What is Van End? Uses and applications in industrial tank systems

26/02/2019 9201

WHAT IS A BREATHER VALVE? FUNCTIONS AND APPLICATIONS IN INDUSTRIAL STORAGE TANKS

In fuel, chemical, and industrial liquid storage systems, controlling internal pressure is extremely important. The breather valve is an indispensable device that ensures safety, stability, and minimizes risks during operation.

1. What is a breather valve?

A breather valve (also called a tank vent valve) is installed on the top of sealed storage tanks to:

Release excess pressure when the tank is over-pressurized
Balance pressure when the tank is under vacuum
Keep the tank in a safe state during filling and emptying

This prevents deformation, cracking, or vacuum collapse during operation.

2. Structure of a breather valve

A breather valve typically consists of:

Valve body (cast iron, stainless steel, or steel)
Pressure release disc
Vacuum intake disc
Adjustable spring
Dust/insect filter screen
Sealing gasket
Protective cover

All components are designed to ensure tightness, durability, and stable performance in industrial environments.

3. Operating principle

The valve works automatically based on pressure balance:

During filling → pressure rises → valve opens to release vapor
During emptying → pressure drops → valve opens to draw in air
When pressure is stable → valve closes completely

This mechanism keeps the system safe without manual intervention.

4. Functions of a breather valve

Balance tank pressure
Prevent tank deformation or collapse
Reduce vapor loss of fuel or chemicals
Lower fire/explosion risks from flammable vapors
Protect tanks and pipelines
Extend equipment lifespan

5. Common types of breather valves

Standard breather valve: For simple, low-pressure tanks
Pressure-vacuum breather valve: Controls both positive and negative pressure, widely used in industry
Flame arrestor breather valve: Equipped with flame arrestor mesh, used in fuel and volatile chemical storage

6. Practical applications

Breather valves are widely used in:

Fuel tanks and filling stations
Chemical warehouses
Paint and solvent factories
Industrial water tanks
Food and pharmaceutical liquid storage

They are essential in any liquid storage system with volume changes.

7. Notes when selecting a breather valve

Choose the right type based on medium and tank capacity
Select suitable material (stainless steel, cast iron, steel)
Regularly check filters and gaskets
Install at the correct position on the tank top
Use products from reputable suppliers

8. Conclusion

Breather valves are critical devices that ensure tank safety during operation. Choosing the right valve not only stabilizes system performance but also extends equipment life and reduces risks.