Operating Principle and Characteristics: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent velocity within 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. They are near to each other and also to the housing with no actual contacting, so lubrication is pointless inside the operating housing. The very carefully balanced operating elements and high precision bevel wheels ensue the pump be operated stably and constantly underneath the ailment of high-pressure distinction. Dynamic seal component utilizes our patent technology and imported oil seals, the vibration level of shaft over the shaft seals is managed to much less than 0.02mm. A gravity valve is installed in between the suction and exhaust a part of the pump. The function from the gravity valve is as follows, once the strain difference among the suction and exhaust part is in excess of the excess weight of your valve, the valve opens instantly, which tends to make the pressure distinction always keep within a fixed controllable value, the value will be the allowable highest stress big difference to guarantee the pump perform ordinarily and in order 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 substantially increased pace at rather reduce inlet pressure and it can be possessed overload self-protective perform. Since it is often a pump of dry clearance seal development, if a certain pumping velocity price 15 and an greatest vacuum must be obtained, it truly is needed to supply a reduce inlet stress for reducing the back flow, consequently, a pump have to be backed in use, roots vacuum pump must be started off quickly after its inlet pressure reaches a permissible value for economization. It is actually allow to pick distinctive types of pump because the backing pump for factual prerequisites, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing substantial amount of vapor, the liquid ring vacuum pump will be the great backing pump.