GEM 532Z User manual

GEMÜ 532Z
Pneumatically operated globe valve with two-stage actuator
Operating instructions
EN
further information
webcode: GW-532Z

All rights including copyrights or industrial property rights are expressly reserved.
Keep the document for future reference.
© GEMÜ Gebr. Müller Apparatebau GmbH & Co. KG
23.11.2020
www.gemu-group.com2 / 28GEMÜ 532Z

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
3.3 Functional description ....................................... 6
3.4 Flow direction ..................................................... 6
4 GEMÜ CONEXO ......................................................... 6
5 Correct use ................................................................ 6
6 Order data ................................................................. 7
6.1 Order codes ........................................................ 7
6.2 Order example .................................................... 8
7 Technical data ........................................................... 9
7.1 Medium ............................................................... 9
7.2 Temperature ....................................................... 9
7.3 Pressure .............................................................. 9
7.4 Product compliance ........................................... 12
7.5 Mechanical data ................................................. 12
8 Dimensions ............................................................... 13
8.1 Actuator/Installation dimensions ..................... 13
8.2 Body dimensions ................................................ 14
9 Manufacturer's information ....................................... 17
9.1 Delivery ............................................................... 17
9.2 Packaging ........................................................... 17
9.3 Transport ............................................................ 17
9.4 Storage ............................................................... 17
10 Installation in piping .................................................. 17
10.1 Preparing for installation ................................... 17
10.2 Installation position ........................................... 18
10.3 Installation with butt weld spigots .................... 18
10.4 Installation with threaded sockets .................... 18
10.5 Installation with threaded spigots .................... 18
10.6 Installation with flanged connections ............... 18
11 Pneumatic connections ............................................. 19
11.1 Control function .................................................. 19
11.2 Connecting the control medium ........................ 19
12 Commissioning ......................................................... 20
13 Operation .................................................................. 20
13.1 Control function 1 ............................................... 20
14 Troubleshooting ........................................................ 21
15 Inspection and maintenance ...................................... 22
15.1 Spare parts ......................................................... 22
15.2 Removing the actuator ...................................... 22
15.3 Replacing the seals ............................................ 23
15.4 Mounting the actuator ....................................... 23
16 Removal from piping ................................................. 24
17 Disposal .................................................................... 24
18 Returns ..................................................................... 24
19 Declaration of Incorporation according to 2006/42/
EC (Machinery Directive) ........................................... 25
20 Declaration of conformity according to 2014/68/EU
(Pressure Equipment Directive) ................................. 26
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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.
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!
The actuator cover is under spring pressure!
Incorrect combination of actuator and valve
body!

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2 Safety information
The safety information in this document refers only to an in-
dividual 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
responsible for the production of the risk analysis and for
compliance with the resulting precautionary measures and
regional safety regulations.
The document contains fundamental safety information that
must be observed during commissioning, operation and
maintenance. 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 specifica-
tions.
13. Maintain the product correctly.
14. Do not carry out any maintenance work and repairs not
described in this document without consulting the manu-
facturer first.
In cases of uncertainty:
15. Consult the nearest GEMÜ sales office.
3 Product description
3.1 Construction
2
3
4
1
A
B
5
Ite
m
Name Materials
A Actuator -
B Valve body 1.4408 investment casting, EN-
GJS-400-18-LT (GGG 40.3)
1 Stroke limiter 1.4305
2 Lock nut 1.4305
3 Piston Aluminium
4 Spindle 1.4305
5 Seat seal PTFE
3.2 Description
The GEMÜ 532Z 2/2-way globe valve has a low maintenance
aluminium two-stage double piston actuator and is pneu-
matically operated. The valve spindle is sealed by a self-ad-
justing gland packing providing low maintenance and reliable
valve spindle sealing even after a long service life. A wiper
ring fitted in front of the gland packing protects the seal
against contamination and damage.
3 Product description

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4 GEMÜ CONEXO
3.3 Functional description
1
2
3
4
1
2
3
4
R
V
R
V
When control pressure (connection V) is applied, the lower
actuator piston strokes 100%. The stroke of the upper part of
the actuator (connection R), however, can be steplessly lim-
ited from 0% to 100% by means of the stroke limiter (item 1)
and secured by the lock nut (item 2).
When a stroke limiter is used, the piston (item 3) moves
against the stroke limiter (item 1) and flow restriction is pos-
sible (connection R).
If the lower part of the actuator (connection V) is under con-
trol pressure, the valve fully opens, pushing the spindle (item
4) upwards through the upper piston.
3.4 Flow direction
The flow direction is indicated by an arrow on the valve body.
2/2-way body
under the seat
4 GEMÜ CONEXO
In the corresponding design with CONEXO, this product has
an RFID transponder for electronic recognition. The position
of the RFID transponder can be seen below. The CONEXO pen
helps read out information stored in the RFID transponders.
The CONEXO app or CONEXO portal is required to view this
information.
Installing the RFID transponder
RFID transponder
5 Correct use
DANGER
Danger of explosion!
▶Risk of severe injury or death.
●Do not use the product in potentially
explosive zones.
●Only use the product in potentially ex-
plosive zones confirmed in the declar-
ation of conformity.
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.
1. Use the product in accordance with the technical data.
2. Note the supplement acc. to ATEX
3. Please note the flow direction on the valve body.

6 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
Globe valve, pneumatically operated,
aluminium piston actuator
532
2 DN Code
DN 15 15
DN 20 20
DN 25 25
DN 32 32
DN 40 40
DN 50 50
3 Body configuration Code
2/2-way body D
4 Connection type Code
Flange EN 1092, PN 16, form B,
face-to-face dimension FTF EN 558 series 1, ISO
5752, basic series 1
8
Flange EN 1092, PN 25, form B,
face-to-face dimension FTF EN 558 series 1, ISO
5752, basic series 1
10
Flange EN 1092, PN 40, form B,
face-to-face dimension FTF EN 558 series 1, ISO
5752, basic series 1
11
Flange ANSI Class 150 RF,
face-to-face dimension FTF EN 558 series 1, ISO
5752, basic series 1
39
Flange JIS 20K,
face-to-face dimension FTF EN 558 series 10,
ASME/ANSI B16.10 table 1, column 16,
DN 50 drilled to JIS 10K
48
5 Valve body material Code
1.4408, investment casting 37
EN-GJS-400-18-LT (GGG 40.3) 90
6 Seat seal Code
PTFE 5
PTFE, glass fibre reinforced 5G
1.4404 10
7 Control function Code
Normally Closed (NC) 1
8 Actuator version Code
Two-stage actuator, actuator size 1 1Z
Two-stage actuator, actuator size 2 2Z
9 Type of design Code
For higher operating temperatures 2023
Spindle seal FPM-PTFE,
actuator components suitable for high ambient
temperatures
2017
Spindle seal PTFE-PTFE 2013
without
10 Special version Code
Rigid plug fixing,
special version for oxygen,
maximum medium temperature: 60°C,
media-wetted seal materials and auxiliary materi-
als with BAM testing
B
Rigid plug fixing C
without
11 CONEXO Code
without
Integrated RFID chip for electronic identification
and traceability
C
6 Order data
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Order example
Order option Code Description
1 Type 532 Globe valve, pneumatically operated,
aluminium piston actuator
2 DN 25 DN 25
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
5 Valve body material 90 EN-GJS-400-18-LT (GGG 40.3)
6 Seat seal 5 PTFE
7 Control function 1 Normally Closed (NC)
8 Actuator version 1Z Two-stage actuator, actuator size 1
9 Type of design without
10 Special version without
11 CONEXO without
6 Order data
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7 Technical data
7.1 Medium
Working medium: Corrosive, inert, gaseous and liquid media which have no negative impact on the physical and
chemical properties of the body and seal material.
Control medium: Inert gases
Max. permissible viscos-
ity:
600 mm²/s (cSt)
Other versions for lower/higher temperatures and higher viscosities on request.
7.2 Temperature
Media temperature: Standard: -10 to 180 °C
Special version: -10* to 210 °C
only with ordering option Seat seal code 5G or 10 and
Design 2023
Control medium temper-
ature:
max. 60 °C
Ambient temperature: Standard: 0 to 60 °C
Special version: 0 to 130 °C
only with ordering option Type of design 2017
Storage temperature: 0 to 40 °C
7.3 Pressure
Operating pressure: DN Actuator version 1Z Actuator version 2Z
piston ø 70 mm piston ø 120 mm
15 25.0 -
20 20.0 25.0
25 10.0 25.0
32 7.0 16.0
40 4.5 15.0
50 - 10.0
Pressures in bar
Pressure rating: PN 16
PN 25
PN 40
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7 Technical data

Pressure/temperature
correlation: Connection
types
Code 1)
Materials
Code 2)
Max. allowable operating pressures in bar at temperature in °C
RT 100 150 200 250 300
8 37 16.0 16.0 14.5 13.4 12.7 11.8
10 25.0 25.0 22.7 21.0 19.8 18.5
11 40.0 40.0 36.3 33.7 31.8 29.7
39 19.0 16.0 14.8 13.6 12.0 10.2
8 90 16.0 16.0 15.5 14.7 13.9 11.2
39 17.2 16.0 14.8 13.9 12.1 10.2
All pressures are gauge pressures.
The valves may be used to -10 °C
RT = room temperature
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
Code 10: Flange EN 1092, PN 25, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic
series 1
Code 11: Flange EN 1092, PN 40, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic
series 1
Code 39: Flange ANSI Class 150 RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1
2) Valve body material
Code 37: 1.4408, investment casting
Code 90: EN-GJS-400-18-LT (GGG 40.3)
Control pressure: DN Actuator version 1Z Actuator version 2Z
piston ø 70 mm pistonø 120 mm
15 5.5 - 10.0 -
20 5.5 - 10.0 4.5 - 8.0
25 5.5 - 10.0 4.5 - 8.0
32 5.5 - 10.0 4.5 - 8.0
40 5.5 - 10.0 4.5 - 8.0
50 - 5.5 - 8.0
Pressures in bar
Kv values: DN Kv values
15 4.6
20 8.0
25 13.0
32 22.0
40 35.0
50 50.0
Kv values in m³/h
Filling volume: Actuator version Piston Filling volume
1Z Top 0.07 dm³
Bottom 0.10 dm³
2Z Top 0.51 dm³
Bottom 0.60 dm³
Leakage rate: Seat seal Standard Test procedure Leakage rate Test medium
Metal DIN EN 12266-1 P12 F Air
PTFE DIN EN 12266-1 P12 A Air
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7 Technical data

Piston diameter: Actuator version Piston diameter
1Z 70 mm
2Z 120 mm
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7 Technical data

7.4 Product compliance
Pressure Equipment Dir-
ective:
2014/68/EU
Machinery Directive: 2006/42/EU
Food: FDA*
1935*
* For contact with food, the following ordering options must be selected:
- Valve body material code 37
- Design code 2013
Environment: RoHS
7.5 Mechanical data
Weight: Actuator
DN Actuator version 1Z Actuator version 2Z
15 2.4 -
20 2.6 4.7
25 2.8 5.0
32 3.4 5.6
40 3.7 6.5
50 4.4 7.4
Weights in kg
Valve body
DN Weight
15 2.2
20 3.0
25 3.7
32 5.3
40 6.3
50 8.4
Weights in kg
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7 Technical data

8 Dimensions
8.1 Actuator/Installation dimensions
G 1/4 G 1/4
F
H
ØB
e
8.1.1 Actuator version 1Z
DN SW 1 H ø B e F
15 36 294 100 M 16 x 1 58
20 41 301
25 46 312
32 55 317
40 40 328
50 75 336
Dimensions in mm
8.1.2 Actuator version 2Z
DN SW 1 H ø B e F
20 41 434 168 M 22 x 1.5 121
25 46 445
32 55 450
40 60 461
50 75 469
Dimensions in mm
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8 Dimensions

8.2 Body dimensions
8.2.1 Flange connection code 8
ØK
ØL
ØD
FTF
DN Connection type code 8 1)
Material code 2)
37 90
FTF ø D ø L ø K n FTF ø D ø L ø K n
15 - - - - - 130.0 95.0 14.0 65.0 4
20 - - - - - 150.0 105.0 14.0 75.0 4
25 - - - - - 160.0 115.0 14.0 85.0 4
32 - - - - - 180.0 140.0 18.0 100.0 4
40 - - - - - 200.0 150.0 18.0 110.0 4
50 230.0 165.0 18.0 125.0 4 230.0 165.0 18.0 125.0 4
Dimensions in mm
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
2) Valve body material
Code 37: 1.4408, investment casting
Code 90: EN-GJS-400-18-LT (GGG 40.3)
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8 Dimensions

8.2.2 Flange connection code 10, 11, 48
ØK
ØL
ØD
FTF
DN Connection types code 1)
10 11 48
Material code 37 2)
FTF ø D ø L ø k n FTF ø D ø L ø K n FTF ø D ø L ø K n
15 130.0 95.0 14.0 65.0 4 130.0 95.0 14.0 65.0 4 108.0 95.0 15.0 70.0 4
20 150.0 105.0 14.0 75.0 4 150.0 105.0 14.0 75.0 4 117.0 100.0 15.0 75.0 4
25 160.0 115.0 14.0 85.0 4 160.0 115.0 14.0 85.0 4 127.0 125.0 19.0 90.0 4
32 180.0 140.0 18.0 100.0 4 180.0 140.0 18.0 100.0 4 - - - - -
40 200.0 150.0 18.0 110.0 4 200.0 150.0 18.0 110.0 4 16..0 140.0 19.0 105.0 4
50 230.0 165.0 18.0 125.0 4 - - - - - 203.0 155.0 19.0 120.0 4
Dimensions in mm
n = number of bolts
1) Connection type
Code 10: Flange EN 1092, PN 25, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1
Code 11: Flange EN 1092, PN 40, form B, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1
Code 48: Flange JIS 20K, face-to-face dimension FTF EN 558 series 10, ASME/ANSI B16.10 table 1, column 16, DN 50 drilled to JIS 10K
2) Valve body material
Code 37: 1.4408, investment casting
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8 Dimensions

8.2.3 Flange connection code 39
ØK
ØL
ØD
FTF
DN Connection types code 39 1)
Material code 3790 2)
FTF ø D ø L ø K n
15 130.0 90.0 15.9 60.3 4
20 150.0 100.0 15.9 69.9 4
25 160.0 110.0 15.9 79.4 4
32 180.0 115.0 15.9 88.9 4
40 200.0 125.0 15.9 98.4 4
50 230.0 150.0 19.0 120.7 4
Dimensions in mm
n = number of bolts
1) Connection type
Code 39: Flange ANSI Class 150 RF, face-to-face dimension FTF EN 558 series 1, ISO 5752, basic series 1
2) Valve body material
Code 37: 1.4408, investment casting
Code 90: EN-GJS-400-18-LT (GGG 40.3)
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8 Dimensions

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9 Manufacturer's information
9.1 Delivery
●Check that all parts are present and check for any dam-
age 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.
Control
function
Function Condition as supplied
to customer
1 Normally closed (NC) closed
9.2 Packaging
The product is packaged in a cardboard box which can be re-
cycled as paper.
9.3 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 reg-
ulations / environmental protection laws.
9.4 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.
10 Installation in piping
10.1 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.
10 Installation in piping

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10 Installation in piping
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 va-
porization 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).
14. Please note the flow direction (see chapter "Flow direc-
tion").
15. Please note the installation position (see chapter "Install-
ation position").
10.2 Installation position
The installation position of the product is optional.
10.3 Installation with butt weld spigots
Fig.1: Butt weld spigots
1. Carry out preparations for installation (see chapter "Pre-
paring for installation").
2. Adhere to good welding practices!
3. Remove actuator A (see chapter "Removing the actu-
ator").
4. Weld the body of the product in the piping.
5. Allow butt weld spigots to cool down.
6. Mount actuator A (see chapter "Mounting the actuator").
7. Re-attach or reactivate all safety and protective devices.
8. Flush the system.
10.4 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.
10.5 Installation with threaded spigots
Fig.3: Threaded spigots
NOTICE
Thread sealant
▶The thread sealant is not included in the scope of deliv-
ery.
●Only use appropriate thread sealant.
1. Keep thread sealant ready.
2. Carry out preparations for installation (see chapter "Pre-
paring for installation").
3. Screw the pipe into the threaded connection of the valve
body in accordance with valid standards.
ðUse appropriate thread sealant.
4. Re-attach or reactivate all safety and protective devices.
10.6 Installation with flanged connections
Fig.4: Flanged connection

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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 con-
nection 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.
11 Pneumatic connections
The product has 2 control medium connectors.
11.1 Control function
The following control function is available:
Control function 1 normally closed (NC)
Valve resting position: closed by spring force. For activation
of the valve see chapter "Functional description".
Control medium
connector R
Control medium
connector V
Control function Connectors
V R
1 (NC) Full stroke Reduced stroke
11.2 Connecting the control medium
1. Connect the control medium lines tension-free and
without any bends or knots.
NOTICE
▶The control medium connectors can be rotated through
360°. The position of the control medium connectors is
optional.
2. Use appropriate connectors according to the application.
Thread size of the control medium connectors: G1/4
Control function Connectors
1 Normally closed (NC) V and R
For connectors V / R see chapter "Control function"
11 Pneumatic connections

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12 Commissioning
12 Commissioning
WARNING
Corrosive chemicals!
▶Risk of caustic burns.
●Wear suitable protective gear.
●Completely drain the plant.
CAUTION
Leakage
▶Emission of dangerous materials.
●Provide precautionary measures against exceeding the
maximum permitted pressures caused by pressure
surges (water hammer).
CAUTION
Cleaning agent
▶Damage to the GEMÜ product.
●The plant operator is responsible for selecting the clean-
ing material and performing the procedure.
1. Check the tightness and the function of the product
(close and reopen the product).
2. Flush the piping system of new plant and following repair
work (the product must be fully open).
ðHarmful foreign matter has been removed.
ðThe product is ready for use.
3. Commission the product.
4. Commissioning of operators in accordance with the en-
closed instructions.
13 Operation
Operate the product according to the control function (see
also chapter "Pneumatic connections").
13.1 Control function 1
In its resting position the product is closed by spring force. 2
control medium connectors (V and R) are available.
●Activate the actuator via V and R.
ðThe product opens.