What is a Pressure and Vacuum Valve?

What is a Pressure and Vacuum Valve? (First Line of Defense for Storage Tanks)

Pressure and Vacuum Valves, also known as Vent Valves, are critical devices in storage tank systems. Their main function is to protect tanks from overpressure or vacuum, thus preventing possible fractures, spills, implosions, or explosions.

How Do They Work?

Overpressure
When there is overpressure in the tank (due to temperature increase, tank filling, etc.), the pressure disc of the valve automatically opens, allowing excess vapor to escape safely. Once the pressure normalizes, the valve closes again.

Vacuum (Negative Pressure)
The vapors inside the tank react to a temperature drop or tank emptying. When the internal tank pressure decreases, it needs compensation to maintain balance. The valve's vacuum disc opens, allowing air to enter until equilibrium is restored, then closes again.

Why Install Pressure and Vacuum Valves on Storage Tanks?

• Personnel Protection: Reduces the risk of worker injuries caused by overpressure or vacuum accidents.
• Environmental Protection: Prevents uncontrolled release of emissions into the atmosphere, thus reducing negative contributions to global warming.
• Regulatory Compliance: They are an essential requirement in many industrial safety regulations and risk premiums.

Can a Pressure and Vacuum Valve Fail?

Valves that have been installed for a long time can fail due to the following reasons:

• Corrosion: Exposure to corrosive chemicals can damage the valve.
• Obstruction: Sediment or particle buildup can prevent the valve from opening properly.
• Malfunction: Improper design or incorrect installation can cause problems.
• Lack of Maintenance: Skipping regular inspections and calibrations can lead to valve deterioration.

Therefore, it is important to perform maintenance and operation checks on Pressure and Vacuum Valves at least once a year.

The Importance of ISO 9001 Certification for Pressure and Vacuum Valves

In the field of safety for storage tanks, precision and reliability are essential. Equipment must not only meet the highest quality standards but also ensure the safety of installations and personnel working with these systems.

A failure in safety equipment can have serious consequences, making ISO 9001 certification even more relevant. Certification ensures that all products and services comply with the strictest quality standards, minimizing any margin of error.

Conclusion

Pressure and Vacuum Valves are a fundamental part of the safety systems for storage tanks. Their proper functioning is essential to guarantee the safety of people and the environment. By using high-quality valves and performing proper maintenance, companies can significantly reduce the risk of accidents and comply with current regulations.