Operating Principle and Capabilities: The series SYF roots vacuum pump is with overflow valve. The figure-of-eight rotors are counter-rotating at a consistent speed inside 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 sure relative positions. They’re near to each other and also to the housing without the need of actual contacting, so lubrication is pointless within the doing work housing. The carefully balanced operating elements and high precision bevel wheels ensue the pump be operated stably and continuously underneath the issue of high-pressure big difference. Dynamic seal portion makes use of our patent technological innovation and imported oil seals, the vibration level of shaft within the shaft seals is managed to less than 0.02mm. A gravity valve is set up in between the suction and exhaust a part of the pump. The perform with the gravity valve is as follows, once the pressure distinction in between the suction and exhaust aspect is above the bodyweight of the valve, the valve opens immediately, which helps make the strain difference constantly retain within a fixed controllable value, the worth will be the allowable highest pressure big difference to make sure the pump get the job done typically and in order that in fact, the roots vacuum pump with overflow valve can be a variety of overload self-protective pump. Series SYF roots vacuum pump with overflow valve has considerably increased velocity at comparatively decrease inlet pressure and it is possessed overload self-protective function. Because it can be a pump of dry clearance seal development, if a certain pumping speed rate 15 and an greatest vacuum must be obtained, it is necessary to provide a lower inlet pressure for lowering the back flow, hence, a pump must be backed in use, roots vacuum pump should be started soon soon after its inlet strain reaches a permissible worth for economization. It really is allow to pick distinctive kinds of pump as the backing pump for factual prerequisites, such as oil seal pump and liquid ring vacuum pump. When pumping the fuel containing massive amount of vapor, the liquid ring vacuum pump is definitely the suitable backing pump.