One, ZJP Roots pump Overview: Roots vacuum pump is a rotary positive displacement pumps. It is evolved from the Roots blower. Depending on the scope of work Roots vacuum pump, is divided into vertical atmospheric low Roots vacuum pump; Roots vacuum pump (also called mechanical booster) and high vacuum multi-stage Roots pump. In general, the Roots pump has the following characteristics: in a wide pressure range greater pumping speed; starting fast, able to work immediately; not sensitive to dust and water vapor contained in the gas to be drawn; the rotor does not have to lubricate, oil-free pump chamber; vibration, rotor balancing conditions were better with the exhaust valve; small drive power, small mechanical friction losses; compact, small footprint; low maintenance costs. ZJP series ZJ series Roots Roots vacuum pumps and the same can not be used alone, there must be pre-series vacuum pump until the pressure in the system is pumped to be able to get pre-Roots vacuum pump inlet pressure when you can afford to start work otherwise it will overload and overheating and damage. Generally 2BV water ring vacuum pump, 2X-type rotary vane vacuum pumps, vacuum pump is mainly composed of Roots Roots type most commonly used vacuum unit of the company has: ZJ / ZJP-30 ZJ / ZJP-70 ZJ / ZJP-150 (A ) ZJ / ZJP-300 ZJ / ZJP-600 ZJ1200A Kai Qing Shanghai Pump Manufacturing Co., Ltd. is a company specializing in research, manufacture, production and sale of pumps technology companies. The main products are: vacuum pump, vacuum unit series, series water ring vacuum pumps, rotary vane vacuum pump series, Diaphragm series, submersible mixer series, the most professional vacuum pump manufacturer Shanghai direct selling, all three bags of products, and look forward to you cooperation, please call the free service hotline: 4000-889-202.