Bürkert 2012, Руководство по обслуживанию

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10
Replacing the seal set
Type 2000, 2002, 2012
5 replacinG The Seal SeT
concerns valves without identification “R” in the actuator sizes: C (40 mm),
D (50 mm),
E (63 mm),
F (80 mm),
G (100 mm),
h (125 mm)
Valves with identification “R” see chapter “6”, page 15.
Danger!
danger – high pressure!
▶
Turn off the pressure and vent the lines before loosening lines or valves.
risk of injury from improper maintenance!
▶
Maintenance may be performed by authorized technicians only!
▶
To screw on or unscrew valve body or actuator, use an open-end wrench, never a pipe wrench.
▶
Observe tightening torques.
Required parts:
item description item description
5 Graphite seal (packed) 30 O-ring
7 Wiper 32 O-ring (lip seal actuator size C
without transparent cap)
11 O-ring 36 O-ring (actuator size C)
13 Chevron seal 37 Lip seal (actuator size C)
21 O-ring 53 Self-locking ring (actuator size C,
without transparent cap)
23 Piston seal
note!
the actuator must be completely removed to replace all the seals. a special Bürkert assembly sleeve
is required to mount the packing gland.
do not use any pointed or sharp instruments!
5.5.1 disassembly
→
Mount valve
1
on the body.
→
Only for control function A and I: Pressurize lower control air connection with compressed air (5 bar).
→
Screw actuator on the nipple
6
out of the valve body
1
.
→
Vent actuator.
english