Pneumatic Connections; Control Function; Connecting The Control Medium; Commissioning - Gemü R647 Betriebsanleitung

11 Pneumatic connections

11.1 Control function

The following control function is available:
Control function 5
closed by control pressure,
opened by operating pressure:
Valve resting position: Opened by operating pressure. Activa-
tion of the actuator (connector 4) closes the valve. When the
control pressure is removed, the applied operating pressure
opens the valve again.

11.2 Connecting the control medium

Only use control medium lines with parallel threads.
▶ If you use tapered screw threads, there is a risk of stress
cracking at the control medium connector.
1. Use suitable connectors.
2. Connect the control medium lines tension-free and
without any bends or knots.
Thread size of the control medium connector: G1/4
Control function
5 Closed by control pres-
sure, opened by operat-
ing pressure
(connector 4, see picture above)
www.gemu-group.com
Connector 4
Control function 5
CAUTION
Connection
4: Control medium (close)

12 Commissioning

Corrosive chemicals!
▶ Risk of caustic burns
●
●
Leakage!
▶ Emission of dangerous materials
●
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).
ð Harmful foreign matter has been removed.
ð The product is ready for use.
3. Commission the product.
4. Commissioning of actuators in accordance with the en-
closed instructions.

13 Operation

Operate the product according to the control function (see
also chapter "Pneumatic connections").
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WARNING
Wear appropriate protective gear.
Completely drain the plant.
CAUTION
Provide for precautionary measures
against exceeding the maximum per-
missible pressure that may be caused
by pressure surges (water hammer).
CAUTION
13 Operation
GEMÜ R647