Valve Symbols Introduction: A Comprehensive Guide to Understanding Different Types
Valve Symbols Introduction: A Comprehensive Guide to Understanding Different Types
Faced with a wide variety of valves, how can we quickly identify and apply them?. Each valve has different structures, connection methods, and operation methods. In order to represent and understand these differences, multiple symbols are needed to distinguish them. So understanding the valve symbols an imperative skill for engineers and technicians alike.
Valve Symbols
In order to help everyone understand the symbolic representation of various valves more intuitively, a complete set of valve illustrations is attached.
Valve Type | Usage |
Use linear motion to start and stop the flow. | |
Used for regulating or isolating flow. | |
Used to prevent backflow, allow flow in one direction only. | |
Used a ball to control flow to provide easy on-off control. | |
Used for precise regulation of fluid flow. | |
Safety/Relief Valve | Used to protect systems from overpressure situations. |
Pressure Reducing Valves | Used to reduce a higher inlet pressure to a steady lower downstream pressure. |
Introduction to basic valve parameters
Valves are essential components used in a variety of industries to regulate the flow of fluids in piping systems. When it comes to vales’ size, three common units are often used: inches, DN (nominal diameter), and millimeters.
1. DN
In valves, DN commonly represents "Nominal Diameter" in English. Essentially, DN refers to the approximate inside diameter of the pipe or the valve's flow passage.
2. De
De commonly represents outer diameter of pipe. De generally used to describe pipes that need to be marked with thickness. For example, DN20 De25×2.3mm; DN25 De32×3.0mm.
3. D
D generally refers to the inner diameter of the pipe.
4. d
d represents the inner diameter of the concrete pipe.
5.Φ
Φ refers to the diameter of a common circle, which is used here to indicate the outer diameter of the pipe, that is, the outer diameter of the pipe including the pipe wall thickness.
Conclusion
Qingdao Fluido ooffers a wide variety of valves. Understanding valve symbols is a vital skill in the field of process control and engineering. Whether it is a butterfly valve, gate valve or ball valve, each valve has its own unique symbol.Mastering these symbols will prove exceptionally beneficial in designing, operating, and troubleshooting process systems effectively.