How to Read Industrial Valve Markings – Technical Engineering Guide

In piping and industrial systems, understanding industrial valve markings is extremely important. These markings help engineers identify valve types, standards, materials, and pressure ratings.

Incorrect interpretation can lead to wrong selection and system failure risks.

1. What Are Industrial Valve Markings?

Industrial valve markings are information engraved or attached to the valve body (nameplate), including:

• Valve type
• Design standard
• Pressure rating
• Material
• Size specification

2. Common Valve Type Symbols

🔹 Valve types:

• Gate Valve (GV)
• Globe Valve (GL)
• Check Valve (CV)
• Ball Valve (BV)

3. Standard Markings

🔹 Common standards:

• ANSI / ASME (USA)
• DIN (Germany / Europe)
• JIS (Japan)

Examples:

• ANSI B16.34
• DIN 3352
• JIS 10K

4. Pressure Rating Markings

• Class 150
• Class 300
• Class 600
• PN16 / PN25 / PN40

👉 This indicates maximum allowable working pressure.

5. Material Markings

• WCB (Carbon Steel)
• A105 (Forged Carbon Steel)
• CF8 / CF8M (Stainless Steel 304/316)
• LF2 (Low temperature steel)

6. Example of Valve Marking

Example:
A105 – 800LB – 2” – ANSI B16.34 – GATE VALVE

👉 Explanation:

• A105: forged carbon steel material
• 800LB: pressure class 800
• 2”: valve size
• ANSI B16.34: design standard
• Gate Valve: valve type

7. Meaning of Key Markings

• SIZE (DN/NPS): pipe size
• PRESSURE (PN/Class): pressure rating
• MATERIAL: construction material
• STANDARD: design standard
• FLOW DIRECTION: flow direction

8. Why Understanding Valve Markings Is Important

• Avoid incorrect valve selection
• Ensure system safety
• Increase pipeline lifespan
• Easy maintenance and replacement
• Compliance with international standards

9. Industrial Applications

• Oil & gas plants
• Steam systems
• Chemical industries
• Power plants
• High-pressure pipeline systems

10. Important Notes When Reading Valve Markings

• Do not confuse PN and Class ratings
• Always verify ANSI / DIN / JIS standards
• Confirm material compatibility with working conditions
• Check technical datasheets carefully

11. Reliable Industrial Valve Supplier

For technical consultation or valve selection support, contact:

Phuc Minh Engineering Co., Ltd
🌐 Website: pm-e.vn
📧 Email: info@pm-e.vn
📱 Hotline: +84 907 450 506 – +84 902 720 814 – +84 979 737 351

👉 We provide:

• Industrial valves with ANSI, DIN, JIS standards
• Full CO-CQ documentation
• Technical project support
• Genuine imported products

CONCLUSION

Understanding industrial valve markings helps engineers select the correct equipment, ensuring safety and optimizing system performance.