Within the compressor body there are two screws with matting profile: a female and a male screw, female having concave inlets and the male with convex helical inlets. The screws rotate in opposite directions with the female screw receiving the driving power and transmitting this power to the male screw through a set of synchronization gears.

As the screws rotate, the air is drawn into the inlet port and fills up the space between the screws. This phase is the Admission. The key phase is the Compression. It starts when the end of a male thread blocks the end of a female thread. The volume available between the compressor body and these two threads then progressively decreased during rotation. When this volume merges into the delivery outlet of the compressor, the third phase takes place, hence the Exhaust.

Throughout this process, there is no contact between the screws. This means no wear, total reliability, and non-pulsating air delivery. These compressor/blowers can be used in either a Mobil or stationary application and can be driven by a PTO, electric motor, or hydraulic power system. A complete range of dedicated ancillary product is available to support this product line.

> Blackmer's Screw Compressors