五, the measures to improve pump cavitation resistance

A, cause cavitation of centrifugal pump

1, high medium temperature to be delivered.

2, the pool of water level is too low, gas is inhaled.

3, the pump installation height is too high.

4, flow velocity and drag suction pipe is too big.

5, the suction pipe, flange (without liquid seal) seal is bad, there is air in.

6, too much traffic.

B, the measures

1, improve the cavitation performance of the pump itself.

(1) reduce the impeller inlet part of the flow velocity, reduce NPSH required.

(2) increasing the impeller head is bend radius of curvature, reduce the local resistance loss.

2, increase the effective NPSH of the suction system mechanism.

(1) reduce the flow of the suction line loss, appropriately increase the diameter of the suction pipe, and minimize the line of accessories, such as elbow, valve, etc.

(2) the reasonable geometric installation height and flow backward level.