GE VARIVENT S Series Operating Instruction page 44

Maintenance
Disassembling the Valve
Carry out the following steps:
1.
2.
3.
4.
5.
6.
7.
8.
9.
®
44
Warning!
Spring tension in the valve (spring-to-close action)
Danger of injury when detaching the clamp connections (43, 46) as the
released spring pretension will suddenly lift the actuator.
► Therefore, release the spring tension before detaching the clamp
connections by pressurizing the actuator with compressed air at max. 6 or 7
bar (depending on the type of positioner) or by mechanically adjusting the
control cone.
Notice
Sensitive valve parts
Damage to valve parts.
► Protect the valve parts against impact stress.
► Do not put the valve insert down on the valve disk
► Work carefully when disassembling the valve.
Remove the clamp connection (43.2).
Withdraw the valve from the housings (401.2) and (401.3).
! Do not set the valve insert down on the valve disk but lay the valve insert
down.
! Protect the valve parts against impact stress.
! The seat ring (33.1) is placed freely in the housing and can hit the valve
disk when the valve is moved.
Lower the valve disk.
®
Spring-closing valve: Vent the actuator.
®
Spring-opening valve: release the actuator pretension.
Unscrew the coupling clip (6).
Loosen the nut (76) and the adapter (10) and turn them downwards on the
valve disk (15).
Remove the clamp connection (46), take off the actuator (A) and the motor
stool (9).
Pull the valve disk (15) out of the housing (401.1).
! Protect the valve parts against impact stress.
Unscrew the nut (76) and adapter (10) from the valve disk (15).
®
Sealing ring (1), bearing (2), sealing disk (3), bearing disk (4), O-ring (5)
and valve disk (15) with V-ring (7) are accessible.
Remove the seat ring (33.1) from the housing (401.1).
Valve W has been disassembled.
430BAL011074EN_5
08.11.2021