This Nitech Inc Steam Graphite Ejector Diffuser is in good condition and guaranteed to function 100%. We can accept pay pal or your credit card. Please contact me with any questions. FOR NITECH EJECTOR STAGE 2 OF 2 100 LB STEAM .938 INCH DIAMETER Single-Stage Steam Jet Ejectors are based on the ejector-venturi principle. In operation, steam issuing through an expanding nozzle has its pressure energy converted to velocity energy. A vacuum is created and the high velocity of steam entrains air or gas and the mixture of gas and steam enters the converging end of the venturi, passes through the diffuser where its velocity energy is converted into pressure sufficient to discharge against a predetermined back pressure.