Burkert Type 2012 - Manual (Page 20)

20
Maintenance,Cleaning
Type 2012
Release bore
Fig. 20: Release bore
9.2.1 cleaning
Commercially available cleaning agents can be used to clean the
outside.
note!
avoid causing damage with cleaning agents.
▶ Before cleaning, check that the cleaning agents are compatible
with the body materials and seals.
9.3 replacing the valve seat
remove the actuator from the valve body
→
Clamp the valve body in a holding device.
note!
damage to the seat seal or the seat contour!
▶ When removing the actuator, ensure that the valve is in open
position.
→
Control function A: pressurize the lower control air connection
with compressed air (6 bar): valve opens.
→
Using a suitable open-end wrench, place the wrench flat on the
tube.
→
Unscrew the actuator from the valve body.
replacing valve seat
→
Unscrew old valve seat using the installation tool and open-end
wrench.
→
Clean thread and sealing surface in the body using compressed air.
→
Select tool insert and screw into the installation tool.
Installation tool
Tool insert
(according to nominal
width of seat)
Valve seat
Fig. 21: Replacing the valve seat
english