Burkert Type 2105 - Manual (Page 36)

36
Maintenance,cleaning
Warning!
for control function i – danger if pilot pressure fails!
For control function I control and resetting occur pneumatically. If
the pressure fails, no defined position is reached.
▶ To ensure a controlled restart, first pressurize the product with
pilot pressure, then switch on the medium.
10.2 maintenance work
10.2.1 actuator
The actuator of the diaphragm valve is maintenance-free provided it
is used according to these operating instructions.
10.2.2 Wearing parts of the diaphragm
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 entitled “13 Replacement parts”).
A bulging PTFE diaphragm may reduce the flow.
The replacing of the wearing parts is described in chapter
“11 Repairs”.
10.2.3 inspection intervals
→
Check diaphragm for wear after maximum 10 5 switching cycles.
Muddy and abrasive media require correspondingly shorter
inspection intervals!
10.2.4 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 and CFI.
english
Type 2103, 2104, 2105