Complete Guide to the Different Types of Valves

Complete Guide to the Different Types of Valves

A valve is fundamentally a device designed to regulate the flow of a medium—be it liquid, gas, or solid—through a piping system. Valves predominantly serve to start or stop the flow, while some advanced types of valves, termed control valves, can also manage the flow rate effectively.

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Given the diverse applications of valves, they are available in a multitude of mechanical configurations. Selecting the right valve for a specific task ensures that your system operates efficiently and safely.

While valves can be categorized in many ways, they primarily fit into three main classifications: rotary, linear, and self-actuated valves.

Rotary Valves

Rotary valves operate using a rotating closure element to manage flow within a piping system. Typically, this rotation covers 90 degrees, earning these valves the nickname "quarter-turn valves." In this setup, a valve is closed at 0 degrees and fully open at 90 degrees.

Some rotary valves can function with a wider rotation angle and feature multiple positions. Common examples include butterfly, plug, and ball valves.

Linear Valves

Linear valves employ a flow obstructer—like a disc, plate, or diaphragm—that shifts in a straight line to control starting, stopping, or adjusting flow within a pipeline. This category can be further divided into rising stem (multi-turn) and axial types.

Multi-turn linear valves are ideal for control applications and encompass globe valves, gate valves, and needle valves. In contrast, axial valves, such as coaxial and angle seat valves, are rapid-acting solutions primarily utilized for on/off applications.

When compared to rotary valves, linear motion valves generally exhibit longer cycle times.

Self-actuated Valves

Distinct from rotary and linear valves, self-actuated valves operate without direct user input, using pressure from the process line to either open or close a valve. They often serve as pressure relief valves, activating only when the system reaches maximum allowable pressure. Consequently, self-actuated valves are considered crucial safety devices in specific applications.

Common types include relief valves, safety valves, check valves, and steam traps.

In conclusion, understanding the various types of valves is fundamental for achieving optimal performance in fluid management systems. For those interested in enhancing their knowledge about valve configurations and applications, visiting YIYUAN could be of great benefit.

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