Working Principle and Features: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a frequent pace within the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which guarantees these two rotors in specific relative positions. They can be close to to each other and to the housing without having real contacting, so lubrication is needless while in the working housing. The very carefully balanced working parts and large precision bevel wheels ensue the pump be operated stably and constantly below the ailment of high-pressure difference. Dynamic seal part uses our patent technology and imported oil seals, the vibration volume of shaft to the shaft seals is managed to much less than 0.02mm. A gravity valve is put in involving the suction and exhaust part of the pump. The function of the gravity valve is as follows, once the stress variation amongst the suction and exhaust component is in excess of the weight in the valve, the valve opens instantly, which makes the pressure big difference normally keep in the fixed controllable worth, the value would be the allowable highest stress difference to be sure the pump work ordinarily and to ensure in reality, the roots vacuum pump with overflow valve is usually a kind of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially greater speed at somewhat lower inlet stress and it really is possessed overload self-protective function. Since it is usually a pump of dry clearance seal construction, if a particular pumping pace charge 15 and an ultimate vacuum should be obtained, it truly is required to supply a reduced inlet strain for cutting down the back movement, consequently, a pump has to be backed in use, roots vacuum pump needs to be started out soon just after its inlet pressure reaches a permissible value for economization. It can be permit to select distinct sorts of pump because the backing pump for factual specifications, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing significant level of vapor, the liquid ring vacuum pump will be the perfect backing pump.


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