Roots vacuum biggest advantage is a high rate of Roots vacuum pumping at low inlet pressure, but it can not be used, there must be a stage-stage pump series is pumped until pressure in the system is pre-vacuum pumping When allowed to Roots vacuum population pressure, vacuum pumps to start working Hebei Roots pump prices, and in general, do not allow Roots vacuum pressure differential at work Hebei Roots vacuum where the cheapest, otherwise it will overload and overheating damaged, so use Roots vacuum; reasonable selection must pre-vacuum pump, install the necessary protective equipment. Advantages Roots vacuum pump inlet pressure is lower still has a large pumping speed, but Roots vacuum pump can be used alone, must be supporting the use of pre-stage vacuum pump. When the current stage vacuum pump system pressure pumped Roots vacuum pressure allowed to start before start Roots vacuum pump. Depending on the operating pressure and process conditions, pre-stage Roots vacuum pump can be mechanical seal pumps, liquid ring vacuum pumps, reciprocating pumps and so on. Different types of pre-configured Houluo Ci vacuum pump can achieve the ultimate pressure is different. Hebei Roots Roots vacuum pump manufacturers _ _ Zhucheng East Machinery Co., Ltd. is provided by John Han Machinery Co., Ltd. Zhucheng East. Zhucheng East Han Machinery Co., Ltd. (www.dhlcfj.com) (www.dhlcfj.com) strong, credible, Shandong Weifang fan, ventilation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the East Han Machinery Co., Ltd. Zhucheng and you hand into the brilliant, for a better future!