VMAC - Vehicle Mounted Air Compressors
VMAC Technical Support: 888-241-2289
VMAC Knowledge Base: kb.vmacair.com
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The VMAC WHASP Tank has a built-in check valve. Use of an
additional check valve is not required and may cause erratic
performance.
Air Compression
The G300004 uses a VMAC designed and manufactured flooded lobe, rotary
screw compressor. The oil filled compressor housing contains 2 rotors. Compression
occurs when air (at normal atmospheric pressure) enters a chamber where it is
trapped between meshing rotor lobes. Cooled oil is injected into the rotors during
compression to lubricate the rotors and bearings, absorb the heat of compression,
and seal the rotor lobes to allow for efficient compression. As the rotors rotate, the
meshing lobes compress the volume of the trapped air/oil mixture before sending
it down the discharge line to be cooled and separated by the Waste Heat Air
Separation Package (WHASP) Tank.
Oil Separation and Cooling
The WHASP Tank is a 2 stage air/oil separator and oil cooler. The hot air/oil
mixture from the compressor enters the cooler at the top of the WHASP Tank
where the mixture is cooled and the majority of the oil separates from the air
and settles into the reservoir tank below the cooler (first stage separation). The
cooled oil then passes through a high pressure oil filter before being returned
to the compressor via the oil return line. The air stream then passes through a
coalescing filter where the remaining oil is removed (second stage separation). The
oil collected by the coalescing filter is returned to the compressor via the 1/4 in
PTFE scavenge tube.
A liquid to air cooler with electric fan maintains the operating temperature
which reduces the temperature of the compressed air and increases the system’s
durability.
Minimum Pressure Check Valve
The WHASP Tank has a built-in minimum pressure check valve (MPCV) to maintain
a minimum pressure of approximately 60 psi (414 kPa) in the WHASP Tank, this
ensures there is adequate compressor lubrication, cooling, and oil separation in the
coalescing filter. Air will not flow out of the WHASP Tank until approximately 60 psi
is reached. The MPCV is factory set and requires no adjustment or servicing.
Operating Principles