Why a centrifugal pump has low flow..? Some Causes effects in Centrifugal Pump 23-Jul-16 Globe Star Engineers (India)Pvt. Ltd. All types of mechanical seal, Rotary Joints and Industrial Pump.

WHY CENTRIFUGAL PUMP HAS LOW FLOW …?

In the Industrial Industry, Centrifugal pump

So there are the most 8 reasons to solve this problem.

is most useful pump of the most of industry line. After using so much time of centrifugal pump, their media flow has been low in some reason,

1. Reversed Impeller Rotation: This may seem like a no-brainier, but it really is a common problem. When wiring the pump’s motor to power, it’s important to test which way the motor is turning first. “Bump Starting” the motor is a common practice where the motor is started without the pump hooked up to ensure proper rotation of the shaft. If the motor turns the wrong way, the impeller could potentially back off the shaft, causing serious damage to the internals.

2. Clogged Suction:

3. 3.

Make sure the suction pipe is free and clear of debris. Less flow into the pump will obviously yield less flow out of the pump.

Worn impeller, wear ring, wear plate:

4.

If the vanes on the impeller are worn, the hydraulic capacity of the pump is reduced. Same with the wear ring and wear plate. When clearances open up due to wear, more re-circulation occurs inside the pump, reducing the pump’s flow. Excessive Clearances:

5.

If clearances are too wide for the type of fluid pumped, excessive slip will occur. Fluid will continue to recirculate inside the pump, yielding lower flow out of the pump. Debris in the impeller:

6.

If the eye of the impeller is plugged with debris, it removes the hydraulic capacity of the impeller to create an area of low pressure. Closed Discharge or Suction Valve:

7.

Again, this one seems really simple, but something that can be easily overlooked. Open Bypass Valve:

8.

Check to make sure the flow isn’t being diverted somewhere else through a bypass valve. Vortexing:

This is more common with pumps in suction lift conditions, like a self-priming pump, or a vertical turbine. Make sure you’re meeting minimum submergence requirements to prevent vortex.