Working Principle and Attributes: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent speed within the pump housing for suction and exhaust of fuel. Two rotors are supported by two bearings and synchronized by a gear, which ensures these two rotors in specific relative positions. These are near to each other and to the housing with no actual contacting, so lubrication is needless in the functioning housing. The carefully balanced operating parts and high precision bevel wheels ensue the pump be operated stably and constantly underneath the ailment of high-pressure variation. Dynamic seal aspect utilizes our patent engineering and imported oil seals, the vibration level of shaft around the shaft seals is controlled to much less than 0.02mm. A gravity valve is put in concerning the suction and exhaust a part of the pump. The perform from the gravity valve is as follows, once the stress difference involving the suction and exhaust portion is over the bodyweight with the valve, the valve opens automatically, which makes the strain variation often preserve in the fixed controllable value, the value is definitely the allowable highest pressure variation to make sure the pump get the job done usually and in order that in actual fact, the roots vacuum pump with overflow valve is often a kind of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably greater velocity at relatively reduce inlet pressure and it really is possessed overload self-protective perform. Because it is really a pump of dry clearance seal construction, if a particular pumping velocity charge 15 and an ultimate vacuum have to be obtained, it is actually necessary to supply a reduced inlet stress for reducing the back movement, hence, a pump needs to be backed in use, roots vacuum pump need to be started off quickly just after its inlet pressure reaches a permissible worth for economization. It can be permit to pick distinctive varieties of pump as the backing pump for factual prerequisites, such as oil seal pump and liquid ring vacuum pump. When pumping the gasoline containing large volume of vapor, the liquid ring vacuum pump will be the ideal backing pump.


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