Flow Control Valves


A flow control valve is designed to deliver constant flow. The valve’s operation is based on the principal that for a constant head loss across an orifice a constant flow will be delivered. A flow control valve has an orifice designed to deliver the required flow at a known head loss. A flow control pilot senses the head loss across the orifice and modulating the valve to keep it constant. If the head loss is too high it gradually closes the valve; if it’s too low it gradually opens it.
Typical Applications
A flow control valve delivers a constant flow rate independent of pressure conditions. Typically flow control valves may be used on a pipeline delivering water to multiple users to ensure adequate flows to all of them. Another common application would be on the backwash manifold of sand filtration systems operating in varied pressure conditions.
Plumbing Diagrams
See our Downloads for some typical control control valve configurations. Other configurations are available on request.
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