Working Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a frequent velocity inside 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’re close to to each other and to the housing without having actual contacting, so lubrication is unnecessary from the doing work housing. The carefully balanced working parts and large precision bevel wheels ensue the pump be operated stably and continuously below the issue of high-pressure distinction. Dynamic seal component utilizes our patent engineering and imported oil seals, the vibration level of shaft over the shaft seals is managed to significantly less than 0.02mm. A gravity valve is put in concerning the suction and exhaust part of the pump. The function in the gravity valve is as follows, once the strain difference amongst the suction and exhaust component is in excess of the weight with the valve, the valve opens instantly, which makes the stress difference generally hold within a fixed controllable worth, the worth may be the allowable highest pressure distinction to ensure the pump operate usually and in order that the truth is, the roots vacuum pump with overflow valve is often a sort of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially larger speed at rather decrease inlet stress and it is actually possessed overload self-protective perform. Since it is usually a pump of dry clearance seal construction, if a specific pumping velocity price 15 and an ultimate vacuum must be obtained, it’s required to provide a reduce inlet stress for decreasing the back flow, hence, a pump need to be backed in use, roots vacuum pump really should be commenced quickly just after its inlet pressure reaches a permissible worth for economization. It’s permit to select distinct types of pump since the backing pump for factual specifications, such as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing massive level of vapor, the liquid ring vacuum pump is the best backing pump.