Definition
A valve regulates, directs, or stops the flow of a fluid or gas by opening, closing, or partially obstructing a passage within a piping system. It is the general category of flow-control devices, of which a control valve (continuous flow modulation) and solenoid valve (electromagnetic actuation) are specific, more particular types.
Key facts
- The general category term for flow-regulating devices, not a specific actuation method or control approach.
- Basic functions include fully stopping flow (shutoff), fully allowing flow, or partially restricting it, depending on valve design.
- Control valve and solenoid valve are specific types within this general category, distinguished by their particular actuation and control characteristics.
- Common failure symptoms include seal leakage, incomplete closure, and actuator or positioner malfunction.
How does Valve work or appear?
A valve controls the passage of a fluid or gas through a system by mechanically opening, closing, or partially restricting an internal flow path, ranging from a simple manual shutoff to a sophisticated, precisely modulated flow-control device depending on the specific type and application.
How it relates to a control valve and solenoid valve
Valve is the general category. A control valve is a specific type designed for continuous, modulated flow control in response to a process signal. A solenoid valve is a specific type actuated electromagnetically, typically for simple on/off switching rather than continuous modulation; both are specific valve designs suited to particular control needs.
FAQ
Frequently asked questions
How does a valve influence the flow of a medium?
A valve influences it by opening, closing, or partially restricting a passage within a piping system, ranging from simple shutoff to precise, continuous modulation depending on the specific valve type.
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