Working Principle and Capabilities:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a frequent pace within the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in certain relative positions. They are close to to one another and also to the housing with no actual contacting, so lubrication is needless during the operating housing. The thoroughly balanced operating parts and high precision bevel wheels ensue the pump be operated stably and constantly under the issue of high-pressure big difference. Dynamic seal part use our patent technologies and imported oil seals, the vibration level of shaft on the shaft seals is controlled to less than 0.02mm.
A gravity valve is set up concerning the suction and exhaust part of the pump. The perform of the gravity valve is as follows, once the stress difference among the suction and exhaust part is more than the excess weight in the valve, the valve opens immediately, which can make the pressure distinction often hold in a fixed controllable worth, the value would be the allowable highest pressure distinction to be sure the pump get the job done generally and so that in fact, the roots vacuum pump with overflow valve is a kind of overload self-protective pump.
Series SYF roots vacuum pump with overflow valve has substantially 
increased speed at fairly reduce inlet pressure and it is actually possessed overload self-protective function. Because it is a pump of dry clearance seal construction, if a particular pumping speed charge and an greatest vacuum need to be obtained, it is required to supply a lower inlet pressure for lowering the back flow, consequently, a pump needs to be backed in use, roots vacuum pump need to be started out quickly just after its inlet stress reaches a permissible worth for economization.
It really is allow to select distinct kinds of pump as 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 would be the great backing pump.
