Air compressor
Page 57
If you've noticed an error in this article please click here to report it so we can fix it.
An air compressor announced by Joy Manufacturing is named the Twistair and has a capacity of 105 Cu ft/min (2.9 cu m/min) .FAD at 100 psig (7kg/sq cm). The compressor is a singlestage, positive-displacement, oilinjected rotary-screw unit. It is claimed that the design virtually eliminates maintenance since the unit has no reciprocating parts, no valves or gears and the rotors do not have mechanical contact with each other.
Power for the compressor is supplied by a 30 hp foot-mounted, continuously rated, three-phase motor with V-belt drive. Automatic stardelta starting control is provided with a selector switch to give the user the choice of constant speed or auto-stop-start operation at will, The compressor is capable of continuous operation at full delivery on a 24hr basis.
All the components, including motor, control, oil separator and so on are assembled on a steel base and occupy a floor space measuring 61in. x 33in. (1549mm x 838mm). Overall height is 36in. (914mm). An optional version of the machine, mounted on an air receiver, is available.
Made by: Joy Manufacturing Co (UK) Ltd, Burlington House, Chesterfield, Derbyshire S40 1SB.
Price: £1076 ex works.