Recommended Velocity for 132" Butterfly valve

[ADAG]

Hello, I would like to know what is the max. recommended flow velocity for a 132" butterfly valve used as a water regulating valve in a dam. The water head is 125 feet.

I have looked on the AWWA standards but they only cover valves up to 72".

Thanks,

 

[4carats]

For water flow, recommended velocity at trim exit of control valve is 100 feet/sec., i.e. an exit trim fluid kinetic energy of 70 psi.

See P. 438, Practical Guide for Measurement and Control, Control Valves, ed. Borden, 1998, ISA.