I have 5 pumps running parallel (transferring water). Due to pressure fluctuation at discharge (depends on flow requirement of user), I'm planning to install pressure control valve at discharge of the pumps to maintain the pump running at optimum condition. My candidate is a globe valve, but because the line size is quite big (14 in.), the globe valve is not adequate for that application. My engineering consultant suggest to a use butterfly type. According to our experience, using this kind of valve is not effective for pressure control. I need your suggestion as to what kind of valve I have to use when I have a 14-in. discharge.
Have an insight or suggestion?
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Re: Determine valve type
12 January 2007 at 1:29pmI would not consider myself a valve expert, but I would suggest that any valve that is going to be used for pump-throttling purposes will have a tendency to create considerable turbulence upstream of the valve. In view of this, the valve should be located in a discharge pipeline that is at least one size larger than the pump discharge nozzle, and at a considerable distance from the pump in order that the pump be protected from the turbulence that will be created.
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