... use modified PTFE sealing ,material, is suitable for various refrigerant and lubricant, with good sealability.5, SGN/SGR type ... Function and characteristicsSGN/SGS type: SGR type: 1, Used for HCFC/HFC refrigerant. 1, CFC/HFC refrigerant2, Showing ... Have liquid level in reservior3, Without condensate depression indication for refrigerant liquid. 3, Liquid level in compressor crankcase4 Showing ...