These Nitech Inc Steam Graphite Ejector Diffusers are in good condition and guaranteed to function 100%. There are varying models, quantities, and diameters so please inquire for more information. Stage 2 of 2 and stage 2 of 3 available. Listed below are the models that are for sale as well as their quantity. Diameters generally range between .656 to .875 inch diameter.We can accept pay pal or your credit card. Please contact me with any questions. 027831 qty 3 027729 qty 2 335055 qty 3 Nitech 396099 Diffusers for Ejector For Nitech Ejector, stage 2 of 2 120 lbs steam MOC: Graphite 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.