Working Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous pace within the pump housing for suction and exhaust of gasoline. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in specific relative positions. These are near to each other and to the housing with out real contacting, so lubrication is unnecessary in the working housing. The carefully balanced working elements and substantial precision bevel wheels ensue the pump be operated stably and continuously beneath the issue of high-pressure variation. Dynamic seal part uses our patent technological innovation and imported oil seals, the vibration quantity of shaft to the shaft seals is managed to less than 0.02mm. A gravity valve is put in concerning the suction and exhaust part of the pump. The perform of your gravity valve is as follows, when the stress variation between the suction and exhaust aspect is above the weight on the valve, the valve opens immediately, which makes the strain difference generally continue to keep inside a fixed controllable worth, the value is definitely the allowable highest pressure distinction to be sure the pump work generally and to ensure that in reality, the roots vacuum pump with overflow valve can be a form of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially larger pace at reasonably lower inlet strain and it really is possessed overload self-protective perform. Because it can be a pump of dry clearance seal building, if a specific pumping pace rate 15 and an ultimate vacuum have to be obtained, it really is required to provide a lower inlet pressure for minimizing the back movement, hence, a pump should be backed in use, roots vacuum pump needs to be started out soon immediately after its inlet pressure reaches a permissible worth for economization. It truly is permit to select unique kinds of pump as the backing pump for factual demands, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing huge volume of vapor, the liquid ring vacuum pump is definitely the best backing pump.