KNF Laboport N811 KN.18, Operating Instructions Manual

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Mini Laboratory pumps N 86.18, N 811.18 Servicing
Translation of original Operating Instructions, English, KNF 121435-121438 04/18 17
8. Servicing
8.1. Servicing Schedule
Component Servicing interval
Pump Regular inspection for external damage
or leaks
Filter (Accessory) Replace if it is dirty
Diaphragm and valve
plates/sealings (valve
plates) Replace at the latest, when pump
output decreases
Tab. 9
8.2. Cleaning
When cleaning, make sure that no liquids enter the inside of
the housing.
8.2.1. Flushing Pump

Before switching off the pump, flush it with air (if neccesary for
safety reasons: with an inert gas) for about five minutes under
atmospheric conditions (ambient pressure).
8.2.2. Cleaning Pump

As far as possible, clean the parts with a dry cloth.

Only use solvents for cleaning if the head materials cannot be
attacked (check the resistance of the material!).

If compressed air is available, blow out the components.
8.3. Changing Diaphragm and Valves
8.3.1. N 86 K_.18

Pump is switched off and mains plug is removed from the
socket

Pump is clean and free of hazardous materials

Tubes removed from pump’s pneumatic inlet and outlet
Spare part/tool
Service Set (according to chapter 10)
Philips-head screwdriver No. 1
Small screwdriver, blade width 0.5 mm
Pencil
Tab. 10

Always replace diaphragm and valve plates together to main-
tain the pump performance.
Conditions
Spare part/tool
Information on procedure
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