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An adjustable restriction with a compensating element.
Also known as: Compensated flow control, Constant flow valve symbol
In ISO 1219 fluid power diagrams a pressure-compensated flow control adds a compensating spool to an adjustable restriction, holding the flow rate steady as the load pressure changes.
Maintains a set flow rate independently of the pressure difference across the valve.
Contexts: Technical drawing
Keeps an actuator moving at a constant speed as its load varies, which a plain restriction cannot do.
Contexts: Technical drawing
A pinched line marking the restriction, drawn inside a dashed square alongside a spring-loaded compensating spool.