... DF-0.3/(2-4)-210 Type Natural Gas Compressor1. Main SpecificationsDF-0.5/(2-4)-210 type natural gas compressor adopts D ... and cylinder;spray lubrication Packing and cylinder: little oil lubrication16) Gas Transmission Temperature: ≤55°C17) Noise Level: ≤85dB(A)18 ... stage 4, explosion-proof control case, controlling components, gauge, gas system, transmission system, metal protection case and skip-mount ...