Operating Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a constant pace inside the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which guarantees these two rotors in selected relative positions. These are close to to each other and to the housing with out real contacting, so lubrication is needless during the operating housing. The carefully balanced working elements and large precision bevel wheels ensue the pump be operated stably and constantly under the condition of high-pressure variation. Dynamic seal element utilizes our patent technologies and imported oil seals, the vibration quantity of shaft about the shaft seals is controlled to less than 0.02mm. A gravity valve is installed concerning the suction and exhaust part of the pump. The function in the gravity valve is as follows, when the stress distinction concerning the suction and exhaust component is in excess of the bodyweight on the valve, the valve opens immediately, which can make the stress distinction generally continue to keep within a fixed controllable worth, the value is the allowable highest stress variation to make sure the pump perform normally and to ensure that actually, the roots vacuum pump with overflow valve is really a variety of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably larger pace at somewhat reduced inlet pressure and it truly is possessed overload self-protective function. Because it is a pump of dry clearance seal construction, if a particular pumping pace rate 15 and an ultimate vacuum need to be obtained, it really is essential to provide a lower inlet stress for cutting down the back flow, consequently, a pump must be backed in use, roots vacuum pump must be started off quickly immediately after its inlet strain reaches a permissible worth for economization. It really is allow to select distinct sorts of pump since the backing pump for factual necessities, this kind of as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing large quantity of vapor, the liquid ring vacuum pump will be the suitable backing pump.


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