KNF Diaphragm Laboratory Pump NF100KT.18S

Check tightening torque of head screws regularly

Check that pump and system are leak-tight

Cleaning / replacing valve plates and pump diaphragm

Ensure all necessary tools are available

Verify maximum tightening torque

Replace pump diaphragm if the pumping capacity decreases or a leak occurs

Replace pump diaphragm in the event of repeated head installation

Operate the pump in a collecting pan

Flush pump thoroughly after use or if it is not to be used for an extended period

Check the discharge outlet regularly for leaks

Observe the service life of the diaphragm and other elastomer parts

Diaphragm Replacement Procedure

9.5 Checking that pump is leak-tight

Ensure parts in contact with fluid are designed for operating pressure

Set up the system as shown in Fig. 27

Use distilled water as a test medium

Set pressure control valve to working pressure

Ensure fitting is leak-tight (see Section 6.2.2)

Operate pump carefully for 5 minutes

Are there any traces of medium visible on the head?

Ensure pump is free of crystallising, adhesive or curing media

Flush pump with a suitable neutralising liquid in a circular flow for 10 minutes

Flush with distilled water for 5 minutes

Flush pump with a suitable neutralising liquid in a circular flow for 10 minutes

Flush with distilled water for 5 minutes

Refer to Chapter 12 for parts replacement

9.4 Cleaning / Replacing Valve Plates and Pump Diaphragm

WARNING — Danger from hazardous materials