The operating principle: there are two modes of operation manually or automatically.
- Fire fighting system typically consists of three pumps: one main pump electric, diesel pump 1 and 1 electric pressure compensated pump, the pump capacity is calculated based on the flow rate and pressure pipe.
- The purpose of the pump pressure compensator: used to maintain pipeline pressure around the set value.
- The purpose of the pump power: the actual use of fire, needs a lot of water so often we design a pump flow and pressure head big boot pump circuit is generally triangular star.
- The purpose of the diesel pump is running on behalf of the pump power when there is a fire but also lost power simultaneously to the electric pump does not work.
Example: A system consists of: 1 22,5KW electric pump, diesel pump 22,5KW 1, 1 pump pressure compensator 4.5KW
- Hand mode: press run and stop the pump by pressing the button on the front of the cabinet.
- Automatic Mode: When you start operating the pump power reaches 7kg / cm3 is deactivated. When the pressure in the pipeline dropped 6kg / cm3, the pressure compensated pump operation, when the pressure in the pipeline dropped 5kg / cm3, the large electric pump will run to provide reaching 7kg / cm3, then stopped.
- When the pressure dropped to 3 kg / cm3, the diesel pump starts operating when the pressure reached 7 kg / cm3, all the pumps stop working.
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