Air Driven Air Amplifiers, AA-8, AA-15 & AA-30 • OM-15J
2
Introduction
This operation and maintenance manual has been prepared to assist in the installation, operation and
general maintenance of single acting single stage Haskel Air Amplifier models AA-8, AA-15 and AA-30.
They provide a means of boosting plant air or nitrogen gas to higher pressure at low flow.
Description
The drive is an automatic cycling reciprocating motor cycled by an unbalanced pilot operated spool valve.
The drive is directly connected to an integral pumping piston with inlet and outlet check valves. All three
models use the area ratio of the large drive piston vs. the small pump piston to boost inlet pressure. This
ratio is approximately indicated by the model number. Therefore, a model AA-8 can theoretically increase
its pump inlet pressure to 8 times the drive pressure, model AA-15 about 15 times, model AA-30 about 30
times.
Performance
Multiplying the model number x the air drive pressure simply estimates the approximate output pressure
at no flow (Stall). However, with output flow, output pressure will be lower as can be seen from the
individual model data in the catalog.
Compression Ratio vs. Efficiency vs. Service Life
Compression ratio is pump output vs. pump inlet pressure (psi absolute). Note: This is completely
unrelated to the “Area Ratio” discussed above.
Volumetric efficiency goes down in direct proportion to the compression ratio. It drops below 50% at about
12:1 compression. (e.g. Model AA-30 boosting to 2400 psia from 200 psia inlet). Therefore in continuous
duty applications, the pump output vs. pump inlet compression ratio should be as low as practical for best
service life.
Shop Air Moisture
A serious limitation to boosting typical shop air to high pressure is moisture concentration resulting in
short service life in the pump section. In general, if more than 600-800 psi output is needed dry nitrogen is
more practical. Consult catalog for more specific dryness level data.
Installation
All models may be mounted in any position. The exhaust muffler has been positioned at assembly to blow
cold air across the pump section. Do not change the position of the muffler.
Lubrication
It is not necessary or desirable to use an air line lubricator. Cycling valve spool and drive air barrel have
been pre-lubricated at the factory. Occasional relubricating of the spool o-rings (fig.2 #3.) is suggested
using P/N 50866 lubricant.
No lubricant of any kind is used in the pump section.
