... protection, skid mount package, metal protection case, operation gauge system, appliance device, etc.1) Model: DF-0 ... 37kW Voltage/phase/frequency;440V/3PH/60HZExplosion-proof level: ExdIIBT4Protection level: IP54Insulation level; F3. Automatic Control1) The compressor adopts ... stage 4, explosion-proof control case, controlling components, gauge, gas system, transmission system, metal protection case ...