Working Principle and Features:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent velocity inside 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 selected relative positions. These are close to to each other and also to the housing without having actual contacting, so lubrication is pointless in the functioning housing. The cautiously balanced working elements and substantial precision bevel wheels ensue the pump be operated stably and constantly under the issue of high-pressure difference. Dynamic seal aspect use our patent technological innovation and imported oil seals, the vibration level of shaft on the shaft seals is managed to much less than 0.02mm.
A gravity valve is put in between the suction and exhaust a part of the pump. The perform on the gravity valve is as follows, when the strain difference among the suction and exhaust portion is more than the bodyweight in the valve, the valve opens immediately, which makes the strain big difference constantly continue to keep in the fixed controllable value, the worth will be the allowable highest stress distinction to make certain the pump operate ordinarily and to ensure that actually, the roots vacuum pump with overflow valve is actually a variety of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably higher pace at somewhat lower inlet stress and it really is possessed overload self-protective function. As it is a pump of dry clearance seal construction, if a certain pumping speed fee and an greatest vacuum should be obtained, it really is needed to provide a decrease inlet pressure for reducing the back movement, as a result, a pump need to be backed in use, roots vacuum pump must be began 
quickly just after its inlet pressure reaches a permissible worth for economization.
It is actually permit to select unique kinds of pump since the backing pump for factual demands, such as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing massive amount of vapor, the liquid ring vacuum pump could be the ideal backing pump.
