The SM series screw compressors are designed with weatherproof features for any outdoor construction applications. It has combined safety with outstanding durability in the most demanding environments. The SM series features an explosion-proof switch and can be used on mining surfaces or directly underground where gas outbursts may occur. Since fewer pipelines are needed to supply gas from the ground to the underground, there is decreased pressure loss from transfer, decreased leakage loss, and decreased gas loss caused by the condensation of water from decline of compressed gas temperature in the long pipelines. The easy-access design lowers maintenance costs while the top-quality components deliver the utmost reliability and maximum uptime.