Working Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent pace inside the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in certain relative positions. They are really close to to one another and to the housing without the need of real contacting, so lubrication is pointless while in the working housing. The cautiously balanced working parts and higher precision bevel wheels ensue the pump be operated stably and continuously beneath the ailment of high-pressure difference. Dynamic seal aspect employs our patent engineering and imported oil seals, the vibration amount of shaft on the shaft seals is controlled to less than 0.02mm. A gravity valve is set up among the suction and exhaust part of the pump. The perform of your gravity valve is as follows, once the stress distinction amongst the suction and exhaust part is above the weight on the valve, the valve opens automatically, which tends to make the strain variation constantly maintain in a fixed controllable value, the value will be the allowable highest strain variation to guarantee the pump operate normally and in order that in fact, the roots vacuum pump with overflow valve is a kind of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially larger speed at reasonably reduce inlet pressure and it is possessed overload self-protective function. Because it is a pump of dry clearance seal building, if a particular pumping speed rate 15 and an greatest vacuum must be obtained, it’s needed to provide a lower inlet strain for reducing the back movement, hence, a pump has to be backed in use, roots vacuum pump ought to be began soon right after its inlet stress reaches a permissible worth for economization. It’s allow to pick unique varieties of pump as the backing pump for factual specifications, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing significant amount of vapor, the liquid ring vacuum pump is definitely the excellent backing pump.