M&C TechGroup MP47 Ex Operator's manual - Handbuch (Seite 39)

Diaphragm Pumps PJ19424-726 Design and function
Translation of Original Operating- and Installation Instructions, english, KNF PJ19424-726 01/13 11
5. Design and function
Design
1 Outlet
2 Inlet
3 Capacitor
4 Pump
head
5 Pump type plate
6 Motor
7 Motor type plate
Fig. 1: Diaphragm pump (shown with motor from KNF)
Function
1 Outlet valve
2 Inlet valve
3 Transfer chamber
4 Diaphragm
5 Eccentric
6 Connecting rod
7 Pump
drive
Fig. 2: Pump head
The pumps transfer, compress and evacuate gases and vapors.
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 pumps can be used as vacuum pump or compressor. How-
ever, pressure and vacuum cannot be generated simultaneously.
1 2 3
4 5 6 7