Working Principle and Characteristics:
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 particular relative positions. They can be close to to each other and also to the housing without real contacting, so lubrication is unnecessary from the working housing. The meticulously balanced working parts and higher precision bevel wheels ensue the pump be operated stably and continuously underneath the affliction of high-pressure big difference. Dynamic seal portion use our patent technological innovation and imported oil seals, the vibration quantity of shaft within the shaft seals is managed to less than 0.02mm.
A gravity valve is set up in between the suction and exhaust a part of the pump. The perform with the gravity valve is as follows, once the pressure big difference in between the suction and exhaust aspect is in excess of the bodyweight of the valve, the valve opens instantly, which helps make the strain difference generally retain within a fixed controllable value, the worth will be the allowable highest stress big difference to make sure the pump get the job done typically and in order that in fact, the roots vacuum pump with overflow valve is often a variety of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably increased velocity at comparatively decrease inlet pressure and it really is possessed overload self-protective function. Since it can be a pump of dry clearance seal 
development, if a certain pumping speed price and an greatest vacuum must be obtained, it is required to provide a lower inlet stress for lowering the back flow, hence, a pump must be backed in use, roots vacuum pump should be started soon immediately after its inlet strain reaches a permissible worth for economization.
It really is allow to pick distinctive kinds of pump as the backing pump for factual prerequisites, such as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing massive amount of vapor, the liquid ring vacuum pump is definitely the suitable backing pump.
