KNF Laboport N811 KN.18, Operating Instructions Manual

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Servicing Mini Laboratory pumps N 86.18, N 811.18
20 Translation of original Operating Instructions, English, KNF 121435-121438 04/18
8.3.2. N 811 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. 11

Always replace diaphragm and valve plates/sealings together
to maintain the pump performance.
WARNING
Health hazard due to dangerous substances
in the pump!
Depending on the substance transferred, caustic
burns or poisoning are possible.

Wear protective clothing if necessary, e.g.
protective gloves.

Flush pump before replacing the diaphragm and
valve plates/sealings (see chapter 8.2.1).
Removing pump head
1. Mark the position of head plate (Fig. 7/ 3 ), intermediate plate
( 2 ), cover ( 5 ) and cover plate ( 6 ) by a drawing line with a felt-
tip pen. This helps to avoid incorrect assembly later.
2. Undo the 4 screws ( 4 ) in the head plate ( 3 ) and lift the head
plate together with intermediate plate ( 2 ) off the pump hous-
ing.
Conditions
Spare parts/Tools
Information on procedure
Fig. 7: Removing pump head