Piston compressors, oil free
These continuously rated oil free piston compressor combine good around
performance with low cost and have the advantage of delivering the greater
pressure required for deeper rearing tanks and ponds than diaphragm compressors.
They are capable of delivering up to 5 psi, thus making then suitable for use
in depths up to 3 metres without undue loss of performance, assuming a low
resistance diffuser or air stone is used.
The range covers 5 machines as follows :-