Safety Valve - Gardner Denver ESM 30 Original User Manual

8. Service and maintenance
Danger
Only perform checks and carry out work on the
screw compressor when the unit is out of operation
and depressurized!
Important
Never operate the screw compressor unit without
the air filter (even a short operating time without
this filter can result in considerable damage to the
machine)!
As a standard, the air filter is provided with a visual in-
take filter monitor (- 2 - Fig. 20), which indicates clog-
ging 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 chapter 8.3, maintenance item
W1 "Change of air filter cartridge". Check air filter at
least once a week or, if required, daily for the accu-
mulator 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 matter
such as SO , solvent vapours, etc.) have a strong
2
influence on the service life of the filters (air filters, oil
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.
44
8.8

Safety valve

2
1
Fig. 21 a
Fig. 21 b (only for dryer option)
1 Safety valve
2 Valve cap
3 Safety-valve for optional refrigeration dryer
Testing the safety valve
The valve should be tested on a separate compressed
air line in accordance with local legislation.
Operate the safety valve (- 1 - Fig. 21), depending on
the type of valve:
Slightly turn the valve cap (-2- Fig. 21) (1-2 turns),
•
and then re-close it.
Actuation of the bleeding lever/pulling ring
•
Danger
Never operate a screw compressor system with a
defective safety valve or without safety valve!