Diaphragm liquid pump NF 1.25
Assembly and function
KNF Flodos AG
BA_NF1.25_EN_03_163242
Translation of Original Operating and Installation Instructions, English
9
5. Assembly and function
Basic elements
1
Outlet
2
Inlet
3
Connecting plate
4
Drive
5
Connecting leads
6
Head plate
7
Intermediate plate
Fig. 1: Diaphragm liquid pump NF1.25
1
Outlet valve
2
Inlet valve
3
Working chamber
4
Diaphragm
5
Eccentric
6
Connecting rod
7
Pump drive
Fig. 2: Pump assembly
Diaphragm liquid pumps are based on reciprocating displacement
pump technology. The elastic diaphragm (
4
) is moved up and
down by the eccentric (
5
) and the connecting rod (
6
). In the down-
ward stroke it aspirates the medium to be transferred via the inlet
valve (
2
). In the upward stroke, the diaphragm pushes the medium
out of the pump head via the outlet valve (
1
). The diaphragm
hermetically seals off the working chamber (
3
) from the pump drive
(
7
).
