Operating Principle and Options: 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 gas. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in specified relative positions. They are near to one another and also to the housing without the need of actual contacting, so lubrication is needless during the functioning housing. The carefully balanced operating components and high precision bevel wheels ensue the pump be operated stably and continuously below the problem of high-pressure big difference. Dynamic seal aspect employs our patent technologies and imported oil seals, the vibration quantity of shaft about the shaft seals is controlled to significantly less than 0.02mm. A gravity valve is installed amongst the suction and exhaust part of the pump. The function with the gravity valve is as follows, once the stress difference between the suction and exhaust part is over the weight of your valve, the valve opens instantly, which can make the stress difference generally keep in a fixed controllable value, the value would be the allowable highest pressure big difference to make sure the pump function normally and to ensure that actually, the roots vacuum pump with overflow valve is a type of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably higher speed at rather reduced inlet pressure and it truly is possessed overload self-protective perform. Because it is often a pump of dry clearance seal construction, if a specific pumping velocity price 15 and an ultimate vacuum need to be obtained, it is required to supply a decrease inlet pressure for minimizing the back movement, thus, a pump needs to be backed in use, roots vacuum pump should be began quickly immediately after its inlet strain reaches a permissible value for economization. It is actually allow to pick various types of pump since the backing pump for factual prerequisites, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the gas containing huge quantity of vapor, the liquid ring vacuum pump may be the excellent backing pump.