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How to Read Industrial Valve Markings | ANSI, DIN, JIS Complete Guide

15/04/2026

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.

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