Mechanical Purgers have been around since their invention and patent in 1940 by Armstrong. They are designed to remove non-condensable gases from refrigeration systems by the density difference between the liquid refrigerant and gases. As the name implies, its operation is mechanical, no automation, no electronic controls. This style of purger requires an operator to open and close valves in order to start and stop the purging operation in a refrigeration system. The mechanical purger has been used successfully in many refrigeration systems and for many refrigerants over the decades since its invention. Today, the mechanical purger is used primarily in applications where there is no electricity at the point of use or in hazardous applications where electric components are not allowed. Mechanical purgers are available as a single unit that must have the piping assembled at the point of use, or,as a completely packaged unit that only need to be mounted and minimal connections made. The standard mechanical purger is cast stainless steel.

Armstrong also offers a retrofit package for existing, older Armstrong systems. Consult the factory or your Armstrong Representative.