Working Principle and Capabilities: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent velocity 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 can be close to to each other and also to the housing devoid of real contacting, so lubrication is unnecessary from the operating housing. The cautiously balanced working elements and high precision bevel wheels ensue the pump be operated stably and constantly beneath the ailment of high-pressure difference. Dynamic seal aspect employs our patent engineering and imported oil seals, the vibration level of shaft on the shaft seals is controlled to much less than 0.02mm. A gravity valve is installed among the suction and exhaust part of the pump. The perform of your gravity valve is as follows, when the strain variation involving the suction and exhaust part is in excess of the excess weight of the valve, the valve opens automatically, which tends to make the stress big difference normally continue to keep inside a fixed controllable value, the worth is definitely the allowable highest stress difference to make certain the pump work usually and in order that in truth, the roots vacuum pump with overflow valve can be a kind of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has substantially higher speed at relatively decrease inlet strain and it is actually possessed overload self-protective function. As it is often a pump of dry clearance seal construction, if a certain pumping speed fee 15 and an ultimate vacuum need to be obtained, it truly is essential to supply a decrease inlet stress for reducing the back flow, consequently, a pump has to be backed in use, roots vacuum pump should be started quickly soon after its inlet pressure reaches a permissible worth for economization. It is actually permit to pick different varieties of pump since the backing pump for factual needs, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing significant quantity of vapor, the liquid ring vacuum pump will be the great backing pump.