What Is a Ball Valve? Structure, Working Principle, and Industrial Applications

WHAT IS A BALL VALVE?

A ball valve is an industrial valve used to start, stop, or regulate flow of liquids, gases, or steam in pipelines using a rotating spherical ball with a hole through it.

When the hole aligns with the flow → valve is open.
When rotated 90 degrees → flow is completely blocked.

Ball valves are one of the most widely used valves due to:

• Fast operation (quarter-turn 90°)
• Excellent sealing performance
• High durability
• Simple operation

BALL VALVE STRUCTURE

A typical ball valve consists of:

1. Valve Body

Outer shell that withstands pressure (stainless steel, carbon steel, cast iron)

2. Ball

Spherical closure element with a bore

3. Stem

Connects actuator/handle to the ball

4. Seats & Seals

PTFE, RPTFE materials for tight sealing

5. Handle / Actuator

Manual lever or automatic pneumatic/electric actuator

WORKING PRINCIPLE

• OPEN: bore aligned with pipeline → flow passes
• CLOSE: ball rotates 90° → flow blocked

This makes ball valves ideal for quick shut-off systems.

TYPES OF BALL VALVES

• Stainless steel ball valve
• Carbon steel ball valve
• Flanged ball valve
• Threaded ball valve
• Pneumatic ball valve
• Electric ball valve

ADVANTAGES

✔ Fast operation
✔ High sealing capability
✔ Low maintenance
✔ Suitable for automation

APPLICATIONS

• Water systems
• Oil & gas
• Chemical industry
• Steam systems
• HVAC systems
• Fire protection

CONTACT – PHUC MINH ENGINEERING

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