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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 velocity within the pump housing for suction and exhaust of gasoline. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in specified relative positions. These are close to to each other and to the housing without having actual contacting, so lubrication is pointless while in the doing work housing. The carefully balanced operating elements and high precision bevel wheels ensue the pump be operated stably and continuously below the problem of high-pressure distinction. Dynamic seal component employs our patent technology and imported oil seals, the vibration volume of shaft about the shaft seals is controlled to much less than 0.02mm. A gravity valve is put in in between the suction and exhaust part of the pump. The perform on the gravity valve is as follows, when the stress variation between the suction and exhaust element is above the fat in the valve, the valve opens instantly, which tends to make the strain distinction generally maintain inside a fixed controllable value, the worth may be the allowable highest strain big difference to be sure the pump do the job commonly and to ensure actually, 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 increased pace at fairly decrease inlet strain and it truly is possessed overload self-protective perform. Because it is really a pump of dry clearance seal development, if a particular pumping pace charge 15 and an ultimate vacuum must be obtained, it’s required to provide a decrease inlet stress for decreasing the back movement, as a result, a pump have to be backed in use, roots vacuum pump needs to be begun soon after its inlet strain reaches a permissible worth for economization. It really is allow to pick distinct types of pump since the backing pump for factual demands, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing big volume of vapor, the liquid ring vacuum pump is the perfect backing pump.