KNF N963, Инструкции по эксплуатации и монтажу

Страница: 20 / 32

Operation Diaphragm Pump N936
20 Translation of Original operating and installation instruction, English, KNF 320276-320275 09/19
Switching on the pump
The pump must not be started up against pressure or vacuum dur-
ing switch-on. This also applies during operation after a brief power
failure. If a pump starts up against pressure or vacuum, the pump
may block, causing the thermal switch to respond and the pump to
switch off.
à
Ensure that normal atmospheric pressure is present in the lines when
switching on.
Vapors as medium The service life of the diaphragm can be extended by preventing the for-
mation of condensate in the pump. Therefore:
à
Only perform work with saturated or nearly saturated vapors with a
warm pump.
à
KNF recommends: When transferring aggressive media, flush the
pump before switching off (see Chapter
9.2.1 Flushing the pump ) to ex-
tend the service life of the diaphragm.
Switching off/decommissioning
pump
à
At the end of an evacuation or a process, KNF recommends letting the
pump run for several minutes with air as the medium to remove con-
densate from the pump head (drying of the pump).
à
Establish normal atmospheric pressure in the lines (relieve pump
pneumatically).
Recommissioning
à
Before recommissioning, observe the applicable standards, guidelines,
regulations and technical standards at the electrical connection.
Inspecting the pump à
Inspect the pump periodically for external damage or leakage.