Burkert Type 2012 - Manual (Page 21)

21
Conversionofcontrolfunction
Type 2000, 2002, 2012
7.2 conversion from control function a (cfa) to
control function B (cfB)
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
35 1 Pressure spring
30 1 O-ring
5 1 Graphite seal
procedure:
→
Mount valve
1
on the body.
Caution!
danger through taut springs!
▶ Carefully open piston actuator!
→
Release cover
31
with special wrench until the springs are completely relaxed, holding up the actuator body
12
against the hexagon.
For information about the special wrench, see Chapter “8. Installation tools”.
→
for actuator size G (100 mm) and h (125 mm): Remove washer
40
.
→
Remove pressure springs
28 29
.
→
Remove position indicator
26
with Allen key.
→
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
.
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