Operating Principle and Options:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent pace within the pump housing for suction and exhaust of gasoline. Two rotors are supported by two bearings and synchronized by a gear, which guarantees these two rotors in specified relative positions. They’re near to one another and also to the housing without actual contacting, so lubrication is pointless while in the functioning housing. The cautiously balanced working parts and high precision bevel wheels ensue the pump be operated stably and constantly below the problem of high-pressure variation. Dynamic seal component use our patent technologies and imported oil seals, the vibration level of shaft over the shaft seals is controlled to much less than 0.02mm.
A gravity valve is set up between the suction and exhaust a part of the pump. The function of the gravity valve is as follows, once the pressure big difference in between the suction and exhaust component is in excess of the excess weight on the valve, the valve opens immediately, which can make the strain difference constantly keep in the fixed controllable worth, the value may be the allowable highest stress difference to guarantee the pump work typically and to ensure that in actual fact, the roots vacuum pump with overflow valve is usually a variety of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably higher speed at relatively reduced inlet strain and it is actually possessed overload self-protective perform. As it is actually a pump of dry clearance seal building, if a particular pumping speed price and an ultimate vacuum should be obtained, it can be important to provide a lower inlet stress for decreasing the back flow, thus, a pump need to be backed in use, roots vacuum pump should be started off quickly after its inlet strain reaches a permissible worth for economization.
It is actually permit to select distinctive kinds of pump as the backing pump for factual prerequisites, such as 
oil seal pump and liquid ring vacuum pump. When pumping the fuel containing big level of vapor, the liquid ring vacuum pump is the excellent backing pump.
