Detailed Product Description Specifications for CNG Compressor:D-0.28/(30~76)-250Medium: Pure natural gasMode: D-type little-lubrication reciprocating piston modeStage ... , 740 r/min, 380V, 50 Hz, d II BT4Oiling motor: 0.55 kW, 380V, 50Hz, d II BT4Weight:Size: 4000X2400X2700mmLife of suction and discharge ...