Orifice Plate Head loss

F

Thread Starter

Forat

Dear Control Community,

I am looking at Dwyer Series OP Orifice Plate Flow meter.

There it mentions that the Head Loss is: 1 - (Beta ratio)^2 e.g if Beta = 0.7, Head Loss = 1 - 0.49 = 0.51, which corresponds to 51% dp

What I understand is having this orifice plate, will cause a pressure loss of 51%.

Isn't 51% Pressure Loss a lot for an Orifice Plate? especially since the OP depends on differential pressure to measure the flow, or did I misunderstood what Head Loss means?

Kindly help me on this matter.

Regards,
Forat
 
Forat,

I believe the head loss is 51% of the measured differential pressure, not the line pressure. So if the differential pressure were 100 mm H2O, then the permanent head loss would be 51 mm H2O.
 
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