Burkert Type 2012 - Manual (Page 25)

25
Conversionofcontrolfunction
Type 2000, 2002, 2012
7.5 conversion from flow below the seat to flow
above the seat
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
28, 29 2 Pressure springs for actuator C (40 mm), D (50 mm), E (63
mm), F (80 mm)
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”.
→
Remove and / or insert pressure springs
28 29
depending on actuator.
→
for actuator size c (40 mm), d (50 mm), e (63 mm) and f (80 mm): Remove pressure springs and insert
new, weaker springs.
→
for actuator size G (100 mm) and h (125 mm): Remove outer spring only
29
inner spring
28
remains in
the actuator.
→
Mount cover
31
and screw tightly with special wrench.
→
Check the valve for function and leaks.
Note changed direction of flow and changed pressure range!
english