Dustcontrol DC 11 Serie Instrucciones Originales página 42

Service
Constant Speed(2a):
D
E
Constant Speed:
Adjusting the vacuum relief valve (not DC 11-Mo-
dule S models)
Th e valve is pre-adjusted with a negative pressure of
(18 kPa). If this needs to be adjusted the following
procedure should be used:
- Connect a manometer to the suction side and
measure with a fully closed inlet.
- Shut down the pump and demount the vacuum
relief valve.
- Remove the damper cover (1) and measure dis-
tance A.
- Loosen the locking nut (3)
2014-10-22
1.
4.
2.
3.
DC 11-Module - 42
Vacuum relief valve (not DC 11-Module S models)
Disassemble the vacuum relief valve (D). Clean
and lubricate shaft and bearings. Check the rubber
gasket (E). Change if cracked or harden ed (Part No.
4710).
Check the function of the hydraulic damper (F).
F
- Adjust the spring tension by turning the spring plate
(4).
Th e compression of the spring (2) determines the opening
pressure. Changing the distance A by 1.5 mm will give a
corresponding change in pressure of 1 kPa.
- Remount the valve after adjustment and test the
pressure.
- Inspect all cables and connections, repair if necces-
sary.
- Remount the protective panels, power up the
pump and give it a test run.
Part No 94153-D