Design and function Diaphragm pump N85, N86
14 Translation of original Operating and Installation Instructions, english, KNF 121258-121528 01/20
Design N86K_DC-B
Fig. 5: Design N86K_DC-B
Function Diaphragm Pump
Fig. 6: Pump head
Diaphragm pumps transfer, compress (depending on pump ver-
sion) and evacuate gases and vapors.
The elastic diaphragm (4) is moved up and down by the eccentric
(5) and the connection rod (6). In the downward stroke it aspirates
the gas to be transferred via the inlet valve (2). In the upward
stroke, the diaphragm presses the medium out of the pump head
via the outlet valve (1). The transfer chamber (3) is hermetically
separated from the pump drive (7) by the diaphragm.
2 Inlet (suction side)
3 Electrical connection
4 Motor
2 Inlet valve
3 Transfer chamber
4 Diaphragm
5 Eccentric
6 Connection rod
7 Pump drive
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