Rotary vane vacuum pump start, run, stop three steps are very important, but the most important is the adjustment of the outlet valve. If the suction on the state, the outlet valve opening can be relatively large, if the inverted state, the outlet valve opening can be relatively small. The closer to the design point of the pump, the better the working point of the outlet valve adjusts, so that the actual flow state can be close to the theoretical design. The pump has high operation efficiency and saves resources. Because the pump efficiency points are in the design point or near the design point, of course, ultimately, the current is not overloaded as a prerequisite.
Because the rotary vane vacuum pump is turned on, there is no water in the outlet pipe of the pump, so there is no pipeline resistance and lifting height resistance. After the pump starts, the pump lift is very low and the flow rate is very big. At this time, the pump motor ( Shaft power) output is large (according to the pump performance curve), it is easy to overloading, it will make the pump motor and circuit damage, so we need to close the outlet valve on startup, in order to ensure the normal operation of the pump.
1, K-shaped power seal will not run out of water during normal operation.
2, a cooling water device, to check the water flow is normal.
Vacuum pump stop pump:
1, rotary vane vacuum pump should close the outlet valve to prevent the check valve failure resulting in water pressure pipe into the water pressure pump, causing the impeller reversal, resulting in pump damage.
2, stop the pump if the inertia is small, that is, after the power pump stopped quickly to explain the pump with a mocha or eccentric phenomenon.
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