TDH calculation

[bragamor]

We use a centrifugal pump to direct our chill water into the system. We have a pressure indicator at the outlet of the pump. Can I use this pressure as my TDH?

thanks for your help on this one

 

[ione]

The Total Differential Head is the difference between the pressure head at the discharge and suction flange of the pump. You need information on suction side

 

[rmw]

And once you determine that, you may have to correct the gauge reading to the datum point on the pump. Most pumps are rated at the centerline of the outlet flange or some other similar point. On larger pumps there can end up being several feet from a gauge on top of the pipe to the CL of the discharge pipe.

rmw

 

[bragamor]

thank you both for your responses.

 

[knapee]

TDH (meter )= diff. Preesure (bar) * 10.21/SG
TDH (feet) = diff. Pressure(psi) * 2.31/SG

thanks

 

[Pumpsonly]

Please clarify what you mean by TDH..
It also stand for total dynamic head which is of the system..