Bürkert 2012, Руководство по обслуживанию

Страница: 24 / 41

24
Conversion of control function
Type 2000, 2002, 2012
9.2 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 Pressure spring
30 O-ring
5 Graphite seal
Procedure:
→
Mount valve
1
on the body.
→
Pressurize lower control air connection with compressed air (5 bar). Valve opens.
→
Screw actuator on the nipple
6
out of the valve body
1
.
→
Vent actuator.
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 “10 Installation tools” .
→
For actuator size G , H: Remove washer
40
.
→
Remove pressure springs
28 29
.
→
Remove position indicator
26
with Allen key.
→
Carefully screw in actuator on the swivel plate
3
(only put pressure on the upper section of the swivel
plate).
→
Release nuts
25
.
english