Diaphragm
–Liquid pump NF 10
Assembly and function
KNF Flodos AG BA_NF10_EN_05_069219
Operating and Installation Manual
10
5. Assembly and function
Assembly
1
Outlet
2
Inlet
3
Connection plate
4
Motor Drive
5
Motor leads
6
Head plate
7
Intermediate plate
Fig. 1: Diaphragm
–Liquid pump NF 10
1
Exhaust valve
2
Inlet valve
3
Working chamber
4
Diaphragm
5
Eccentric
6
Connecting rod
7
Pump drive
Fig. 2: Working principles
Diaphragm fluid pumps are based on reciprocating displacement
pump technology. An elastic diaphragm (
4
) is moved up and down
by the eccentric (
5
) and the connecting rod (
6
). During the down
stroke, the diaphragm sucks in the medium through the inlet valve
(
2
). During the up stroke, it forces medium out of the pump head
through the exhaust valve (
1
). The diaphragm hermetically seals
off the working chamber (
3
) from the pump drive (
7
).
