Operating Principle and Capabilities:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continual speed inside the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in specific relative positions. They can be near to one another and also to the housing without the need of real contacting, so lubrication is needless from the functioning housing. The meticulously balanced operating elements and large precision bevel wheels ensue the pump be operated stably and constantly underneath the ailment of high-pressure variation. Dynamic seal component use our patent technological innovation and imported oil seals, the vibration quantity of shaft on the shaft seals is controlled to significantly less than 
0.02mm.
A gravity valve is installed between the suction and exhaust a part of the pump. The function from the gravity valve is as follows, once the strain big difference among the suction and exhaust aspect is more than the bodyweight of your valve, the valve opens immediately, which can make the stress big difference usually continue to keep in the fixed controllable worth, the value is the allowable highest stress variation to make certain the pump operate typically and in order that in truth, the roots vacuum pump with overflow valve is a sort of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably larger velocity at somewhat reduce inlet stress and it is possessed overload self-protective function. As it can be a pump of dry clearance seal building, if a certain pumping speed rate and an ultimate vacuum have to be obtained, it is important to supply a reduced inlet strain for cutting down the back flow, consequently, a pump should be backed in use, roots vacuum pump should be commenced quickly immediately after its inlet stress reaches a permissible value for economization.
It is allow to select different sorts of pump because the backing pump for factual requirements, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing substantial quantity of vapor, the liquid ring vacuum pump could be the great backing pump.
