M&C TechGroup MP47 Ex Operator's manual - Handbuch (Seite 44)

Diaphragm Pumps PJ19424-726 Operation
Translation of Original Operating- and Installation Instructions, english, KNF PJ19424-726 01/13 16
7.1. Information on switching pump on and off
Switching pump on
The pump may not start up against pressure or vacuum during
switch-on. This also applies in operation following a brief power
failure.
Î Make sure that normal atmospheric pressure is present in the
lines during switch-on.
Switching pump off
Î KNF recommends: When transferring aggressive media, flush
the pump prior to switch-off (see Section 8.2.1) to increase the
service life of the diaphragm.