Yeomans Chicago Corporation Yeomans Pump® Series 7000 Model 668

It is the use of the proper cooling method in your specific compressor application that will insure you of the greatest economy in initial cost and operating efficiency. That's why Yeomans has three basic rotary air and gas compressors: air- cooled, fan-cooled, and water-cooled. The capacity of these units extends up to 300 c.f.m. and pressures up to 5O psi or for moderate vacuums up to 27" of mercury (or 95% of barometric pressure). Since they are of the positive displacement type, these units can­not be operated with a closed discharge. Air storage or cushion tanks are required only where automatic start-and-stop control is needed because the discharge from the units is pulsation-free.