Working Principle and Functions:
The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a continuous velocity inside the pump housing for suction and exhaust of gas. Two rotors are supported by two bearings and synchronized by a gear, which assures these two rotors in particular relative positions. These are near to each other and also to the housing with no real contacting, so lubrication is pointless from the doing work housing. The cautiously balanced working parts and high precision bevel wheels ensue the pump be operated stably and continuously below the affliction of high-pressure big difference. Dynamic seal part use our patent technology and imported oil seals, the vibration quantity of shaft to the shaft seals is controlled to significantly less than 0.02mm.
A gravity valve is installed concerning the suction and exhaust part of the pump. The function on the gravity valve is as follows, when the strain variation concerning the suction and exhaust aspect is in excess of the bodyweight on the valve, the valve opens immediately, which makes the strain distinction generally continue to keep in the fixed controllable worth, the value could be the allowable highest stress difference to guarantee the pump get the job done usually and to ensure in truth, 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 increased velocity at comparatively decrease inlet stress and it truly is possessed overload self-protective perform. Since it is usually a pump of dry clearance seal building, if a specific pumping speed fee and an greatest vacuum should be obtained, it is necessary to provide a decrease inlet stress for lowering the back flow, thus, 
a pump need to be backed in use, roots vacuum pump should be started out soon soon after its inlet strain reaches a permissible worth for economization.
It’s allow to pick distinct types of pump because the backing pump for factual needs, such as oil seal pump and liquid ring vacuum pump. When pumping the gas containing big amount of vapor, the liquid ring vacuum pump will be the suitable backing pump.
