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A photo of a CPC Sanitary Centrifugal

CPC Sanitary Centrifugal Pump Troubleshooting

Edward Shaw
written by:

Edward Shaw

Technical Manager

27/02/2020

Having trouble with your CPC Sanitary Centrifugal Pump? Our comprehensive guide will help you get up and running in no time.

CPC Pump

The CPC Sanitary Centrifugal Pump is manufactured by Pomac Pumps and has been designed to EHEDG guidelines making it ideal for hygienic applications. If you’ve been having problems with your CPC Pump, try our troubleshooting guide below or if it continues, contact the team at Tapflo UK for help.

Malfunctions

What are the main causes of malfunction of the CPC Sanitary Centrifugal Pump?

A malfunction in a pump system may be caused by a number of reasons and is not necessarily the pump itself. Issues with the pipework or other fluid accessories within the system can be contributing factors. Another major contributing factor would be operating the pump in conditions that are extremely different from the ones provided at the time of specification.

Consequently, it is always recommended to check the following first:

  • Has the pump been installed correctly?
  • Are the operating conditions still according to the initial specification?
  • Are the other fluid accessories within the pipework functioning correctly?

In general, the following malfunctions can be identified:

  1. Pump provides little or no flow
  2. Pump does not reach duty point
  3. Pump provides irregular flow
  4. Pump leaks
  5. Pump vibrates excessively
  6. Pump makes too much noise
  7. Motor overheats
  8. Motor / Pump cuts out on thermal overload
  9. Pump has seized

Below is a table of the possible causes and solutions of these malfunctions.

Malfunction Cause Solution
1 2 3 4 5 6 7 8 9
  X       X X     Electrical Connection is defective Have a qualified electrician check the connections
  X               Wrong Direction or Rotation Have a qualified electrician reverse the direction of rotation of the electric motor
X                 The pump is not completely filled with liquid Fill the pump casing entirely with fluid and fit a non-return valve to the suction side
X X X     X       Insufficient Suction Pressure Increase the suction pressure or lower position of the pump further below the fluid level
  X           X   Pump operating at the wrong speed Check the motor speed
                X Contamination or objects are lodged within the pump which is larger than the solids handling capacity Clean the pump and install a suction filter if necessary
X X X             Air in the pipework Inspect the pipework and avoid upward rising bends in the pipework
  X               Valve in the suction pipework is not completely open Entirely open the valve
  X               The pump has been selected with too low a delivery pressure Install a larger pump or install a booster pump
X X X           X Suction pipe or filter is blocked Clean the suction pipe or filter
      X           Shaft Seal is defective Replace the Seal
      X           O-Ring is defective Replace the O-Ring
              X   Liquid Temperature is too high Decrease the liquid temperature
X             X X Impeller is jammed Unclog the impeller and replace if necessary
        X X   X X Impeller is damaged Replace the impeller
        X X X X X Motor Shaft is bent Replace the motor
        X X X X X Extension shaft is loose Inspect the extension shaft, reassemble and readjust
        X X X X X Bearings are damaged or worn Replace the motor, for IG(H) replace the bearings.
              X X Motor is overloaded Check the viscosity of the fluid.

Switch off the motor and check if the pump does not drag, if so, disassemble and repair.

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