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These 3-way valves are used for gas defrost only. One or more compressors are used to provide refrigeration for a multiple of refrigerated cases, both medium and low temperature. The 3-way valves are used to control the flow of gas off a discharge header to the various cases or suction gas from the cases to the suction header. The 3-way valve body is take-apart construction, as is the pilot valve, and both may be completely serviced in the field. Since the pilot valve is 2-way and normally closed, the main valve failure mode from electrical failure or coil failure will be in the refrigeration mode. It should be remembered when applying these valves that the flow of discharge gas is completely blocked off when the pilot valve is de-energized. Therefore these valves can only be applied off a discharge header and not in the main discharge line.