Operating Principle and Options:
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 ensures these two rotors in specified relative positions. They are really close to to one another and to the housing without having real contacting, so lubrication is pointless within the working housing. The cautiously balanced working elements and higher precision bevel wheels ensue the pump be operated stably and continuously below the affliction of high-pressure big difference. Dynamic seal component use our patent technologies and imported oil seals, the vibration volume of shaft around the shaft seals is controlled to much less than 0.02mm.
A gravity valve is set up concerning the suction and exhaust part of the pump. The function of the gravity valve is as follows, when the 
strain variation concerning the suction and exhaust element is in excess of the fat of the valve, the valve opens automatically, which makes the pressure big difference generally retain inside a fixed controllable value, the value may be the allowable highest pressure difference to make sure the pump function ordinarily and so that in truth, the roots vacuum pump with overflow valve is often a type of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has substantially larger speed at reasonably lower inlet stress and it is actually possessed overload self-protective function. As it is really a pump of dry clearance seal construction, if a particular pumping speed charge and an ultimate vacuum have to be obtained, it truly is required to provide a lower inlet pressure for lowering the back flow, thus, a pump must be backed in use, roots vacuum pump should be commenced quickly following its inlet stress reaches a permissible worth for economization.
It is actually allow to select various kinds of pump as the backing pump for factual specifications, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing big level of vapor, the liquid ring vacuum pump is the ideal backing pump.
