Operating Principle and Functions:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent speed 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 certain relative positions. They’re near to one another and also to the housing with out actual contacting, so lubrication is pointless within the functioning housing. The meticulously balanced working elements and high precision bevel wheels ensue the pump be operated stably and continuously beneath the issue of high-pressure variation. Dynamic seal component use our patent technological innovation and imported oil seals, the vibration quantity of shaft to the shaft seals is controlled to much less than 0.02mm.
A gravity valve is put in concerning the suction and exhaust a part of the pump. The function from the gravity valve is as follows, when the pressure distinction between the suction and exhaust aspect is over the bodyweight from the valve, the valve opens instantly, which makes the pressure distinction usually hold in a fixed controllable worth, the worth may be the allowable highest pressure big difference to make certain the pump function generally and in order that in reality, the roots vacuum pump with overflow 
valve is actually a kind of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has considerably greater velocity at relatively reduce inlet strain and it’s possessed overload self-protective function. Because it can be a pump of dry clearance seal building, if a particular pumping speed charge and an greatest vacuum should be obtained, it really is important to provide a decrease inlet pressure for reducing the back flow, hence, a pump needs to be backed in use, roots vacuum pump should be began soon immediately after its inlet pressure reaches a permissible value for economization.
It can be permit to select distinctive sorts of pump because the backing pump for factual demands, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing huge quantity of vapor, the liquid ring vacuum pump may be the suitable backing pump.
