Working Principle and Capabilities: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent speed within the pump housing for suction and exhaust of gasoline. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in particular relative positions. They are near to one another and also to the housing without the need of actual contacting, so lubrication is unnecessary within the functioning housing. The meticulously balanced operating parts and substantial precision bevel wheels ensue the pump be operated stably and continuously below the issue of high-pressure distinction. Dynamic seal aspect uses our patent technology and imported oil seals, the vibration amount of shaft on the shaft seals is managed to significantly less than 0.02mm. A gravity valve is put in among the suction and exhaust a part of the pump. The perform of the gravity valve is as follows, when the pressure variation among the suction and exhaust portion is above the excess weight of your valve, the valve opens instantly, which tends to make the strain difference usually maintain in the fixed controllable value, the worth would be the allowable highest pressure distinction to make certain the pump work typically and so that the truth is, the roots vacuum pump with overflow valve is usually a type of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably higher speed at comparatively lower inlet stress and it is possessed overload self-protective function. Since it is actually a pump of dry clearance seal building, if a specific pumping speed price 15 and an ultimate vacuum must be obtained, it is important to provide a reduced inlet pressure for decreasing the back movement, thus, a pump have to be backed in use, roots vacuum pump ought to be started soon after its inlet pressure reaches a permissible worth for economization. It is permit to pick different kinds of pump as the backing pump for factual requirements, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing massive amount of vapor, the liquid ring vacuum pump would be the excellent backing pump.