Centrifugal pump thermal relief equation....

[quizzical1]

Hi All,

NFPA 20 4.13.1.4 states “The valve shall provide sufficient water flow to prevent the pump from overheating when operating with no discharge”.
Does anyone know where I can find the equations or an online calculator to quantify the required flow for keeping an idling centrifugal pump cool?

thanks,

Q~

 

[LittleInch]

Normally min flow is about 30% of rated flow.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[Jacc]

This sub forum is for Fluid Power as in Hydraulics and Pneumatics.

Try the Pump sub forum:

https://www.eng-tips.com/threadminder.cfm?pid=407