WIKA CPB5000HP - Handbuch (Seite 13)

Pressure Balance High-Pressure GB
CPB 5000 HP
WIKA Operating Instructions Pressure Balance High-Pressure Version 2.3 13
3.1.3 Connecting the test specimen .
Before releasing the closure plug in the test specimen 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 test specimen receptacle from oil
leaks, or from any penetrating contamination. It may not be pressurised under
any circumstances.
The test specimen connection has a knurled nut with a G ¾ female thread, in which various
threaded connecting adapters may be screwed into. 3 threaded adapters with the following
connector threads are included in the scope of supply as standard equipment:
M16 x 1.5 male
M20 x 1.5 male
9/16-18UNF male
A connecting adapter with G ½ female thread with an O-ring seal is available as an
accessory. The maximum pressure permitted with the use of this adapter is limited to
1600 bar.
First, install the matching threaded adapter on your test specimen.
Before installing the test specimen 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 test specimen
connection 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 the piston/cylinder system must be mounted.
Then connect the test specimen, including the installed threaded adapter, to the knurled nut of the
test specimen connection at the pressure balance. The free-running knurled nut enables the
orientation of the test specimen. Firmly tighten the knurled nut and the threaded adapter with a flat
wrench in the desired clamping position. The wrench width for the knurled nut and the threaded
adapter is SW 36.
Additional sealing elements are not required. Sealing is performed purely metallic using a sealing
cone.
Threaded adapter
Knurled nut