diesel fire water pumps

[Samingme755]

hi
for diesel fire water pump diesel engine shall be designed for designed for continuous operation or not in other way does the diesel pump need to be suitable for Open valve start-up considering that pump is for Emergency Fire pump application.
thanks in advance

 

[Artisi]

What do you mean by continuous operation, a diesel fire pump is designed to run until the fire is brought under control, that could be 5 minutes or 5 hours, plus they must start under any conditions, otherwise they are useless as a fire pump.
My suggestion is to do some research on fire pumps so you fully understand their operating requirements.

 

[pierreick]

A diesel fire pump is a backup in case of power outage. It should have the same requirement than an electric fire pump. (performance/certification).
Your statement " that pump is for Emergency Fire pump application" is totally wrong. Check relevant standards and communicate with your local fire brigade.
Pierre

 

[LittleInch]

Diesel and electric FW pumps have to be robust and deal with a wide range of operations without failure.

So yes, that is a possibility if your jockey pump has failed and / or someone has opened a hydrant and flowed out water before the fire pump starts.

Hence why Fire pumps are usually built "big" and "strong", but not very efficient.

 

[Snickster]

Firewater pumps should comply with NFPA 20. See attached presentation by Clarke diesel engines..

 

[Artisi]

NFPA doesn't necessarily rule, depends on country and insurance underwriters

 

[georgeverghese]

Check the process control narratives for this pump auto start sequence.

 

[pierreick]

Hi,
an old copy of NFPA 20

Pierre

 

[pierreick]

Another document for reference

Pierre

 

[DaveyMalaysia]

hi
for diesel fire water pump diesel engine shall be designed for designed for continuous operation or not in other way does the diesel pump need to be suitable for Open valve start-up considering that pump is for Emergency Fire pump application.
thanks in advance

It might not be possible, as the diesel pump you're using may overheat upon continuous operation.

 

[LittleInch]

It might not be possible, as the diesel pump you're using may overheat upon continuous operation.

No.

Diesel fire water pumps are designed not to overheat.

 

[SB1976]

Hi,
(1) Fire Water pumps, either diesel engine driven or electric motor driven has to deliver at least 150% of rated flow. This is as per NFPA 20. As such, this automatically covers end of curve flow in all practical sense.

(2) In case of Diesel Engines in FW service, the inbuilt fuel tank (mounted alongwith the engine) is usually for a very few hours, while the diesel day tank may be for 8 hours to 24 hours. As such, even if we want to, "continuous" duty for diesel engine cannot practically be ensured.