Pressure Relief Valve - Gardner Denver L Series Original User And Service Manual

Fig. 20
1 Air intake filter
2 Intake filter monitor (visual)
As a standard, the air filter is provided with a visual in-
take filter monitor (-2- Fig. 20), which indicates clogging
of the air filter cartridge.
When the red service field of the intake filter monitor is
visible and remains clicked into position while the screw
compressor is out of operation, replace the air filter
cartridge.
However, the air filter cartridge should be replaced at
the latest as specified in Section 10.3. Check air filter at
least once a week or, if required, daily for the
accumulator of dust. When carrying out maintenance
work, make sure that no dirt gets to the clean air side of
the air filter.
Changing intervals for air filter cartridge
The operating conditions (e.g., coolant temperatures),
the operating modes and the quality of the intake air
(e.g., content of dust, content of gaseous foreign
substances such as SO and solvent vapors, etc.) have
2
a strong influence on the service life of the filters (air
filters, water filters, fine separators).
Where such conditions exist the filter element may
require changing more frequently.
Change the air filter as follows:

Pull snap latch outward and remove housing base.

Detach air filter cartridge while slightly turning it.

Carefully insert new air filter cartridge in the housing.

Close air filter with housing base. The snap latches
must click into position.

10.8 Pressure relief valve

DANGER
When checking pressure relief valve there is
an explosive release of pressure.
Failure to perform this operation in a safe
manner or without safety equipment
may result in personal injury or death.
 Use the appropriate safety equipment,
hearing and eye protection, and use
safety precautions when performing this
PRV check on an operating machine.
2
1
Fig. 21
1 Pressure relief valve
2 Pull ring
The pressure relief valve has no user serviceable or
repairable components.
Testing the pressure relief valve
The valve can be tested:
1. On a separate compressed-air system.
2. When raising the system operating pressure
to its normal level.
3. Operating the pull ring.
Keep local legislation in mind when testing.
If the pressure relief valve doesn't close itself or is
leaky, close the doors of the compressor and push the
Stop Button. After the pressure in the pressure
reservoir is reduced to ambient pressure, renew the
pressure relief valve.
13-25-639 v00 Page 49