User`s guide

5-2

Maintenance and Troubleshooting 5

Pump Head Maintenance

The check valves and filters can be cleaned. Piston

seals, check valves, piston assemblies, anti-extru-

sion gaskets and return springs should be replaced

on a regular basis. A maintenance kit is available

for each model of pump head. For details about

maintenance kits and procedures, see the User’s

Guide for your pump head.

The use of equipment for continuous, unattended

operation is becoming more and more important.

For this reason, the following table gives an indica-

tion of replacement periods of maintenance parts

according to the type of use, intensive, regular or

occasional. The data in the table below assumes

that the pump is working at half of its maximum

flow rate and pressure. The nature of the liquid

and the pump head model have only a small

influence on these figures.

Time table for checking replacement parts accord-

ing to the type of use.

Parts/Use Intensive Regular Occasional

(168 h/week) (40 h/week) (10h/week)

Piston seal 2 - 3 months 6 - 9 months 1 year

Set of check valves 3 - 6 months 1 year 2 years

Piston assembly 6 - 12 months 2 - 3 years 5 years

Anti-extrusion gasket 6 - 12 months 2 - 3 years 5 years

Return spring 1 year 2 - 3 years 5 years

The time between each mainte-

nance operation can be viewed

by using the Info soft key in the

Pump menu.