Operating Principle and Options:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant speed inside the pump housing for suction and exhaust of gasoline. 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 devoid of actual contacting, so lubrication is pointless during the working housing. The very carefully balanced working components and high precision bevel wheels ensue the pump be operated stably and constantly underneath the ailment of high-pressure variation. Dynamic seal portion use our patent technological innovation and imported oil seals, the vibration volume of shaft around the shaft seals is managed to significantly less than 0.02mm.
A gravity valve is installed concerning the suction and exhaust a part of the pump. The perform from the gravity valve is as follows, once the stress distinction between the suction and exhaust aspect is over the weight of your valve, the valve opens automatically, which tends to make the strain variation generally retain inside a fixed controllable value, the worth will be the allowable highest stress difference to be sure the pump work usually and so that in actual fact, the roots vacuum pump with overflow valve is usually a kind of overload self-protective 
pump.
Series SYF roots vacuum pump with overflow valve has substantially larger speed at comparatively reduced inlet stress and it can be possessed overload self-protective function. Because it is actually a pump of dry clearance seal building, if a specific pumping speed fee and an ultimate vacuum must be obtained, it’s required to provide a decrease inlet strain for decreasing the back flow, consequently, a pump should be backed in use, roots vacuum pump ought to be started quickly after its inlet stress reaches a permissible value for economization.
It is actually permit to select various kinds of pump because the backing pump for factual requirements, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing huge amount of vapor, the liquid ring vacuum pump would be the best backing pump.
