Working Principle and Features: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous speed 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 selected relative positions. They’re close to to one another and also to the housing without real contacting, so lubrication is unnecessary within the working housing. The very carefully balanced operating elements and higher precision bevel wheels ensue the pump be operated stably and constantly beneath the issue of high-pressure variation. Dynamic seal part utilizes our patent technological innovation and imported oil seals, the vibration level of shaft to the shaft seals is controlled to less than 0.02mm. A gravity valve is put in involving the suction and exhaust part of the pump. The perform with the gravity valve is as follows, once the strain distinction amongst the suction and exhaust element is above the bodyweight of the valve, the valve opens automatically, which tends to make the strain difference usually preserve within a fixed controllable worth, the value is definitely the allowable highest pressure difference to be sure the pump perform typically and to ensure in reality, the roots vacuum pump with overflow valve can be a variety of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably greater pace at relatively lower inlet stress and it can be possessed overload self-protective function. Since it is usually a pump of dry clearance seal building, if a certain pumping pace fee 15 and an ultimate vacuum must be obtained, it really is important to provide a decrease inlet stress for cutting down the back movement, hence, a pump must be backed in use, roots vacuum pump needs to be started off quickly just after its inlet pressure reaches a permissible worth for economization. It really is allow to select diverse varieties of pump as the backing pump for factual specifications, such as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing massive level of vapor, the liquid ring vacuum pump would be the great backing pump.


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