Pulsafeeder PULSAlarm - Manual (Page 9)

9
3. Setup for Vacuum system
A vacuum must be maintained at all times during
pump operation, otherwise, the diaphragm halves
may separate during the suction stroke of the
pump, reducing flow capacity and potentially
damaging the diaphragm.
Pumps incorporating the leak detection option are
shipped from the factory with the system
evacuated to the operating vacuum of 650 mm Hg
(26 in. Hg). Due to flexure of the PTFE
diaphragms during transit and storage, the initial
vacuum may not be present at startup. When this
occurs, re-evacuate the system to the operating
vacuum of 650 mm Hg (26 in. Hg).
In all cases, it is advisable to assume vacuum
needs to be renewed if the pump has been out of
service.
Figure 4 – vacuum system
To Apply Vacuum:
1. Connect a vacuum pump capable of generating 26 inches of vacuum to the vacuum port and
evacuate the system. A hand-operated vacuum pump is generally appropriate for this
procedure.
2. Open the needle valve on the vacuum port assembly.
3. Operate the vacuum pump to evacuate the system
4. Close the needle valve
5. Remove the vacuum pump.
6. If required, verify system operation and electrical connections.