Da-Mode / Double Acting; Commissioning; Pressure Testing - GF DIASTAR Six Manuel D'utilisation

Instruction Manual
6.4.3

DA-mode / Double acting

Abb. 19
 4/2-way or 5/2-way solenoid valves are used to control double acting actuators
(DA).
 They can be mounted either directly to the actuator via a Namur connector plate
or via valve clusters.
7

Commissioning

NOTICE
Higher control pressures or mechanical aids or cavitation
Damage to the diaphragm valve.
 Use mentioned control pressure to actuate the diaphragm valve.
 Use valve only at optimal control operation conditions.
 Check that all valves are in the required open or closed position.
 Fill the piping system and deaerate completely.
7.1

Pressure testing

 Make sure that the test pressure may not exceed the PN of the diaphragm valve.
Diaphragm valve pressure testing is subject to the same regulations as the
piping system.
 When pressure exeeds 10 bar the controll pressure must be throttled by exhaust
air (adjust actuating time to approx. 3 s)
 The valves and connections should be checked for a tight seal during the
pressure test.
52
Commissioning