Operating Principle and Characteristics:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous pace within the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in particular relative positions. They’re near to one another and to the housing without the need of real contacting, so lubrication is needless while in the working housing. The meticulously balanced operating parts and high precision bevel wheels ensue the pump be operated stably and continuously beneath the condition of high-pressure big difference. Dynamic seal component use our patent technologies and imported oil seals, the vibration amount of shaft within the shaft seals is controlled to less than 0.02mm.
A gravity valve is set up amongst the suction and exhaust part of the pump. The function of the gravity valve is as follows, once the pressure big difference concerning the suction and exhaust component is in excess of the weight of your valve, the valve opens instantly, which tends to make the pressure difference 
always preserve inside a fixed controllable worth, the value could be the allowable highest strain variation to guarantee the pump work typically and to ensure in truth, 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 larger velocity at fairly reduced inlet pressure and it is actually possessed overload self-protective perform. Because it can be a pump of dry clearance seal building, if a particular pumping pace price and an ultimate vacuum have to be obtained, it is actually necessary to supply a reduce inlet stress for lowering the back flow, hence, a pump must be backed in use, roots vacuum pump should be started off soon right after its inlet strain reaches a permissible value for economization.
It really is allow to pick various types of pump as the backing pump for factual requirements, 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 excellent backing pump.
