Assembly and function
Diaphragm Liquid Pump NF 1.30
KNF Flodos AG BA_NF1.30_EN_04_067674.docx
8
Translation of original Operating and Installation Instructions
5. Assembly and function
Assembly
1
Outlet
2
Inlet
3
Head plate
4
Connecting plate
5
Intermediate plate
6
Motor
Fig. 1: Diaphragm liquid pump
1
Outlet valve
2
Inlet valve
3
Working chamber
4
Diaphragm
5
Eccentric
6
Connecting rod
7
Pump drive
Fig. 2: Pump assembly
The diaphragm liquid pumps are based on reciprocating displace-
ment 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
).
