Burkert Type 2012 - Manual (Page 24)

24
Conversionofcontrolfunction
Type 2000, 2002, 2012
7.4 conversion from flow above the seat to flow
below 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 1 or 2 Pressure springs
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, stronger springs.
→
for actuator size G (100 mm) and h (125 mm): Install new outer spring
29
in addition to the existing inner
spring
28
.
→
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