Installation With Threaded Spigots; Installation With Butt Weld Spigots; After The Installation; Pneumatic Connections - GEM 695 Operating Instructions Manual

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.

10.6 Installation with threaded spigots

Fig. 4: Threaded spigots
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.
ð Use appropriate thread sealant.
4. Re-attach or reactivate all safety and protective devices.
www.gemu-group.com
NOTICE
NOTICE

10.7 Installation with butt weld spigots

Fig. 5: Butt weld spigots
1. Carry out preparations for installation (see chapter "Pre-
paring for installation").
2. Adhere to good welding practices!
3. Disassemble the actuator with the diaphragm before weld-
ing in the valve body (see "Removing the actuator"
chapter).
4. Weld the body of the product in the piping.
5. Allow butt weld spigots to cool down.
6. Reassemble the valve body and the actuator with dia-
phragm (see "Mounting the actuator" chapter).
7. Re-attach or reactivate all safety and protective devices.
8. Flush the system.

10.8 After the installation

Diaphragms set in the course of time.
▶ Leakage
After disassembly/assembly of the product, check that
●
the bolts and nuts on the body are tight and retighten if
required.
● Re-attach or reactivate all safety and protective devices.

11 Pneumatic connections

11.1 Control function
The following control functions are available:

Control function 1

Normally closed (NC):
Valve resting position: closed by spring force. Activation of
the actuator (connector 2) opens the valve. When the actuator
is vented, the valve is closed by spring force.
Control function 2
Normally open (NO):
Valve resting position: opened by spring force. Activation of
the actuator (connector 4) closes the valve. When the actu-
ator is vented, the valve is opened by spring force.
Control function 3
Double acting (DA):
Valve resting position: no defined normal position. The valve
is opened and closed by activating the respective control me-
dium connectors (connector 2: open/connector 4: close).
29 / 40
11 Pneumatic connections
NOTICE
GEMÜ 695