Operating Principle and Characteristics: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a frequent pace 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 particular relative positions. They are really close to to each other and also to the housing with no actual contacting, so lubrication is pointless during the doing work housing. The carefully balanced operating components and substantial precision bevel wheels ensue the pump be operated stably and continuously under the condition of high-pressure distinction. Dynamic seal portion employs our patent technologies and imported oil seals, the vibration amount of shaft within the shaft seals is managed to significantly less than 0.02mm. A gravity valve is installed in between the suction and exhaust a part of the pump. The function in the gravity valve is as follows, once the stress variation between the suction and exhaust part is over the weight with the valve, the valve opens instantly, which can make the stress variation generally keep in a fixed controllable value, the value would be the allowable highest strain big difference to make sure the pump work normally and to ensure that in fact, the roots vacuum pump with overflow valve is a type of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially increased speed at somewhat reduced inlet pressure and it really is possessed overload self-protective perform. Because it can be a pump of dry clearance seal construction, if a particular pumping velocity price 15 and an greatest vacuum need to be obtained, it is required to supply a reduced inlet pressure for lowering the back movement, as a result, a pump need to be backed in use, roots vacuum pump should be began soon right after its inlet strain reaches a permissible value for economization. It is allow to pick various sorts of pump since the backing pump for factual prerequisites, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing big amount of vapor, the liquid ring vacuum pump will be the perfect backing pump.


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