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

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 SO2 and solvent vapors, etc.)
have 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.
Check the air filter
1. Switch OFF the main disconnect switch and secure it against switching on again.
2. Open the enclosure, create access.
3. Check filter elements.

Replace filter elements if heavily soiled.
4. Close the enclosure.
Change the air filter element
Property damage
Operating the compressor without an air filter, even for a short time, can cause severe damage to the
compressor.
 Never operate the compressor without an air filter.

Dirt must not be allowed to enter the clean air side of the air filter!
1. Switch off the main disconnect switch
2. Open the enclosure, create access.
3. Release pressing frame.
4. Replace filter elements.
5. Attach pressing frame (hexagonal screw tightening torque < = 8Nm / 71 ft. lbs.
6. Close the enclosure.

8.6.7 Pressure Relief Valve

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 Pressure Relief Valve check on an operating machine.
 A defective pressure relief valve may result in pressure that is too high, breaking open parts of the
system and causing serious or fatal injury.

Never operate a screw compressor system with a defective pressure relief valve or without
pressure relief valve!
NOTICE
DANGER
13-25-640 v00 Page 60