In-line Breather Valve

In modern petrochemical, pharmaceutical and fine chemical storage and transportation systems, connecting the breathing emissions of storage tanks to recovery or centralized treatment pipelines has become a common practice to improve environmental standards and economic benefits. The In-line Breather Valve is a core safety device tailored for such closed venting working conditions. Installed in series between the storage tank and the recovery or discharge main pipeline, it acts as a precise "pipeline pressure regulator". While maintaining the pressure balance inside the tank and reducing medium loss, it ensures the tightness and process integrity of the entire discharge path, serving as a key safety hub connecting the storage tank and the downstream treatment system.

Core Functions & Working Principle

The valve remains fully sealed under normal conditions. When the internal pressure exceeds the set positive pressure value due to tank filling, temperature changes or gas generation, the pressure disc opens and the overpressurized gas is released to the connected recovery pipeline. Conversely, when a vacuum is formed inside the tank due to discharging or cooling and exceeds the set value, the vacuum disc opens to draw in gas (such as air or nitrogen) from the pipeline to balance the pressure. After the pressure is restored, the disc resets quickly to form a tight seal again. This precise cycle of "exhalation" and "inhalation" is carried out automatically in the closed pipeline system, which not only protects the tank structure but also realizes the effective control and recovery of Volatile Organic Compounds (VOCs).

Key Product Advantages & Customer Value

Excellent Sealing Performance & Precision: Adopts a unique dual-guide valve core system to ensure smooth lifting of the disc, extremely low wear and long sealing life. Its leakage rate is far below the strict API 2000 standard, and it achieves industry-leading ±3% set pressure accuracy, ensuring precise and reliable protection actions and minimizing unorganized emission of media.
Designed for Pipeline Integration: With a compact structure, it is directly connected to the tank outlet and recovery pipeline through flanges to form a seamless closed system. This avoids the pollution and safety risks of open discharge, and is perfectly suitable for Vapor Recovery Units (VRU), nitrogen blanketing systems and environmental protection treatment processes.
High Reliability & Easy Maintenance: The internal components of the valve are made of high-quality corrosion-resistant and chemical-resistant materials (such as stainless steel and PTFE seals), with stable performance. It has a wide operating temperature range (-45°C to +260°C). The valve core and valve seat assembly adopt a modular design, which can be quickly replaced on-site, greatly simplifying maintenance work and reducing the full-life-cycle operation and maintenance costs.
Sensitive Response & High Flow Efficiency: The valve can reach the fully open state when the set pressure is exceeded by only 10%, with sensitive and rapid opening and closing actions. The optimized internal flow channel design ensures large ventilation capacity and low pressure drop, without affecting the normal breathing of the storage tank and the operating efficiency of the pipe network.
Global Standard Compatibility & Flexible Configuration: A complete size range from 1.5 inches (DN40) to 12 inches (DN300) is available, with a wide range of pressure and vacuum settings (pressure: 0.2-100 KPa, vacuum: 0.2-4.3 KPa). Flange connections support global mainstream standards such as ANSI, DIN and HG/T20592~20635-2009, ensuring perfect connection with international projects.

Typical Applications

Gasoline and chemical storage tanks equipped with vapor recovery systems.
Solvent and pharmaceutical intermediate storage tanks adopting nitrogen sealing.
Storage tanks that need to direct breathing waste gas to environmental protection treatment devices such as incinerators and scrubbers.
Any atmospheric or low-pressure storage tank that requires closed discharge, prevents air pollution and needs precise pressure control.

Our Commitment

Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. is a professional manufacturer of storage tank safety and environmental protection equipment. With advanced technology and a strict quality management system, we ensure that each in-line breather valve has high performance and reliability.

We provide:

Professional engineering selection: Recommend the best model according to your medium, operating pressure, temperature and pipeline system requirements.
Customized production: Manufacture according to your specified materials, flange standards and special pressure/vacuum settings.
Complete technical delivery: Provide detailed product manuals, installation guides and performance data sheets.
Reliable global supply: Adopt sturdy export packaging to ensure the safe delivery of products to your global project sites.

A reliable bridge connecting storage tanks and green processes. Choose Wan'an In-line Breather Valve to help your operation be safer, more environmentally friendly and more efficient with precise closed pressure control.

Welcome to contact us for detailed technical parameters and targeted quotations!

About us

Customer services

Sell on waimao.163.com