Maintenance; General Maintenance; Replacement Recommendations For Wearing Parts; Replacing The Diaphragm And Pump Head - Ecolab PDP II Notice Technique

10.

Maintenance

ATTENTION
10.1

General maintenance

NOTE
Quarterly maintenance interval, shorter intervals if load is greater (e.g. constant running).
It is recommended that the following be checked:
• Suction and pressure line for leak-free connection
• Suction and pressure valve for soiling and sealing function
• Check exit hole on intermediate pump section (membrane break)
• Check correct pumping by suction drive
• Metering head screws
The lifetime of the membrane depends on:
Counterpressure, operating temperature and metering material.
NOTE
Frequent checking of the membrane is recommended at extreme temperatures and when
metering abrasive materials.
10.2

Replacement recommendations for wearing parts

Diaphragm cartridge:
Valves:
Grease piston lip seal: Lubricate every 3 years
10.3

Replacing the diaphragm and pump head

Before any work is done on the valves or the metering head, the metering head must be
WARNING
emptied. Attention should be paid to instructions on the product datasheet for the material
being metered.
10.3.1

Changing the suction- and pressure valve

Fig. 10.1
417101420_pneum_II.doc
Metering pumps may only be maintained by expert, authorised personnel.
exchange yearly or after 4000 operating hours
exchange yearly
Pos Description
1 Union nut pressure valve
2 Suction valve
3 O-ring pressure valve (12 x 2 mm)
4 O-ring suction valve (12 x 2 mm)
5 Pressure valve
6 Union nut suction valve
Disassamble suction valve (pos. 2) and pressure valve (pos. 5) with
open-ended spanner (SW 22).
Check that the O ring is fitted correctly (Items
installing the new suction or delivery valve.
Screw in the new suction (Item 2) and delivery (Item 5) valves in the
correct position (tightening torque 2-3 Nm).
- 39 -
3 & 4) prior to
Rev. 4-07.10