3000PB, 3700B, 4500B, 3000PVB, 3700VB, 4500VB User Manual 2: Description
02250216-786 R01
Subject to EAR, ECCN EAR99 and related export control restrictions. 17
2.7 Air inlet system, functional
description
Refer to Figure 2-6. The compressor inlet system con-
sists of a dry-type air filter, a restriction gauge and an air
inlet val
ve.
The restriction gauge (located on the air filter) indicates
the
condition of the air filter by showing red when filter
maintenance is required.
The poppet-type modulating air inlet valve directly con-
trols the amount of air intake to the compressor in
r
esponse to the operation of the pressure regulator.
Refer to Section on
page 15. The inlet valve also acts as
a check valve, thus preventing
reverse rotation when the
compressor is shut down.
WARNING
“The Plastic Pipe Institute recommends against
the use of thermoplastic pipe to transport com-
pressed air or other compressed gases in
expo
sed above ground locations, e.g. in exposed
plant piping.”
1
Sullube
®
should not be used with PVC piping sys-
tems. It may affect the bond at cemented joints.
Cer
tain other plastic materials may also be
affected.
1
Plastic Pipe Institute, Recommendation B. Adopted
January 19, 1972.
Figure 2-6: Air inlet system
1. Air inlet filter 4. Separator/sump tank
2. Air inlet 5. Restriction indicator
3. Compressor unit
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