GEM 675 User manual

GEMÜ 675
Manually operated diaphragm valve
Operating instructions
EN
further information
webcode: GW-675

All rights including copyrights or industrial property rights are expressly reserved.
Keep the document for future reference.
© GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
17.11.2020
www.gemu-group.com2 / 27GEMÜ 675

Contents
1 General information .................................................. 4
1.1 Information .......................................................... 4
1.2 Symbols used ...................................................... 4
1.3 Definition of terms .............................................. 4
1.4 Warning notes ..................................................... 4
2 Safety information .................................................... 5
3 Product description ................................................... 5
3.1 Construction ........................................................ 5
3.3 Function ............................................................... 5
4 Correct use ............................................................... 6
5 Order data ................................................................. 7
5.1 Order codes ......................................................... 7
5.2 Order example ..................................................... 8
6 Technical data .......................................................... 9
6.1 Medium ................................................................ 9
6.2 Temperature ........................................................ 9
6.3 Pressure ............................................................... 9
6.4 Product compliance ............................................ 10
6.5 Mechanical data .................................................. 10
7 Dimensions ............................................................... 12
7.1 Actuator dimensions ........................................... 12
7.2 Body dimensions ................................................. 13
7.2.1 Flange EN (code 8) ................................. 13
7.2.2 Flange EN (code 53) .............................. 14
7.2.3 Flange ANSI Class (code 38, 39) ........... 15
7.2.4 Flange ANSI Class (code 56) ................. 16
7.2.5 Flange BS (code 51) ............................... 17
7.2.6 Threaded socket DIN (code 1) .............. 18
8 Manufacturer's information ....................................... 19
8.1 Delivery ................................................................ 19
8.2 Packaging ............................................................ 19
8.3 Transport ............................................................. 19
8.4 Storage ................................................................. 19
9 Installation in piping .................................................. 19
9.1 Preparing for installation .................................... 19
9.2 Installation with flanged connections ................ 20
9.3 Installation with threaded sockets ..................... 20
10 Operation .................................................................. 20
10.1 Optical position indicator .................................... 20
10.2 Lockable handwheel ........................................... 20
11 Commissioning ......................................................... 21
12 Inspection and maintenance ...................................... 21
12.1 Spare parts .......................................................... 21
12.4 Mounting the diaphragm .................................... 22
12.4.1 Mounting the convex diaphragm .......... 22
12.4.2 Mounting the concave diaphragm ........ 23
12.5 Mounting the actuator ........................................ 23
13 Troubleshooting ........................................................ 24
14 Removal from piping ................................................. 25
15 Disposal .................................................................... 25
16 Returns ..................................................................... 25
17 Declaration of conformity according to 2014/68/EU
(Pressure Equipment Directive) ................................. 26
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www.gemu-group.com4 / 27GEMÜ 675
1 General information
1 General information
1.1 Information
– The descriptions and instructions apply to the stand-
ard versions. For special versions not described in this
document the basic information contained herein ap-
plies in combination with any additional special docu-
mentation.
– Correct installation, operation, maintenance and repair
work ensure faultless operation of the product.
– Should there be any doubts or misunderstandings, the
German version is the authoritative document.
– Contact us at the address on the last page for staff
training information.
1.2 Symbols used
The following symbols are used in this document:
Symbol Meaning
Tasks to be performed
Response(s) to tasks
– Lists
1.3 Definition of terms
Working medium
The medium that flows through the GEMÜ product.
Diaphragm size
Uniform seat size of GEMÜ diaphragm valves for different
nominal sizes.
1.4 Warning notes
Wherever possible, warning notes are organised according to
the following scheme:
SIGNAL WORD
Type and source of the danger
Possible
symbol for the
specific
danger
Possible consequences of non-observance.
Measures for avoiding danger.
Warning notes are always marked with a signal word and
sometimes also with a symbol for the specific danger.
The following signal words and danger levels are used:
DANGER
Imminent danger!
▶Non-observance can cause death or
severe injury.
WARNING
Potentially dangerous situation!
▶Non-observance can cause death or
severe injury.
CAUTION
Potentially dangerous situation!
▶Non-observance can cause moderate
to light injury.
NOTICE
Potentially dangerous situation!
▶Non-observance can cause damage to
property.
The following symbols for the specific dangers can be used
within a warning note:
Symbol Meaning
Danger of explosion
Corrosive chemicals!
Hot plant components!
Handwheel can become hot during operation!

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2 Safety information
The safety information in this document refers only to an indi-
vidual product. Potentially dangerous conditions can arise in
combination with other plant components, which need to be
considered on the basis of a risk analysis. The operator is re-
sponsible for the production of the risk analysis and for com-
pliance with the resulting precautionary measures and re-
gional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and main-
tenance. Non-compliance with these instructions may cause:
– Personal hazard due to electrical, mechanical and
chemical effects.
– Hazard to nearby equipment.
– Failure of important functions.
– Hazard to the environment due to the leakage of dan-
gerous materials.
The safety information does not take into account:
– Unexpected incidents and events, which may occur
during installation, operation and maintenance.
– Local safety regulations which must be adhered to by
the operator and by any additional installation person-
nel.
Prior to commissioning:
1. Transport and store the product correctly.
2. Do not paint the bolts and plastic parts of the product.
3. Carry out installation and commissioning using trained
personnel.
4. Provide adequate training for installation and operating
personnel.
5. Ensure that the contents of the document have been fully
understood by the responsible personnel.
6. Define the areas of responsibility.
7. Observe the safety data sheets.
8. Observe the safety regulations for the media used.
During operation:
9. Keep this document available at the place of use.
10. Observe the safety information.
11. Operate the product in accordance with this document.
12. Operate the product in accordance with the specifications.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not de-
scribed in this document without consulting the manufac-
turer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
1
2
3
4
Item Name Materials
1 Optical position in-
dicator
PP red
2 Actuator Cast iron
3 Diaphragm CR
EPDM
FKM
NBR
PTFE / EPDM (one-piece)
PTFE / EPDM (two-piece)
4 Valve body EN-GJL-250 (GG 25)
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-500-7 (GGG 50), PFA
lined
EN-GJS-500-7 (GGG 50), PP lined
3.2 Description
The GEMÜ 675 2/2-way diaphragm valve has a metal hand-
wheel and is manually operated. An integral optical position
indicator is standard.
3.3 Function
The product controls a flowing medium by manual operation.
The product has an optical position indicator as standard. The
optical position indicator indicates the OPEN and CLOSED po-
sitions.
3 Product description

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4 Correct use
4 Correct use
DANGER
Danger of explosion
▶Risk of death or severe injury.
●Do not use the product in potentially
explosive zones.
WARNING
Improper use of the product
▶Risk of severe injury or death.
▶Manufacturer liability and guarantee will be void.
●Only use the product in accordance with the operating
conditions specified in the contract documentation and in
this document.
The product is designed for installation in piping systems and
for controlling a working medium.
The product is not intended for use in potentially explosive
areas.
●Use the product in accordance with the technical data.

5 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
Diaphragm valve, manually operated,
metal handwheel, metal distance piece,
optical position indicator
675
2 DN Code
DN 15 15
DN 20 20
DN 25 25
DN 32 32
DN 40 40
DN 50 50
DN 65 65
DN 80 80
DN 100 100
DN 125 125
DN 150 150
3 Body configuration Code
2/2-way body D
4 Connection type Code
Threaded connection
Threaded socket DIN ISO 228 1
Flange
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
8
Flange ANSI Class 150 RF,
face-to-face dimension FTF MSS SP-88,
length only for body configuration D
38
Flange ANSI Class 125/150 RF,
face-to-face dimension FTF EN 558 series 1, ISO
5752, basic series 1,
length only for body configuration D
39
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
51
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 configuration D
53
Flange ANSI Class 125/150 RF,
face-to-face dimension FTF EN 558 series 7, ISO
5752, basic series 7,
length only for body configuration D
56
5 Valve body material Code
EN-GJL-250 (GG 25) 8
EN-GJS-400-18-LT (GGG 40.3),
PFA lined
17
EN-GJS-400-18-LT (GGG 40.3),
PP lined
18
EN-GJS-500-7 (GGG 50),
PFA lined
81
EN-GJS-400-18-LT (GGG 40.3),
hard rubber lined
83
EN-GJS-500-7 (GGG 50),
PP lined
91
6 Diaphragm material Code
NBR 2
FKM 4
CR 8
EPDM 29
PTFE/EPDM one-piece 54
PTFE/EPDM two-piece 5M
7 Control function Code
Manually operated (MO) 0
Manually operated,
with lockable handwheel
L
Manually operated with lockable handwheel,
(without proprietary padlock)
B
8 Actuator version Code
DN 15 - 25, diaphragm size 25
Actuator size 0 0
DN 32 - 40, diaphragm size 40
Actuator size 1 1
DN 50, diaphragm size 50
Actuator size 2 2
DN 65, diaphragm size 65
Actuator size 3 3
DN 80, diaphragm size 80
Actuator size 4 4
DN 100, diaphragm size 100
Actuator size 5 5
DN 125, diaphragm size 125
Actuator size 6 6
DN 150, diaphragm size 150
Actuator size 7 7
5 Order data
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Order example
Order option Code Description
1 Type 675 Diaphragm valve, manually operated,
metal handwheel, metal distance piece,
optical position indicator
2 DN 50 DN 50
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 8 EN-GJL-250 (GG 25)
6 Diaphragm material 29 EPDM
7 Control function 0 Manually operated (MO)
8 Actuator version 2 Actuator size 2
5 Order data
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6 Technical data
6.1 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.
6.2 Temperature
Media temperature: NBR (Code 2) -10 to 100 °C
FKM (Code 4) -10 to 90 °C
CR (Code 8) -10 to 100 °C
EPDM (Code 29) -10 to 100 °C
PTFE / EPDM (Code 54) -10 to 100 °C
PTFE / EPDM (Code 5M) -10 to 100 °C
Ambient temperature: META-Daten fehlen °F to META-Daten fehlen °F
Storage temperature: META-Daten fehlen — META-Daten fehlen °F
6.3 Pressure
Operating pressure: MG DN EPDM PTFE
25 15 - 25 0 - 10 0 - 6
40 32, 40 0 - 10 0 - 6
50 50 0 - 10 0 - 6
65 65 0 - 10 0 - 6
80 80 0 - 10 0 - 6
100 100 0 - 10 0 - 6
125 125 0 - 10 0 - 6
150 150 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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6 Technical data

Kv values: MG DN GG 25 PFA / PP Hard rubber
25 15 756
20 14 9 11
25 20 13 15
40 32 36 23 29
40 40 26 32
50 50 80 47 64
65 65 100 72 80
80 80 160 110 128
100 100 238 177 190
125 125 270 214 230
150 150 480 365 397
MG = diaphragm size, Kv values in m³/h
Kv values determined in accordance with EN 60534, inlet pressure 5 bar, Δp 1 bar, with connection flange EN
1092 length EN 558 series 1 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 pres-
sure, temperature, the process and their tightening 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.
6.4 Product compliance
Pressure Equipment Dir-
ective:
2014/68/EU
Food: FDA*
Regulation (EC) No. 1935/2004*
Regulation (EC) No. 10/2011*
EAC: TR CU 010/2011
TA Luft (German Clean
Air Act):
The product complies with the equivalence requirements of section 5.2.6.4 of the German Clean Air
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
6.5 Mechanical data
Weight: Actuator
Actuator version Weight
0 1.1
1 2.1
2 2.7
3 5.9
4 9.5
5 12.0
6 15.0
7 25.0
Weights in kg
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6 Technical data

Weight: Body
MG DN Threaded socket Flange
Connection types code
1 8, 38, 39, 51, 53, 56
25 15 0.5 1.9
20 0.6 2.4
25 0.9 2.9
40 32 1.2 4.9
40 1.8 5.7
50 50 2.6 7.5
65 65 - 10.2
80 80 - 14.2
100 100 - 21.0
125 125 - 30.0
150 150 - 35.0
MG = diaphragm size, weight in kg
Installation position: Optional
Flow direction: Optional
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6 Technical data

7 Dimensions
7.1 Actuator dimensions
ø B
A
CT*
MG DN Actuator version ø B A
25 15 - 25 0 96 89
40 32 - 40 1 131 112
50 50 2 131 126
65 65 3 188 171
80 80 4 231 202
100 100 5 231 221
125 125 6 316 300
150 150 7 316 325
Dimensions in mm, MG = diaphragm size
* CT = A + H1 (see body dimensions)
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7 Dimensions

7.2 Body dimensions
7.2.1 Flange EN (code 8)
ØL
ØD
øk
H1
FTF
MG DN Connection type code 8 1)
Material code 2)
8 17, 18, 83
øD øk øL n H1 H1 FTF
25 15 95.0 65.0 14.0 4 19.0 18.0 130.0
20 105.0 75.0 14.0 4 19.0 20.5 150.0
25 115.0 85.0 14.0 4 19.0 23.0 160.0
40 32 140.0 100.0 19.0 4 28.0 28.7 180.0
40 150.0 110.0 19.0 4 28.0 33.0 200.0
50 50 165.0 125.0 19.0 4 35.0 39.0 230.0
65 65 185.0 145.0 19.0 4 27.5 51.0 290.0
80 80 200.0 160.0 19.0 8 33.0 59.5 310.0
100 100 220.0 180.0 19.0 8 43.0 73.0 350.0
125 125 250.0 210.0 19.0 8 65.0 87.0 400.0
150 150 285.0 240.0 23.0 8 58.0 109.0 480.0
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 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 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
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7 Dimensions

7.2.2 Flange EN (code 53)
ØL
ØD
øk
H1
FTF
MG DN Connection type code 53 1)
Material code 2)
8 17 8 17 8 17
øD øD øk øL n H1 H1 FTF FTF
25 15 95.0 - 65.0 14.0 4 19.0 - 117.0 -
20 105.0 - 75.0 14.0 4 19.0 - 117.0 -
25 115.0 - 85.0 14.0 4 19.0 - 127.0 -
40 32 140.0 - 100.0 19.0 4 28.0 - - -
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 -
100 100 220.0 - 180.0 19.0 8 43.0 - 305.0 -
125 125 250.0 - 210.0 19.0 8 65.0 - 356.0 -
150 150 285.0 280.0 3) 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
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7 Dimensions

7.2.3 Flange ANSI Class (code 38, 39)
ØL
ØD
øk
H1
FTF
MG DN Connection types code 1)
38 38 39
Material code 2)
8 17, 18, 83 17, 18 83 8, 17, 18,
83
øD øk øL n H1 H1 FTF FTF FTF
25 15 90.0 60.3 15.9 4 19.0 18.0 - - 130.0
20 100.0 69.9 15.9 4 19.0 20.5 146.0 146.4 150.0
25 110.0 79.4 15.9 4 19.0 23.0 146.0 146.4 160.0
40 32 115.0 88.9 15.9 4 28.0 28.7 - - 180.0
40 125.0 98.4 15.9 4 28.0 33.0 175.0 171.4 200.0
50 50 150.0 120.7 19.0 4 35.0 39.0 200.0 197.4 230.0
65 65 180.0 139.7 19.0 4 27.5 51.0 226.0 222.4 290.0
80 80 190.0 152.4 19.0 4 33.0 59.5 260.0 260.4 310.0
100 100 230,0 3) 190.5 19.0 8 43.0 73.0 327.0 324.4 350.0
125 125 255.0 215.9 22.2 8 65.0 87.0 - - 400.0
150 150 280.0 241.3 22.2 8 58.0 109.0 416.0 416.0 480.0
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
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 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 83: EN-GJS-400-18-LT (GGG 40.3), hard rubber lined
3) Connection code 39 / material code 8 ØD = 220
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7 Dimensions

7.2.4 Flange ANSI Class (code 56)
ØL
ØD
øk
H1
FTF
MG DN Connection type code 56 1)
Material code 2)
17 81, 91 17 81, 91
øD øk øL n H1 H1 FTF FTF
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
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
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7 Dimensions

7.2.5 Flange BS (code 51)
ØL
ØD
øk
H1
FTF
MG DN Connection type code 51 1)
Material code 2)
17 81, 91 17 81, 91
øD øk øL n H1 H1 FTF FTF
25 25 114.0 83.0 14.0 4 - 23.0 - 127.0
40 40 125.0 98.0 14.0 4 - 32.0 - 165.0
50 50 152.0 114.0 17.0 4 - 40.0 - 191.0
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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7 Dimensions

7.2.6 Threaded socket DIN (code 1)
R
L
t
SW2
H
H1
MG DN Connection type code 1 1)
Material code 8 2)
R H H1 t L SW 2 n
25 15 G 1/2 35.0 19.0 12.0 85.0 32 6
20 G 3/4 40.0 19.0 13.0 85.0 41 6
25 G 1 42.0 19.0 16.0 110.0 46 6
40 32 G 1¼ 56.0 28.0 16.0 120.0 55 6
40 G 1½ 61.0 28.0 18.0 140.0 65 6
50 50 G 2 73.0 35.0 18.0 165.0 75 6
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 8: EN-GJL-250 (GG 25)
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7 Dimensions

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8 Manufacturer's information
8.1 Delivery
●Check that all parts are present and check for any damage
immediately upon receipt.
The product's performance is tested at the factory. The scope
of delivery is apparent from the dispatch documents and the
design from the order number.
8.2 Packaging
The product is packaged in a cardboard box which can be re-
cycled as paper.
8.3 Transport
1. Only transport the product by suitable means. Do not drop.
Handle carefully.
2. After the installation dispose of transport packaging ma-
terial according to relevant local or national disposal regu-
lations / environmental protection laws.
8.4 Storage
1. Store the product free from dust and moisture in its ori-
ginal packaging.
2. Avoid UV rays and direct sunlight.
3. Do not exceed the maximum storage temperature (see
chapter "Technical data").
4. Do not store solvents, chemicals, acids, fuels or similar
fluids in the same room as GEMÜ products and their spare
parts.
5. Store the product in the "open" position.
9 Installation in piping
9.1 Preparing for installation
WARNING
The equipment is subject to pressure!
▶Risk of severe injury or death.
●Depressurize the plant.
●Completely drain the plant.
WARNING
Corrosive chemicals!
▶Risk of caustic burns.
●Wear suitable protective gear.
●Completely drain the plant.
CAUTION
Hot plant components!
▶Risk of burns.
●Only work on plant that has cooled
down.
CAUTION
Exceeding the maximum permissible pressure.
▶Damage to the product.
●Provide precautionary measures against exceeding the
maximum permitted pressures caused by pressure
surges (water hammer).
CAUTION
Use as step.
▶Damage to the product.
▶Risk of slipping-off.
●Choose the installation location so that the product can-
not be used as a foothold.
●Do not use the product as a step or a foothold.
NOTICE
Suitability of the product!
▶The product must be appropriate for the piping system
operating conditions (medium, medium concentration,
temperature and pressure) and the prevailing ambient
conditions.
NOTICE
Tools
▶The tools required for installation and assembly are not
included in the scope of delivery.
●Use appropriate, functional and safe tools.
1. Ensure the product is suitable for the relevant application.
2. Check the technical data of the product and the materials.
3. Keep appropriate tools ready.
4. Wear appropriate protective gear, as specified in the plant
operator's guidelines.
5. Observe appropriate regulations for connections.
6. Have installation work carried out by trained personnel.
7. Shut off plant or plant component.
8. Secure plant or plant component against recommission-
ing.
9. Depressurize the plant or plant component.
10. Completely drain the plant (or plant component) and let it
cool down until the temperature is below the media vapor-
ization temperature and cannot cause scalding.
11. Correctly decontaminate, rinse and ventilate the plant or
plant component.
12. Lay piping so that the product is protected against trans-
verse and bending forces, and also from vibrations and
tension.
13. Only install the product between matching aligned pipes
(see chapters below).
9 Installation in piping

www.gemu-group.com20 / 27GEMÜ 675
10 Operation
9.2 Installation with flanged connections
Fig.1: Flanged connection
NOTICE
Sealing material
▶The sealing material is not included in the scope of deliv-
ery.
●Only use appropriate sealing material.
NOTICE
Connector elements
▶The connector elements are not included in the scope of
delivery.
●Only use connector elements made of approved materi-
als.
●Observe permissible tightening torque of the bolts.
1. Keep sealing material ready.
2. Carry out preparations for installation (see chapter "Pre-
paring for installation").
3. Ensure clean, undamaged sealing surfaces on the connec-
tion flanges.
4. Align flanges carefully before installing them.
5. Clamp the product centrally between the piping with
flanges.
6. Centre the gaskets.
7. Connect the valve flange and the piping flange using ap-
propriate sealing materials and matching bolting.
8. Use all flange holes.
9. Tighten the bolts diagonally.
10. Re-attach or reactivate all safety and protective devices.
9.3 Installation with threaded sockets
Fig.2: Threaded socket
NOTICE
Sealing material
▶The sealing material is not included in the scope of deliv-
ery.
●Only use appropriate sealing material.
1. Keep thread sealant ready.
2. Carry out preparations for installation (see chapter "Pre-
paring for installation").
3. Screw the threaded connections into the pipe in accord-
ance with valid standards.
4. Screw the body of the product onto the piping using ap-
propriate thread sealant.
5. Re-attach or reactivate all safety and protective devices.
10 Operation
10.1 Optical position indicator
Valve open Valve closed
CAUTION
Handwheel can become hot during opera-
tion!
▶Risk of burns!
●Ensure protective gloves are worn
when operating handwheel.
10.2 Lockable handwheel
NOTICE
Lockable handwheel
▶A lockable handwheel is optionally available. It can be se-
cured with a padlock.