Burkert Type 2012 - Manual (Page 10)

10
Replacingthevalveset
Type 2000, 2002, 2012
5 ReplacinG The valve seT
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
3 Swivel plate with PTFE seal
4 Pin
5 Graphite seal (packed)
3* Sleeves (only valve with spindle diameter 14 mm)
procedure:
→
Mount valve
1
on the body.
Caution!
danger through taut springs!
▶ Carefully open piston actuator!
→
only for control function a (cfa): 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 control function a (cfa): Pressurize lower control air connection with compressed air (5 bar).
→
Unscrew actuator on the valve body
1
.
→
Support swivel plate
3
with the help of a prism, knock out pin
4
with a pin punch and pull out swivel plate.
→
Mount new swivel plate
3
align and secure with new pin
4
.
note!
For valves with “R” sleeves
3*
, insert in swivel plate and align drilled holes.
english