Exhausters & Compressors

Figure 420 Jet Compressor with threaded pressure connection and flanged suction and discharge connections
Sectional drawing of Figure 425 Jet Compressor with manually-controlled spindles
Figure 427 Jet Compressor with manually-controlled spindle and flanged connections

Gas Jet Compressor

Principle of Operation

Gas Jet Compressors are a type of ejector that use a jet of high-pressure gas as an operating medium to entrain a low-pressure gas, mix the two, and discharge at an intermediate pressure. Gases can be steam, air, propane, and others.

Fig. 420 Gas Jet Compressors are flanged and have no regulating spindle. The pressure connection is threaded, the suction and discharge connections are flanged, and the nozzle is threaded into the body for easy removal and maintenance. The Fig. 425 Gas Jet Compressor has all threaded connections and is equipped with a manually-controlled spindle which is used specifically when the unit operates at a steady load but where flexibility of the nozzle orifice is desired to compensate for changes in operating conditions. The Fig. 427 Gas Jet Compressor is the flanged version of the Fig. 425.


Fig. 420, Fig. 425 and Fig. 427 Gas Jet Compressors have no moving parts. They can be manufactured from any machinable or castable material. Large units can be fabricated from any materials which are available in plate and are weldable. They can be installed in any position. Due to velocities involved, good mixing of dissimilar gases is obtained. Gas Jet Compressors can replace mixing valves and at the same time boost pressure which replaces a compressor. Gas Jet Compressors can reduce boiler steam demand or enhance the capacity of an existing boiler.


For more detailed information about Gas Jet Compressors, Bulletin 4F and Bulletin 4F Supp. Literature.

To submit a Request for Quote (RFQ) for Gas Jet Compressors, Adobe PDF or submit an online interactive RFQ Form for Gas Jet Compressor / Thermocompressor.

Schutte & Koerting, 2510 Metropolitan Dr., Trevose, PA 19053, USA
Tel: (215) 639-0900 Fax: (215) 639-1597 Email: