Burkert Type 2731 - Manual (Page 22)

11.2 Maintenance work
11.2.1 actuator
The actuator of the diaphragm control valve is maintenance-free
provided it is used according to these operating instructions.
11.2.2 Wearing parts of the diaphragm
control valve
Parts which are subject to natural wear:
• Seals
• Diaphragm
→
If leaks occur, replace the particular wearing part with an appro-
priate spare part (see chapter “13 Replacement parts”).
A bulging PTFE diaphragm may reduce the flow.
The replacing of the wearing parts is described in chapter
“12 Repairs”.
11.2.3 inspection intervals
→
Check diaphragm for wear after maximum 10 5 switching cycles.
Muddy and abrasive media require correspondingly shorter
inspection intervals!
11.2.4 service life of the diaphragm
The service life of the diaphragm depends on the following factors:
• Diaphragm material
• Medium, Medium pressure, Medium temperature
• Actuator size
• Pilot pressure for CFB.
protecting the diaphragm
→
For CFB try and select the pilot pressure not higher than is
required to actuate the medium pressure.
11.2.5 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.
Follow instructions for use in the Ex area!
See chapter “3.1”
.
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Maintenance,cleaning
english
Type 2730 / 2731 DN 65-100