Working Principle and Attributes:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous speed 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 selected relative positions. These are near to one another and to the housing without real contacting, so lubrication is unnecessary while in the functioning housing. The meticulously balanced working parts and large precision bevel wheels ensue the pump be operated stably and continuously underneath the affliction of high-pressure big difference. Dynamic seal part use our patent technological innovation and imported oil seals, the vibration level of shaft over the shaft seals is controlled to significantly less than 0.02mm.
A gravity valve is put in amongst the suction and exhaust part of the pump. The perform from the gravity valve is as follows, when the strain distinction involving the suction and exhaust element is above the weight with the valve, the valve opens instantly, which helps make the strain variation often retain in a fixed controllable value, the value would be the allowable highest stress variation to make sure the pump function typically and in order that the truth is, the roots vacuum pump with overflow valve is a sort of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably higher pace at comparatively lower inlet strain and it is possessed overload self-protective function. As it is a pump of dry clearance seal development, if a specific pumping velocity price and an greatest vacuum must be obtained, it is actually necessary to supply a decrease inlet stress for minimizing the back movement, consequently, a pump needs to be backed in use, roots vacuum pump need to be began quickly just after its inlet pressure reaches a permissible value for economization.
It can be permit to 
pick diverse kinds of pump because the backing pump for factual demands, such as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing large volume of vapor, the liquid ring vacuum pump could be the perfect backing pump.
