TapFlo Guardian system Mk3.1, Руководство по эксплуатации и техническому обслуживанию

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DEAD-HEAD & RESTART (DH&R)
Issue : 020913-B TPUK-GU31X 30
Principle of operation
The Guardian monitors the fluid discharge pressure of the pump, changing it’s
output if the monitored pressure rises to the set point of the Guardian,
representing a closed valve or over pressure in the pump discharge line,
stopping the associate pump and automatically restarting it as the dead-head
condition is removed.
Fig. DH&R-01
Graph of time against pressure showing dead head and restart principle