Line of two-stage, oil-sealed rotary vane pumps range in flow rate from ~141 to 2295 ft3/hr (4 to 65 m3/hr). They are suited for use in analytical instruments and semiconductors as well as the chemical, vacuum coatings and power industries. The industrial pumps use high quality mineral oil, have an adjustable gas ballast, and an anti-suck-back design that protects products from oil contamination in the event of an unexpected shutdown. Also, the company offers an expedient, twin-cylinder refrigerant recovery unit with one-key operation and an oil-free compressor suitable for all common refrigerants. The unit has a self-purge function to prevent refrigerant mixing as well as built-in protection against high pressure for added safety.