Airmac Owner’s Manual
August 2006
© Glenco Manufacturing Pty Ltd
Page 17 of 44
Check the State Workplace Health and Safety Regulations and/or Local Council
Regulations regarding acceptable noise levels. To reduce excessive noise, use
vibration isolators, fit intake silencers, install remote air inlets, relocate the compressor,
or construct an enclosure or baffle walls.
Discharge and Condensate Piping
All piping, fittings, air receiver tanks, and so on connected to the compressor discharge
must be certified safe for the unit’s discharge pressure and temperature. Do not use
PVC plastic in the compressed air discharge line.
Use pipe thread sealant on all threads and assemble joints tightly to prevent air leaks
and energy wastage.
Mainline piping used to convey air throughout a system should be sized to
accommodate the maximum flow rate of the compressor (also referred to as it’s free air
delivery) in accordance with Table 1. Branch piping should be sized in a similar
manner, but the design flow rate should instead be based on the total air consumption
of the tools or appliances running off that branch.
To allow for vibration and to prevent piping stresses being transmitted to the
compressor, the connection between the unit’s discharge valve and the mainline piping
system should be made using a flexible air hose or coupling.
TABLE 1
RECOMMENDED PIPE SIZES FOR COMPRESSED AIR LINES
Length of Pipeline (metres)
Flow (L/m)
7.5
15
22.5
30
45
60
75
90
142
1/2”
1/2”
1/2”
1/2”
3/4”
3/4”
3/4”
3/4”
283
1/2”
1/2”
1/2”
3/4”
3/4”
3/4”
3/4”
3/4”
425
1/2”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
566
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
3/4”
708
3/4”
3/4”
3/4”
3/4”
3/4”
1”
1”
1”
849
3/4”
3/4”
3/4”
3/4”
1”
1”
1”
1”
991
3/4”
3/4”
1”
1”
1”
1”
1”
1”
1,132
3/4”
1”
1”
1”
1”
1”
1”
1”
1,670
1”
1”
1”
1”
1”
1”
1”
1”
2,236
1”
1”
1”
1”
1-1/4”
1-1/4”
1-1/4”
1-1/4”
2,830
1-1/4”
1-1/4”
1-1/4”
1-1/4”
1-1/2”
1-1/2”
1-1/2”
1-1/2”
Air hose should be sized in accordance with Table 2, and again with consideration as to
whether the hose is a distribution line or a branch line.
