42/EC

Pressure Equipment Dir- 2014/68/EU

ective:

Food: Regulation (EC) No. 1935/2006

Regulation (EC) No. 10/2011*
FDA*
USP* Class VI

Drinking water: Belgaqua*

* depending on version and/or operating parameters

SIL: Product description: GEMÜ diaphragm valve 687

Type of valve: A
Safety function: Due to the safety function, the diaphragm valve is placed
in the closed position (with control function 1) or in the
open position (with control function 2).
HFT (Hardware Fault Tolerance): 0
MTTR (Mean Time To Restoration): 24 hours

Mechanical data
Weight: Actuator

MG DN Actuator version Control function Control function

(code) 1 2 and 3
10 10, 15, 20 B/N 0.53 -
25 15, 20, 25 F/M, F/N, FRM, 2.2 1.7
FRN
40 32, 40 H/M, H/N, HRM, 4.7 3.1
HRN
50 50, 65 J/M, J/N, JRM, 6.9 5.2
JRN
80 65, 80 4/N, 4RN 15.0 -
65, 80 6A - -
65, 80 6A2 52.0 -
100 100 5/N, 5RN 16.1 -
100 7A - -
100 7A3 63.0 -

Weights in kg
MG = diaphragm size

GEMÜ 687 16 / 34 www.gemu-group.com

 Technical data

Weight: Body

MG DN Spigot Threaded Threaded Flange Clamp

socket spigot, cone
spigot
Connection type code
0, 16, 17, 18, 1, 31 6, 6K 8, 38, 39 80, 82, 88,
35, 36, 37, 8A , 8E, 8P,
55, 59, 60, 8T
63, 64, 65
10 10 0.30 - 0.33 - 0.30
12 - 0.17 - - -
15 0.30 0.26 0.35 - 0.43
20 - - - - 0.43
25 15 0.62 0.32 0.71 1.50 0.75
20 0.58 0.34 0.78 2.20 0.71
25 0.55 0.39 0.79 2.80 0.63
40 32 1.45 0.88 1.66 3.40 1.62
40 1.32 0.93 1.62 4.50 1.50
50 50 2.25 1.56 2.70 6.30 2.50
65 2.20 - - 10.30 2.30
80 65 8.60 - 9.22 10.20 8.90
80 8.00 - 9.20 13.80 8.50
100 100 24.10 - - 20.80 24.80

Weights in kg
MG = diaphragm size

Installation position: Optional

Observe the angle of rotation for optimized draining when it comes to installation.
See separate document, "Angle of rotation technical information".

www.gemu-group.com 17 / 34 GEMÜ 687

Dimensions

Dimensions
Actuator dimensions
Actuator - Control function 1
Control function 1 – diaphragm size 10 Control function 1 – diaphragm size 25–50
Actuator size B/N Actuator sizes
ØB F/M, F/N, FRM, FRN, H/M, H/N, HRM, HRN, J/M, J/N, JRM, JRN
B1 ØB
A
CT*
G

A
CT*
A1

A1
Control function 1 – diaphragm size 80 Control function 1 – diaphragm size 100
Actuator sizes Actuator sizes
4/N, 4RN, 6A2 5/N, 5RN, 7A3
B B

A
G

CT
CT*
G

A1
A
A1

MG Actuator size øB A A1 B1 G
10 B/N 67.0 125.0 62.0 44.0 G 1/4
25 F/M, F/N, FRM, 130.0 170.0 59.0 - G 1/4
FRN
40 H/M, H/N, HRM, 171.0 208.0 75.0 - G 1/4
HRN
50 J/M, J/N, JRM, 211.0 244.0 90.0 - G 1/4
JRN
80 4/N, 4RN 259.0 368.0 173.0 - G 1/4
6A2 360.0 475.0 158.0 - G 1/4
100 5/N, 5RN 259.0 372.0 169.0 - G 1/4
7A3 360.0 477.0 154.0 - G 1/4

Dimensions in mm
MG = diaphragm size
* CT = A + H1 (see body dimensions)

GEMÜ 687 18 / 34 www.gemu-group.com

 Dimensions

Actuator - Control function 2 and 3

Control function 2 + 3 – diaphragm size 10 Control function 2 + 3 – diaphragm size 25–50
Actuator size B/N Actuator sizes
F/M, F/N, FRM, FRN, H/M, H/N, HRM, HRN, J/M, J/N, JRM, JRN
ØB
B2
ØB B1

G
G

A2
A2
A

A
CT*

CT*
A1
A1

Control function 2 + 3 – diaphragm size 80 Control function 2 + 3 – diaphragm size 100

Actuator sizes Actuator sizes
4/N, 4RN, 6A2 5/N, RN, 7A3
ØB B
G
G

A2
A2

A
G

A
CT*

CT
A1
A1

MG Actuator øB A A1 A2 B1 B2 G
size
10 B/N 57.0 110.0 49.0 30.0 35.0 68.0 G 1/4
25 F/M, F/N, 130.0 147.0 59.0 39.0 - - G 1/4
FRM, FRN
40 H/M, H/N, 171.0 173.0 75.0 42.0 - - G 1/4
HRM, HRN
50 J/M, J/N, 211.0 206.0 90.0 47.0 - - G 1/4
JRM, JRN
80 4/N, 4RN 258.0 282.0 170.0 45.0 - - G 1/4
6A 360.0 323.0 158.0 110.0 - - G 1/4
100 5/N, 5RN 258.0 278.0 165.0 45.0 - - G 1/4
7A 360.0 319.0 154.0 110.0 - - G 1/4

Dimensions in mm
MG = diaphragm size
* CT = A + H1 (see body dimensions)

www.gemu-group.com 19 / 34 GEMÜ 687

Dimensions

Body dimensions
Spigot DIN/EN/ISO (code 0, 16, 17, 18, 60)
c
H1

ød
s
L

Connection type spigot DIN/EN/ISO (code 0, 16, 17, 18, 60) 1), forged material (code 40, 42, F4) 2)

MG DN NPS c (min) ød H1 L s
Connection type Connection type
0 16 17 18 60 0 16 17 18 60
10 10 3/8" 25.0 - 12.0 13.0 14.0 17.2 12.5 108.0 - 1.0 1.5 2.0 1.6
15 1/2" 25.0 18.0 18.0 19.0 20.0 21.3 12.5 108.0 1.5 1.0 1.5 2.0 1.6
25 15 1/2" 25.0 18.0 18.0 19.0 20.0 21.3 19.0 120.0 1.5 1.0 1.5 2.0 1.6
20 3/4" 25.0 22.0 22.0 23.0 24.0 26.9 19.0 120.0 1.5 1.0 1.5 2.0 1.6
25 1" 25.0 28.0 28.0 29.0 30.0 33.7 19.0 120.0 1.5 1.0 1.5 2.0 2.0
40 32 1¼" 25.0 34.0 34.0 35.0 36.0 42.4 26.0 153.0 1.5 1.0 1.5 2.0 2.0
40 1½" 30.5 40.0 40.0 41.0 42.0 48.3 26.0 153.0 1.5 1.0 1.5 2.0 2.0
50 50 2" 30.0 52.0 52.0 53.0 54.0 60.3 32.0 173.0 1.5 1.0 1.5 2.0 2.0
80 65 2½" 30.0 - - 70.0 - 76.1 62.0 216.0 - - 2.0 - 2.0
80 3" 30.0 - - 85.0 - 88.9 62.0 254.0 - - 2.0 - 2.3
100 100 4" 30.0 - - 104.0 - 114.3 76.0 305.0 - - 2.0 - 2.3

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 0: Spigot DIN
Code 16: Spigot DIN EN 10357 series B (2014 edition; formerly DIN 11850 series 1)
Code 17: Spigot EN 10357 series A/DIN 11866 series A formerly DIN 11850 series 2
Code 18: Spigot DIN 11850 series 3
Code 60: Spigot ISO 1127/DIN EN 10357 series C (2014 edition)/DIN 11866 series B

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code F4: 1.4539, forged body

GEMÜ 687 20 / 34 www.gemu-group.com

 Dimensions

c
H1

ød
s
L

Connection type spigot DIN/EN/ISO (code 0, 17, 60) 1), investment casting material (code C3) 2)

MG DN NPS c (min) ød H1 L s
Connection type Connection type
0 17 60 0 17 60
10 10 3/8" 25.0 - 13.0 17.2 12.5 108.0 - 1.5 1.6
15 1/2" 25.0 - 19.0 21.3 12.5 108.0 - 1.5 1.6
25 15 1/2" 25.0 - 19.0 21.3 13.0 120.0 - 1.5 1.6
20 3/4" 25.0 - 23.0 26.9 16.0 120.0 - 1.5 1.6
25 1" 25.0 - 29.0 33.7 19.0 120.0 - 1.5 2.0
40 32 1¼" 25.0 - 35.0 42.4 24.0 153.0 - 1.5 2.0
40 1½" 30.5 - 41.0 48.3 26.0 153.0 - 1.5 2.0
50 50 2" 30.0 - 53.0 60.3 32.0 173.0 - 1.5 2.0

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 0: Spigot DIN
Code 17: Spigot EN 10357 series A/DIN 11866 series A formerly DIN 11850 series 2
Code 60: Spigot ISO 1127/DIN EN 10357 series C (2014 edition)/DIN 11866 series B

2) Valve body material

Code C3: 1.4435, investment casting

www.gemu-group.com 21 / 34 GEMÜ 687

Dimensions

Spigot ASME/BS (code 55, 59, 63, 64, 65)

c
H1

ød
s
L

Connection type spigot ASME/BS (code 55, 59, 63, 64, 65) 1), forged material (code 40, 42, F4) 2)

MG DN NPS c (min) ød H1 L s
Connection type Connection type
55 59 63 64 65 55 59 63 64 65
10 10 3/8" 25.0 9.53 9.53 17.1 - 17.1 12.5 108.0 1.2 0.89 1.65 - 2.31
15 1/2" 25.0 12.70 12.70 21.3 21.3 21.3 12.5 108.0 1.2 1.65 2.11 1.65 2.77
20 3/4" 25.0 19.05 19.05 - - - 12.5 108.0 1.2 1.65 - - -
25 15 1/2" 25.0 - - 21.3 21.3 21.3 19.0 120.0 - - 2.11 1.65 2.77
20 3/4" 25.0 19.05 19.05 26.7 26.7 26.7 19.0 120.0 1.2 1.65 2.11 1.65 2.87
25 1" 25.0 - 25.40 33.4 33.4 33.4 19.0 120.0 - 1.65 2.77 1.65 3.38
40 32 1¼" 25.0 - - 42.2 42.2 42.2 26.0 153.0 - - 2.77 1.65 3.56
40 1½" 30.5 - 38.10 48.3 48.3 48.3 26.0 153.0 - 1.65 2.77 1.65 3.68
50 50 2" 30.0 - 50.80 60.3 60.3 60.3 32.0 173.0 - 1.65 2.77 1.65 3.91
65 2½" 30.0 - 63.50 - - - 34.0 173.0 - 1.65 - - -
80 65 2½" 30.0 - 63.50 73.0 73.0 73.0 62.0 216.0 - 1.65 3.05 2.11 5.16
80 3" 30.0 - 76.20 88.9 88.9 88.9 62.0 254.0 - 1.65 3.05 2.11 5.49
100 100 4" 30.0 - 101.60 114.3 114.3 114.3 76.0 305.0 - 2.11 3.05 2.11 6.02

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 55: Spigot BS 4825, part 1
Code 59: Spigot ASME BPE/DIN EN 10357 series C (from 2022 edition)/DIN 11866 series C
Code 63: Spigot ANSI/ASME B36.19M schedule 10s
Code 64: Spigot ANSI/ASME B36.19M schedule 5s
Code 65: Spigot ANSI/ASME B36.19M schedule 40s

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code F4: 1.4539, forged body

GEMÜ 687 22 / 34 www.gemu-group.com

 Dimensions

c
H1

ød
s
L

Connection type spigot ASME BPE (code 59) 1), investment casting material (code C3) 2)

MG DN NPS c (min) ød H1 L s
10 20 3/4" 25.0 19.05 12.5 108.0 1.65
25 20 3/4" 25.0 19.05 16.0 120.0 1.65
25 1" 25.0 25.40 19.0 120.0 1.65
40 40 1½" 30.5 38.10 26.0 153.0 1.65
50 50 2" 30.0 50.80 32.0 173.0 1.65

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 59: Spigot ASME BPE/DIN EN 10357 series C (from 2022 edition)/DIN 11866 series C

2) Valve body material

Code C3: 1.4435, investment casting

www.gemu-group.com 23 / 34 GEMÜ 687

Dimensions

Spigot JIS/SMS (code 35, 36, 37)

c
H1

ød
s
L

Connection type spigot JIS/SMS (code 35, 36, 37) 1), forged material (code 40, 42, F4) 2)

MG DN NPS c (min) ød H1 L s
Connection type Connection type
35 36 37 35 36 37
10 10 3/8" 25.0 - 17.3 - 12.5 108.0 - 1.65 -
15 1/2" 25.0 - 21.7 - 12.5 108.0 - 2.10 -
25 15 1/2" 25.0 - 21.7 - 19.0 120.0 - 2.10 -
20 3/4" 25.0 - 27.2 - 19.0 120.0 - 2.10 -
25 1" 25.0 25.4 34.0 25.0 19.0 120.0 1.2 2.80 1.2
40 32 1¼" 25.0 31.8 42.7 33.7 26.0 153.0 1.2 2.80 1.2
40 1½" 30.5 38.1 48.6 38.0 26.0 153.0 1.2 2.80 1.2
50 50 2" 30.0 50.8 60.5 51.0 32.0 173.0 1.5 2.80 1.2
65 2½" 30.0 63.5 - 63.5 34.0 173.0 2.0 - 1.6
80 65 2½" 30.0 63.5 76.3 63.5 62.0 216.0 2.0 3.00 1.6
80 3" 30.0 76.3 89.1 76.1 62.0 254.0 2.0 3.00 1.6
100 100 4" 30.0 101.6 114.3 101.6 76.0 305.0 2.0 3.00 2.0

Connection type spigot SMS (code 37) 1), investment casting material (code C3) 2)

MG DN NPS c (min) ød H1 L s
25 25 1" 25.0 25.0 19.0 120.0 1.2
40 40 1½" 30.5 38.0 26.0 153.0 1.2
50 50 2" 30.0 51.0 32.0 173.0 1.2

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 35: Spigot JIS-G 3447
Code 36: Spigot JIS-G 3459 schedule 10s
Code 37: Spigot SMS 3008

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code C3: 1.4435, investment casting
Code F4: 1.4539, forged body

GEMÜ 687 24 / 34 www.gemu-group.com

 Dimensions

Threaded socket DIN (code 1)

H1

R
H

SW2
t
L

Connection type threaded socket (code 1) 1), investment casting material (code 37) 2)

MG DN NPS H H1 L n R SW 2 t
10 12 3/8" 25.0 13.0 55.0 2 G 3/8 22.0 12.0
15 1/2" 30.0 15.0 68.0 2 G 1/2 27.0 15.0
25 15 1/2" 28.3 14.8 85.0 6 G 1/2 27.0 15.0
20 3/4" 33.3 17.3 85.0 6 G 3/4 32.0 16.0
25 1" 42.3 21.8 110.0 6 G1 41.0 13.0
40 32 1¼" 51.3 26.3 120.0 8 G 1¼ 50.0 20.0
40 1½" 56.3 28.8 140.0 8 G 1½ 55.0 18.0
50 50 2" 71.3 36.0 165.0 8 G2 70.0 26.0

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 37: 1.4408, investment casting

Threaded socket NPT (code 31)

H1

R
H

SW2
t
L

Connection type threaded socket NPT (code 31) 1), investment casting material (code 37) 2)

MG DN NPS H H1 L n R SW 2 t
25 15 1/2" 28.3 14.8 85.0 6 NPT 1/2 27.0 14.0
20 3/4" 33.3 17.3 85.0 6 NPT 3/4 32.0 14.0
25 1" 42.3 21.8 110.0 6 NPT 1 41.0 17.0
40 32 1¼" 51.3 26.3 120.0 8 NPT 1¼ 50.0 17.0
40 1½" 56.3 28.8 140.0 8 NPT 1½ 55.0 17.0
50 50 2" 71.3 36.3 165.0 8 NPT 2 70.0 18.0

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

2) Valve body material

Code 37: 1.4408, investment casting

www.gemu-group.com 25 / 34 GEMÜ 687

Dimensions

Threaded spigot DIN (code 6)

H1

ød1
R
L

Connection type threaded spigot DIN (code 6) 1), forged material (code 40, 42) 2)

MG DN NPS ød1 H1 L R
10 10 3/8" 10.0 12.5 118.0 Rd 28 x 1/8
15 1/2" 16.0 12.5 118.0 Rd 34 x 1/8
25 15 1/2" 16.0 19.0 118.0 Rd 34 x 1/8
20 3/4" 20.0 19.0 118.0 Rd 44 x 1/6
25 1" 26.0 19.0 128.0 Rd 52 x 1/6
40 32 1¼" 32.0 26.0 147.0 Rd 58 x 1/6
40 1½" 38.0 26.0 160.0 Rd 65 x 1/6
50 50 2" 50.0 32.0 191.0 Rd 78 x 1/6
80 65 2½" 66.0 62.0 246.0 Rd 95 x 1/6
80 3" 81.0 62.0 256.0 Rd 110 x 1/4

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 6: Threaded spigot DIN 11851

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%

GEMÜ 687 26 / 34 www.gemu-group.com

 Dimensions

Cone spigot DIN (code 6K)

H1
ød1
R

Connection type cone spigot DIN (code 6K) 1), forged material (code 40, 42) 2)

MG DN NPS ød1 H1 L R
10 10 3/8" 10.0 12.5 116.0 Rd 28 x 1/8
15 1/2" 16.0 12.5 116.0 Rd 34 x 1/8
25 15 1/2" 16.0 19.0 116.0 Rd 34 x 1/8
20 3/4" 20.0 19.0 114.0 Rd 44 x 1/6
25 1" 26.0 19.0 127.0 Rd 52 x 1/6
40 32 1¼" 32.0 26.0 147.0 Rd 58 x 1/6
40 1½" 38.0 26.0 160.0 Rd 65 x 1/6
50 50 2" 50.0 32.0 191.0 Rd 78 x 1/6
80 65 2½" 66.0 62.0 246.0 Rd 95 x 1/6
80 3" 81.0 62.0 256.0 Rd 110 x 1/4

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 6K: Cone spigot and union nut DIN 11851

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%

www.gemu-group.com 27 / 34 GEMÜ 687

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, 83), investment casting material (code 39,
C3), forged material (code 40, 42) 2)

MG DN NPS øD FTF H1 øk øL n
Material Material
17, 18, 83 C3 40, 42 17, 18, 83 C3 40, 42
39 39
25 15 1/2" 95.0 150.0 130.0 150.0 150.0 18.0 18.0 13.0 19.0 65.0 14.0 4
20 3/4" 105.0 150.0 150.0 150.0 150.0 20.5 20.5 16.0 19.0 75.0 14.0 4
25 1" 115.0 160.0 160.0 160.0 160.0 23.0 23.0 19.0 19.0 85.0 14.0 4
40 32 1¼" 140.0 180.0 180.0 180.0 180.0 28.7 28.7 24.0 26.0 100.0 19.0 4
40 1½" 150.0 200.0 200.0 200.0 200.0 33.0 33.0 26.0 26.0 110.0 19.0 4
50 50 2" 165.0 230.0 230.0 230.0 230.0 39.0 39.0 32.0 32.0 125.0 19.0 4
65 2½" 185.0 290.0 - - - 51.0 - - - 145.0 19.0 4
80 65 2½" 185.0 - - - 290.0 - - - 62.0 145.0 19.0 4
80 3" 200.0 310.0 310.0 - 310.0 59.5 59.5 - 62.0 160.0 19.0 8
100 100 4" 220.0 350.0 350.0 - 350.0 73.0 73.0 - 76.0 180.0 19.0 8

Dimensions in mm
MG = diaphragm size
n = number of bolts
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 39: 1.4408, PFA lined
Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code C3: 1.4435, investment casting

GEMÜ 687 28 / 34 www.gemu-group.com

 Dimensions

Flange JIS (code 34)

ØL
H1

ØD
øk
FTF

Connection type flange, length 558 (code 34) 1), investment casting material (code 39) 2)

MG DN NPS øD FTF H1 øk øL n
25 15 1/2" 95.0 130.0 18.0 70.0 15.0 4
20 3/4" 100.0 150.0 20.5 75.0 15.0 4
25 1" 125.0 160.0 23.0 90.0 19.0 4
40 32 1¼ 135.0 180.0 28.7 100.0 19.0 4
40 1½" 140.0 200.0 33.0 105.0 19.0 4
50 50 2" 155.0 230.0 39.0 120.0 19.0 4

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 34: Flange JIS B2220, 10K, RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1, length only for body configura-
tion D

2) Valve body material

Code 39: 1.4408, PFA lined

www.gemu-group.com 29 / 34 GEMÜ 687

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, 83), investment casting material (code
39) 2)

MG DN NPS øD FTF H1 øk øL n
Material
17, 18, 39 83
25 20 3/4" 100.0 146.0 146.4 20.5 69.9 15.9 4
25 1" 110.0 146.0 146.4 23.0 79.4 15.9 4
40 40 1½" 125.0 175.0 171.4 33.0 98.4 15.9 4
50 50 2" 150.0 200.0 197.4 39.0 120.7 19.0 4
65 2½" 180.0 226.0 - 51.0 139.7 19.0 4
80 80 3" 190.0 260.0 260.4 59.5 152.4 19.0 4
100 100 4" 230.0 327.0 324.4 73.0 190.5 19.0 8

Dimensions in mm
MG = diaphragm size
n = number of bolts
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 39: 1.4408, PFA lined
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined

GEMÜ 687 30 / 34 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, 83), investment casting material (code 39,
C3), forged material (code 40, 42) 2)

MG DN NPS øD FTF H1 øk øL n
Material Material
17, 18, 83 C3 40, 42 17, 18, 83 C3 40, 42
39 39
25 15 1/2" 90.0 130.0 130.0 150.0 150.0 18.0 18.0 13.0 19.0 60.3 15.9 4
20 3/4" 100.0 150.0 150.0 150.0 150.0 20.5 20.5 16.0 19.0 69.9 15.9 4
25 1" 110.0 160.0 160.0 160.0 160.0 23.0 23.0 19.0 19.0 79.4 15.9 4
40 32 1¼" 115.0 180.0 180.0 180.0 180.0 28.7 28.7 24.0 26.0 88.9 15.9 4
40 1½" 125.0 200.0 200.0 200.0 200.0 33.0 33.0 26.0 26.0 98.4 15.9 4
50 50 2" 150.0 230.0 230.0 230.0 230.0 39.0 39.0 32.0 32.0 120.7 19.0 4
65 2½" 180.0 290.0 - - 290.0 51.0 - - - 139.7 19.0 4
80 65 2½" 180.0 - - - 290.0 - - - 62.0 139.7 19.0 4
80 3" 190.0 310.0 310.0 - 310.0 59.5 59.5 - 62.0 152.4 19.0 4
100 100 4" 230.0 350.0 350.0 - 350.0 73.0 73.0 - 76.0 190.5 19.0 8

Dimensions in mm
MG = diaphragm size
n = number of bolts
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 39: 1.4408, PFA lined
Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
Code C3: 1.4435, investment casting

www.gemu-group.com 31 / 34 GEMÜ 687

Dimensions

Clamp (code 80, 82, 88, 8A, 8E, 8P, 8T)

H1

ød3
ød1
L

Connection type clamp DIN/ASME (code 80, 88, 8P, 8T) 1), forged material (code 40, 42, F4) 2)

MG DN NPS ød1 ød3 H1 L

Connection type Connection type Connection type
80, 8P 88, 8T 80, 8P 88, 8T 80, 8P 88, 8T
10 15 1/2" 9.40 940 25.0 25.0 12.5 88.9 108.0
20 3/4" 15.75 15.75 25.0 25.0 12.5 101.6 117.0
25 20 3/4" 15.75 15.75 25.0 250 19.0 101.6 117.0
25 1" 22.10 22.10 50.5 50.5 19.0 114.3 127.0
40 40 1½" 34.80 34.80 50.5 50.5 26.0 139.7 159.0
50 50 2" 47.50 47.50 64.0 64.0 32.0 158.8 190.0
65 2½" 60.20 60.20 77.5 77.5 34.0 193.8 216.0
80 65 2½" 60.20 60.20 77.5 77.5 62.0 193.8 216.0
80 3" 72.90 72.90 91.0 91.0 62.0 222.3 254.0
100 100 4" 97.38 97.38 119.0 119.0 76.0 292.1 305.0

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 80: Clamp ASME BPE, face-to-face dimension FTF ASME BPE, length only for body configuration D
Code 88: Clamp ASME BPE, for pipe ASME BPE, face-to-face dimension FTF EN 558 series 7, length only for body configuration D
Code 8P: Clamp DIN 32676 series C, face-to-face dimension FTF ASME BPE, length only for body configuration D
Code 8T: Clamp DIN 32676 series C, face-to-face dimension FTF EN 558 series 7, length only for body configuration D

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code F4: 1.4539, forged body

GEMÜ 687 32 / 34 www.gemu-group.com

H1 Dimensions

ød3
ød1
L

Connection type clamp DIN/ISO (code 82, 8A, 8E) 1), forged material (code 40, 42, F4) 2)

MG DN NPS ød1 ød3 H1 L

Connection type Connection type Connection type
82 8A 8E 82 8A 8E 82 8A 8E
10 10 3/8" 14.0 10.0 - 25.0 34.0 - 12.5 108.0 108.0 -
15 1/2" 18.1 16.0 - 50.5 34.0 - 12.5 108.0 108.0 -
25 15 1/2" 18.1 16.0 - 50.5 34.0 - 19.0 108.0 108.0 -
20 3/4" 23.7 20.0 - 50.5 34.0 - 19.0 117.0 117.0 -
25 1" 29.7 26.0 22.6 50.5 50.5 50.5 19.0 1270 127.0 127.0
40 32 1¼" 38.4 32.0 31.3 64.0 50.5 50.5 26.0 146.0 146.0 146.0
40 1½" 44.3 38.0 35.6 64.0 50.5 50.5 26.0 159.0 159.0 159.0
50 50 2" 56.3 50.0 48.6 77.5 64.0 64.0 32.0 190.0 190.0 190.0
65 2½" - - 60.3 - - 77.5 34.0 - - 216.0
80 65 2½" 72.1 66.0 60.3 91.0 91.0 77.5 62.0 216.0 216.0 216.0
80 3" 84.3 81.0 72.9 106.0 106.0 91.0 62.0 254.0 254.0 254.0
100 100 4" 109.7 100.0 97.6 130.0 119.0 119.0 76.0 305.0 305.0 305.0

Dimensions in mm
MG = diaphragm size
1) Connection type
Code 82: Clamp DIN 32676 series B, face-to-face dimension FTF EN 558 series 7, length only for body configuration D
Code 8A: Clamp DIN 32676 series A, face-to-face dimension FTF acc. to EN 558 series 7, length only for body configuration D
Code 8E: Clamp ISO 2852 for pipe ISO 2037, clamp SMS 3017 for pipe SMS 3008 face-to-face dimension FTF EN 558 series 7, length only
for body configuration D

2) Valve body material

Code 40: 1.4435 (F316L), forged body
Code 42: 1.4435 (BN2), forged body, Δ Fe < 0.5%
Code F4: 1.4539, forged body

www.gemu-group.com 33 / 34 GEMÜ 687

 Subject to alteration | 02.2024 | 88048765

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