... 1. Semi-hermetic piston compressorCopeland semi-hermetic piston compressor;Copeland has rich ... gauge, pressure controls, motor overheat protector, junction box(IP55).Accessories of NJ-BF10Z, NJ-BF20Z, NJ-BF25Z:Copeland semi-hermetic piston ... compressor, oil separators, air-cooled condenser, axial flow fan, liquid reservoir, filter drier, high pressure gauge, low pressure gauge, oil pressure gauge ...