Operating Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed 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 specified relative positions. They can be near to one another and to the housing with out actual contacting, so lubrication is pointless while in the working housing. The carefully balanced working elements and higher precision bevel wheels ensue the pump be operated stably and constantly underneath the problem of high-pressure variation. Dynamic seal element employs our patent technology and imported oil seals, the vibration quantity of shaft around the shaft seals is controlled to less than 0.02mm. A gravity valve is set up among the suction and exhaust a part of the pump. The function with the gravity valve is as follows, once the strain variation in between the suction and exhaust component is above the bodyweight of your valve, the valve opens immediately, which can make the stress variation often hold in the fixed controllable value, the worth would be the allowable highest stress distinction to make certain the pump operate usually and so that actually, 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 greater pace at comparatively reduce inlet strain and it really is possessed overload self-protective perform. Since it can be a pump of dry clearance seal building, if a specific pumping pace price 15 and an greatest vacuum should be obtained, it truly is required to supply a lower inlet stress for cutting down the back flow, as a result, a pump must be backed in use, roots vacuum pump needs to be began soon immediately after its inlet stress reaches a permissible value for economization. It really is allow to pick different types of pump since the backing pump for factual requirements, such 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.