Operating Principle and Characteristics: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed inside the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which guarantees these two rotors in selected relative positions. These are near to each other and to the housing without the need of actual contacting, so lubrication is pointless in the operating housing. The carefully balanced working components and substantial precision bevel wheels ensue the pump be operated stably and continuously underneath the issue of high-pressure big difference. Dynamic seal portion uses our patent technologies and imported oil seals, the vibration volume of shaft about the shaft seals is managed to less than 0.02mm. A gravity valve is installed involving the suction and exhaust a part of the pump. The function with the gravity valve is as follows, once the strain variation among the suction and exhaust element is above the bodyweight on the valve, the valve opens automatically, which makes the stress variation usually maintain inside a fixed controllable worth, the worth may be the allowable highest strain difference to ensure the pump get the job done typically and to ensure that in actual fact, the roots vacuum pump with overflow valve is actually a sort of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably larger pace at reasonably lower inlet pressure and it truly is possessed overload self-protective perform. Because it can be a pump of dry clearance seal development, if a particular pumping speed price 15 and an greatest vacuum have to be obtained, it truly is required to provide a reduced inlet strain for minimizing the back movement, hence, a pump needs to be backed in use, roots vacuum pump should be started out quickly just after its inlet strain reaches a permissible value for economization. It truly is permit to select different types of pump since the backing pump for factual requirements, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing substantial level of vapor, the liquid ring vacuum pump would be the excellent backing pump.



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