Free vacuum pump is a rotary positive displacement pumps shall be fit before the pump is intended for use in a wide range of pressures greater pumping speed to be pumping gas contains insensitive to dust and water vapor are widely used metallurgy, chemical industry, food, electronics coating and other industries. There are WLW series of vertical oil-free vacuum pump, W-type reciprocating pumps, 2X, 2XZ type rotary vane vacuum pumps, ZJ, ZJH Roots vacuum pump (ZJH type vacuum pump for the patented product produced), 2SK, SK water ring vacuum pump , 2BV, 2BA type water ring vacuum pump, H, 2H-type slide valve vacuum pump, TLZ type vacuum pump, SL-type blower, JZJHX Roots rotary vane vacuum unit, JZJHS Roots water ring vacuum unit, JZJHWLW Vertical oil-free vacuum unit, JZJP Roots water jet vacuum unit, JZJHBA Roots water ring vacuum unit, RPP-type water jet pump, JZJH2H Roots rotary piston vacuum unit models. Claw rotor dry mechanical vacuum pump (also referred to claw pump) in the pump housing having two conjugated engagement claw rotor. Similar Roots vacuum pump rotor by a pair of synchronized precision gear to drive the rotary and fixed phase. By the sixth cycloid rotor profile and arcs without contact between the rotor and the rotor and the pump casing claw vacuum pumps, leaving a slight gap. Intake and exhaust gas outlet are located in the end face of the pump casing, respectively, by the timing of the two rotor end cyclical opening and closing the valve has a regulatory role. Claw dry mechanical vacuum pump rotor machine type is divided into vertical and horizontal. Edward horizontal structure developed by a Roots rotor plus three claw rotor DP80 mechanical vacuum pump represented. Roots rotor high vacuum suction stage compressor rotor claw claw vacuum pump exhaust level picture, this arrangement can be high pumping speed at low inlet pressure. Its ultimate pressure up 1Pa less. Pumps feature of this structure is that the whole center of gravity low claw vacuum pumps, the gap between the rotor and the spacer at all levels is easy to adjust. In order to obtain a larger pumping speed at low pressure pump suction roots level to do better than the claw-shaped exhaust level is 50%. In order to avoid during the roughing pump generates between groups "overpressure" between Roots and intermediate level has a large claw transmission space as a pressure buffer space. It also can be installed level between overpressure safety valve to ensure reliable operation. In order to facilitate pumping of water vapor in the exhaust pump gas ballast valve is provided. Pump drive the same type and Roots vacuum pump. Through the above analysis, the claw-shaped rotor dry mechanical vacuum pump also has the advantages Roots vacuum pumps and rotary vane vacuum pump. Claw vacuum pumps _ _ claw vacuum pumps Vacuum Equipment Co., Than Shwe Shwe by Zibo Vacuum Equipment Co., Ltd. Than Shwe Zibo Vacuum Equipment Co. (www.zbdrzk.com) strong, credible, in Shandong Zibo vacuum pump industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Shwe Vacuum Equipment Co., into the brilliant and you work for a better future!