WIKA CPB5000HP - Handbuch (Seite 12)

Pressure Balance High-Pressure GB
CPB 5000 HP
WIKA Operating Instructions Pressure Balance High-Pressure Version 2.3 12
3.1.2 Installing the piston cylinder system .
Before releasing the closure plug in the piston receptacle, ensure that the
system (spindle pump turned back completely counter-clockwise, open high-
pressure shut-off valve, open low-pressure shut-off valve) is depressurised.
Note: The closure plug serves to seal off the piston receptacle from oil leaks, or
from any penetrating contamination. It may not be pressurised under any
circumstances.
Remove transportation lock; please keep this lock for transportations (e.g. for re-calibration) see
section 3.4)
Before installing the piston/cylinder system the piping must be vented. For this purpose oil from the
reservoir has to be pumped into the system by operating the initial pressure pump carefully.
Pressure is admitted as long as the oil reaches the sealing cone inside the opened piston fixture
and as long as no air bubbles escape.
For this the low-pressure shut-off valve (LP) must be closed, the high-pressure shut-off valve (HP)
must be opened and a blind plug must be mounted into the connection for test specimen.
The piston/cylinder system is inserted vertically into the thread of the piston receptacle, and firmly
tightened using a flat wrench with SW 46.
Additional sealing elements are not required. Sealing is performed purely metallic using a sealing
cone.
For an exact alignment of the device, the water level may be removed from the basement plate and
placed on the top of the screwed-in piston/cylinder system. This will ensure the most accurate
referencing of the piston/cylinder system.
Here put on
water level