Working Principle and Options: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent pace within the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in specified relative positions. These are close to to each other and also to the housing with out real contacting, so lubrication is pointless in the working housing. The thoroughly balanced operating parts and substantial precision bevel wheels ensue the pump be operated stably and continuously below the ailment of high-pressure variation. Dynamic seal portion utilizes our patent technological innovation and imported oil seals, the vibration quantity of shaft about the shaft seals is managed to much less than 0.02mm. A gravity valve is put in amongst the suction and exhaust a part of the pump. The function of your gravity valve is as follows, once the strain difference between the suction and exhaust element is in excess of the excess weight on the valve, the valve opens immediately, which helps make the strain difference often preserve within a fixed controllable worth, the worth may be the allowable highest stress variation to make sure the pump get the job done generally and to ensure that in fact, the roots vacuum pump with overflow valve is really a type of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially greater speed at rather lower inlet stress and it is actually possessed overload self-protective perform. Because it is really a pump of dry clearance seal construction, if a certain pumping pace fee 15 and an greatest vacuum have to be obtained, it is necessary to provide a lower inlet pressure for lowering the back movement, therefore, a pump should be backed in use, roots vacuum pump should be started off soon immediately after its inlet strain reaches a permissible value for economization. It is actually permit to pick different types of pump as the backing pump for factual specifications, such as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing huge volume of vapor, the liquid ring vacuum pump will be the great backing pump.