Operating Principle and Functions:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant velocity within the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in 
selected relative positions. They are close to to each other and also to the housing without having actual contacting, so lubrication is needless in the operating housing. The thoroughly balanced operating elements and higher precision bevel wheels ensue the pump be operated stably and constantly under the issue of high-pressure variation. Dynamic seal portion use our patent technology and imported oil seals, the vibration volume of shaft around the shaft seals is managed to less than 0.02mm.
A gravity valve is installed between the suction and exhaust part of the pump. The perform of your gravity valve is as follows, when the pressure distinction involving the suction and exhaust portion is more than the excess weight of your valve, the valve opens automatically, which tends to make the stress distinction normally continue to keep in the fixed controllable worth, the worth could be the allowable highest strain variation to make sure the pump get the job done commonly and so 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 substantially increased pace at comparatively lower inlet strain and it’s possessed overload self-protective function. As it is a pump of dry clearance seal construction, if a specific pumping velocity charge and an greatest vacuum need to be obtained, it really is needed to supply a reduced inlet pressure for minimizing the back movement, consequently, a pump needs to be backed in use, roots vacuum pump need to be started off soon after its inlet stress reaches a permissible value for economization.
It really is allow to select unique kinds of pump as the backing pump for factual needs, such as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing large level of vapor, the liquid ring vacuum pump will be the excellent backing pump.
