15
WIKA operating instruction, model CPP120-X
EN
08/2020 EN/DE
4. Design and function
4.3 Pressure supply
The CPP120-X requires a regulated pressure supply of clean dry gas to operate.
Any compressed pressure supply represents a supply of considerable potential energy
and as with electricity precautions must be taken to prevent accidents.
WARNING!
Physical injuries and damage to property and the environment caused
by incorrect pressure supply
Improper handling can result in considerable injury and damage to
equipment.
▶
Use only dry, clean and oil-free gases (e.g. Nitrogen cylinder).
▶
Use a pressure reducer to reduce the supply pressure. The supply
pressure should be just above the required working pressure max. 120 bar
[1.740 psi].
▶
Do not use oxygen in the tester.
▶
If no suitable supply is available use a hand pump for pressure or vacuum
supply.
4.4 Function
Operation of the CPP120-X is by controlling the supply/release of a pneumatic
pressure/vacuum supply by the inlet valve
3
and the outlet valve
4
. With the use of
the two control valves (and if applicable the system pressure gauge) the operator can
approximately reach the required pressure.
To achieve the exact required pressure the volume adjuster
5
should be rotated
clockwise or anti-clockwise to increase or decrease pressure. To release the test pressure
the outlet valve
4
has to be turned anti-clockwise.
No excessive force is required on the control valves and or volume adjuster to achieve the
desired results.
