Diaphragm pump N87TTE Ex
Design and function
Translation of Original Operating- and Installation Instructions, english, KNF N87TTE Ex 01/13
12
5. Design and function
Design
1
Outlet
2
Inlet
3
Pump
head
4
Capacitor
5
Motor base plate
6
Motor type plate
7
Motor
8
Pump type plate
Fig. 1: Diaphragm pump (shown with motor from KNF)
Function
1
Outlet
valve
2
Inlet
valve
3
Transfer
chamber
4
Structured
diaphragm
5
Eccentric
6
Connecting rod
7
Pump
drive
Fig. 2: Pump head
The pump transfers, compresses and evacuates gases and va-
pors.
The elastic diaphragm (
4
) is moved up and down by the eccentric
(
5
) and the connecting 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.
The pump can be used as a vacuum pump or a compressor.
However, pressure and vacuum cannot be generated simultane-
ously.
