Working Principle and Characteristics:
The 
series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continual velocity inside 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 specific relative positions. They may be close to to one another and to the housing devoid of real contacting, so lubrication is pointless while in the working housing. The carefully balanced working elements and high precision bevel wheels ensue the pump be operated stably and constantly underneath the issue of high-pressure difference. Dynamic seal component use our patent technological innovation and imported oil seals, the vibration quantity of shaft about the shaft seals is controlled to significantly less than 0.02mm.
A gravity valve is set up concerning the suction and exhaust a part of the pump. The perform of your gravity valve is as follows, once the pressure distinction involving the suction and exhaust aspect is in excess of the weight on the valve, the valve opens immediately, which can make the pressure big difference generally keep inside a fixed controllable value, the worth would be the allowable highest stress big difference to be sure the pump perform generally and in order that in actual fact, the roots vacuum pump with overflow valve is actually a sort of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably larger pace at comparatively decrease inlet stress and it is possessed overload self-protective function. As it can be a pump of dry clearance seal development, if a specific pumping pace fee and an ultimate vacuum must be obtained, it can be required to supply a decrease inlet pressure for decreasing the back movement, consequently, a pump needs to be backed in use, roots vacuum pump needs to be started off quickly immediately after its inlet stress reaches a permissible worth for economization.
It is actually allow to select distinctive kinds of pump as the backing pump for factual specifications, such as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing substantial amount of vapor, the liquid ring vacuum pump will be the best backing pump.
