Operating Principle and Capabilities: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent speed 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 specified relative positions. They’re close to to each other and to the housing without the need of actual contacting, so lubrication is unnecessary inside the working housing. The very carefully balanced operating components and large precision bevel wheels ensue the pump be operated stably and continuously beneath the condition of high-pressure distinction. Dynamic seal element utilizes our patent engineering and imported oil seals, the vibration amount of shaft on the shaft seals is managed to much less than 0.02mm. A gravity valve is installed among the suction and exhaust a part of the pump. The perform with the gravity valve is as follows, when the pressure difference in between the suction and exhaust component is over the weight from the valve, the valve opens immediately, which makes the pressure distinction usually maintain in a fixed controllable worth, the value could be the allowable highest strain distinction to ensure the pump operate usually and so that in reality, the roots vacuum pump with overflow valve can be a type of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially higher speed at reasonably reduced inlet strain and it truly is possessed overload self-protective perform. Since it is usually a pump of dry clearance seal construction, if a particular pumping speed rate 15 and an ultimate vacuum have to be obtained, it really is important to provide a decrease inlet strain for minimizing the back flow, as a result, a pump has to be backed in use, roots vacuum pump really should be started off quickly right after its inlet pressure reaches a permissible worth for economization. It is actually allow to pick different kinds of pump as the backing pump for factual demands, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing massive level of vapor, the liquid ring vacuum pump will be the perfect backing pump.