Operating Principle and Functions: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant velocity inside 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 sure relative positions. They’re near to one another and to the housing with no actual contacting, so lubrication is needless inside the operating housing. The carefully balanced working components and high precision bevel wheels ensue the pump be operated stably and continuously beneath the problem of high-pressure distinction. Dynamic seal part employs our patent technologies and imported oil seals, the vibration volume of shaft on the shaft seals is controlled to significantly less than 0.02mm. A gravity valve is installed between the suction and exhaust part of the pump. The perform in the gravity valve is as follows, when the pressure big difference among the suction and exhaust aspect is more than the fat of your valve, the valve opens instantly, which makes the pressure distinction normally continue to keep in a fixed controllable value, the value could be the allowable highest pressure distinction to be sure the pump work normally and to ensure in reality, the roots vacuum pump with overflow valve can be a sort of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably larger pace at fairly reduce inlet strain and it’s possessed overload self-protective function. Since it can be a pump of dry clearance seal building, if a particular pumping velocity rate 15 and an ultimate vacuum should be obtained, it really is required to provide a reduce inlet stress for minimizing the back movement, as a result, a pump have to be backed in use, roots vacuum pump needs to be started quickly after its inlet pressure reaches a permissible worth for economization. It’s allow to select distinct varieties of pump because the backing pump for factual demands, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing substantial amount of vapor, the liquid ring vacuum pump would be the ideal backing pump.