Bellows piston driven by air pressure and automatically open and close valves, metal metalworking become effective blast equipment. Fresh air ventilator is a new ventilation equipment, which uses two-way ventilation air box, the fresh outdoor air (fresh air) into the interior, but also the polluted indoor air (old style) discharged to the outside. Fresh air into the room through the air filter to protect the indoor air clean. Due to the winter and summer a large temperature difference between indoor and outdoor htfc wind chassis, not because of a two-way ventilation for indoor temperature caused large fluctuations in the fresh air ventilator is set to air heat exchanger, so that the old style and new style switching temperature, achieve both ventilation and also maintain the basic stability of the effect of indoor temperature. Shenyang wind chassis | wind chassis | Rich ventilation provided by Dezhou Plumper ventilation plant. Dezhou Plumper ventilation plant (0) strong, credible, in Dezhou fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Plumper ventilation equipment into the brilliant and you work for a better future!