SN55, SN55S, SN55V, SN75, SN75S, SN75V User Manual
4: Installation
02250247-571 R04
Subject to EAR, ECCN EAR99 and related export control restrictions.
58
4.4.1
Pipe sizing
Pipe should be sized at least as large as the discharge
connection of the compressor. Piping and fittings should
all be suitably rated for the discharge pressure.
4.4.2
Use of auxiliary receiver tank
An auxiliary receiver tank should be used in cases where
large demand swings are expected. Isolation Valve(s) If
isolation of the compressor from the service lines is
required, isolation valves should be installed close to the
discharge of the compressor. They should be installed
with drip legs that drain sloping downward from the base
in order to drain properly. Install a vent to the piping
downstream of the compressor outlet connection.
When two compressors are operated in parallel, provide
an isolation valve and a drain trap for each compressor
before the common receiver.
A built-in aftercooler reduces the discharge air tempera-
ture below the dew point. For most ambient conditions,
considerable water vapor is condensed. To remove the
condensation, each compressor with built-in aftercooler
is supplied with a combination condensate separator/
WARNING
The use of plastic bowls on line filters and other
plastic airline components without metal guards
can be hazardous. Synthetic coolants or the
additives used in mineral oils can alter their
structural integrity and create hazardous condi-
tions. Metal bowls should be used on any pres-
surized system for safety concerns.
“The Plastic Pipe Institute recommends against
the use of thermoplastic pipe to transport com-
pressed air or other compressed gases in
exposed above ground locations, e.g. in
exposed plant piping.”
1
Sullube
®
should not be used with PVC piping
systems. It may affect the bond at cemented
joints. Certain other plastic materials may also
be affected.
1
Plastic Pipe Institute, Recommendation B. Adopted
January 19, 1972.
Figure 4-1: Service air piping—typical installation
1. Sullair compressor
4. Sullair filter
7. Standard gate valve
2. Sullair dryer
5. Water leg drain valve
A1. Customer connections
3. Shut-off gate valve
6. By-pass gate valve
A2. Customer connections
