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.
Carry out the following steps:
1.
Raise the valve disk (17).
®
Spring-closing valve: Vent the actuator.
®
Spring-opening valve: pressurize the actuator.
2.
Remove the clamp connection (43.3).
3.
Pull the valve out of the housing (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.
4.
Lower the valve disk (15).
®
Spring-closing valve: Vent the actuator.
®
Spring-opening valve: pressurize the actuator with compressed air (max. 8
bar).
5.
Unscrew the valve disk (17) with an open end spanner.
6.
Remove the seat ring (33.1) from the housing.
7.
Raise the valve disk (15).
®
Spring-closing valve: Vent the actuator.
®
Spring-opening valve: pressurize the actuator.
8.
Remove the clamp connection (43.1) between the motor stool (9) and the
housing (401.1).
9.
Spring-closing valve: Depressurize the actuator (A) and detach the air supply.
Maintenance
Disassembling the Valve
430BAL011074EN_5
46
08.11.2021
