Working Principle and Characteristics:
The series SYF roots vacuum pump is 
with overflow valve. The figure-of-eight rotors are counter-rotating at a continual velocity within the pump housing for suction and exhaust of gasoline. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in sure relative positions. They can be close to to one another and to the housing with no actual contacting, so lubrication is unnecessary while in the working housing. The very carefully balanced operating components and substantial precision bevel wheels ensue the pump be operated stably and constantly beneath the problem of high-pressure variation. Dynamic seal portion use our patent technology and imported oil seals, the vibration level of shaft on the shaft seals is controlled to less than 0.02mm.
A gravity valve is installed among the suction and exhaust a part of the pump. The function of the gravity valve is as follows, when the stress distinction concerning the suction and exhaust component is above the weight in the valve, the valve opens automatically, which makes the strain variation normally retain in the fixed controllable worth, the value would be the allowable highest pressure distinction to make certain the pump get the job done commonly and to ensure in truth, the roots vacuum pump with overflow valve is really a sort of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has substantially higher velocity at somewhat lower inlet strain and it can be possessed overload self-protective function. Because it can be a pump of dry clearance seal development, if a particular pumping pace fee and an ultimate vacuum have to be obtained, it is actually required to provide a reduced inlet stress for reducing the back movement, hence, a pump need to be backed in use, roots vacuum pump should be started soon just after its inlet stress reaches a permissible value for economization.
It is permit to pick distinctive sorts of pump as the backing pump for factual needs, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing big quantity of vapor, the liquid ring vacuum pump is definitely the perfect backing pump.