Burkert Type 2012 - Manual (Page 13)

13
Replacingthesealset
Type 2000, 2002, 2012
→
for control function a: Remove pressure springs
28 29
.
→
Remove position indicator
26
with Allen key.
→
for control function a (cfa): Pressurize lower control air connection with compressed air (5 bar).
→
Screw actuator on the nipple
6
out of the valve body
1
.
→
Carefully screw in actuator on the swivel plate
3
(only put pressure on the upper section of the swivel plate).
→
Release nuts
25
.
→
Remove pistons
22
with supporting washer
24
.
the following operations must only be carried out with valves without identification “R”:
→
for control function a: Remove filler piece
19
with intermediate washer
20
and O-ring
21
.
→
for control function B: Remove intermediate washer
20
, O-ring
21
and pressure spring
35
.
→
for control function i: Remove filler piece with intermediate washer
20
and O-ring
21
(spring
35
missing).
→
Remove spindle
2
from actuator body
12
and clean spindle thread.
→
Clamp actuator on the nipple hexagon
6
.
For actuator size D (50 mm) the tube
8
is screwed and sealed in the nipple
6
.
→
Release and remove screw
18
with socket spanner.
→
Remove disk springs
17
.
→
Remove actuator body
12
.
→
only actuator size c (40 mm): Replace O-ring
11
.
Reinforcing ring
10
remains on the tube
8
.
→
Slide packing gland set
7
,
13
,
14
,
15
,
16
carefully out of the tube
8
. Take care that the tube is not
damaged.
→
Clean all replacement parts thoroughly after removal.
6.1.2 assembly
Rebuild packing gland set based according to the drawing:
→
Lubricate new wiper with silicone grease OKS 1110-3 and insert into the tube
8
.
→
Lubricate individually chevron seal
13 14
liberally with silicone grease OKS 1110-3.
english