When

  • Issue with the check valve that could not be solved by cleaning (for example, persistent leakage)

  • Damage of inlet check valve

Parts required

Inlet check valve

Tools and additional items required

  • Solvent suitable for purging to flush out harmful substances

  • Solvent suitable for your application

Parts affected on the pump head

123
Figure: Inlet check valve on pump head

No.

Description

1

Solvent line

2

Inlet check valve

3

Pump head

Preparations

  1. To flush out harmful substances, purge the pump with an appropriate solvent.

Follow these steps

  1. On the inlet check valve, disconnect the solvent line.

  2. Loosen and remove the inlet check valve with your fingers.

  3. Tighten the new inlet check valve with your fingers.

  4. On the inlet check valve, connect the solvent line.

  5. Purge the pump using the solvent of your application.

  6. Inspect the check valve and connections for indications of leakage. Tighten leaky connections only when the system pressure is down to zero.

  7. Test the pump for leakage. Run the script: E04 - Detailed Leak test (Pump).