Operating Principle and Options:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous speed 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 particular relative positions. They are really close to to one another and to the housing with no actual contacting, so lubrication is unnecessary while in the functioning housing. The very carefully balanced operating parts and substantial precision bevel wheels ensue the pump be operated stably and continuously underneath the condition of high-pressure distinction. Dynamic seal aspect use our patent technologies and imported oil seals, the vibration amount of shaft on the shaft seals is managed to much less than 0.02mm.
A gravity valve is set up in between the suction and exhaust a part of the pump. The perform of your gravity valve is as follows, when the strain variation concerning the suction and exhaust part is over the excess weight of your valve, the valve opens instantly, which makes the pressure difference generally keep inside a fixed controllable worth, the value is the allowable highest strain distinction to be sure the pump operate generally and in order that in reality, the roots vacuum pump with overflow 
valve is really a sort of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has substantially greater speed at reasonably reduced inlet strain and it truly is possessed overload self-protective function. Because it is a pump of dry clearance seal development, if a particular pumping pace fee and an ultimate vacuum must be obtained, it is actually necessary to supply a reduced inlet stress for decreasing the back movement, therefore, a pump must be backed in use, roots vacuum pump really should be began quickly right after its inlet stress reaches a permissible worth for economization.
It really is allow to pick distinctive varieties of pump as the backing pump for factual necessities, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing significant amount of vapor, the liquid ring vacuum pump would be the great backing pump.
