Pressure Balance High-Pressure
CPB5000HP
3.2.5 Approaching the pressure value (decreasing pressure)
Turn the spindle pump anticlockwise to release pressure in the system.
If the pressure is close to the next test level, make the fine adjustment with the spindle wheel.
Caution:
The piston is lowered very quickly just before equilibrium is achieved.
Caution:
Do not remove masses completely from the piston/cylinder system under
pressure.
Caution:
Remove the masses individually and regulate the pressure gradually to the
same extent.
Once the spindle pump is turned back completely counter-clockwise, only the initial pressure
remains in the system.
Now the high-pressure shut-off valve can be opened.
Open the high-pressure shut-off valve only if the pressure in the system has
been relieved to initial pressure. For this purpose, always first turn the spindle
pump back completely counter-clockwise.
The initial pressure can be further relieved by carefully opening the low-pressure shut-off valve.
By completely opening the low-pressure shut-off valve, the initial pressure will completely escape
back into the tank.
The system is now completely relieved
Even if you wish to relieve the system from a high pressure completely down to
zero immediately, the spindle pump must first be completely turned back
counter-clockwise. Then open the high-pressure shut-off valve, and
subsequently open the low-pressure shut-off valve. The initial pressure then
escapes completely into the tank. The system is now completely relieved.
WIKA Operating Instructions Pressure Balance High-Pressure Version 2.5
GB
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