Working Principle and Features:
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 gas. Two rotors are supported by two bearings and synchronized by a gear, which guarantees these two rotors in specific relative positions. They can be close to to each other and also to the housing without actual contacting, so lubrication is pointless while in the doing work housing. The cautiously balanced operating elements and large precision bevel wheels ensue the pump be operated stably and continuously below the ailment of high-pressure difference. Dynamic seal aspect use our patent technologies and imported oil seals, the vibration quantity of shaft around the shaft seals is controlled to much less than 0.02mm.
A gravity valve is installed in between the suction and exhaust part of the pump. The perform from the gravity valve is as follows, when the stress distinction among the suction and exhaust component is above the weight of your valve, the valve opens instantly, which tends to make the pressure big difference often maintain within a fixed controllable worth, the value may be the allowable highest pressure difference to be sure the pump get the job done normally and in order that in actual fact, the roots vacuum pump with overflow valve can be a kind of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has substantially larger pace at comparatively lower inlet stress and it truly is possessed overload self-protective perform. Since it is usually a pump of dry clearance seal development, if a specific pumping speed price and an ultimate vacuum should be obtained, it is actually necessary to provide a lower inlet strain for reducing the back movement, thus, 
a pump should be backed in use, roots vacuum pump ought to be started quickly soon after its inlet stress reaches a permissible worth for economization.
It can be permit to select distinct kinds of pump because the backing pump for factual specifications, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing substantial level of vapor, the liquid ring vacuum pump is the excellent backing pump.
