... 4) SIMENS PLC Controller 1, Product Name: Nitrogen Machine/ N2 Gas EquipmentA full installation requires air compressor, refrigeration ... industry, Petro-gas & Oil field, Chemicals & Petro-chemicals, Coal-mine, Metallurgy, Pharmacy, SMT, Fire-resistance, lab, Air driving, ... Professional technologies ensure reliable gas supply. 11. Friendly human-machine interface. 5, Main Technical Parameters of ZR-3/ ...