Essential details
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Product Introduction
Pressure/Vacuum Emergency Relief Valve
In high-risk industries such as petrochemicals and energy storage and transportation, storage tanks face not only the risk of extreme overpressure but also the possibility of emergency vacuum conditions. Standard pressure relief holes often cannot handle these two extreme situations simultaneously. The Pressure/Vacuum Emergency Relief Valve is an all-round ultimate safety barrier designed for this purpose. It integrates dual functions of high-pressure relief and high-flow vacuum intake. As the last line of defense on the top of storage tanks, it is specifically designed to handle the most severe conditions such as fire overpressure and emergency vacuum pumping. Both its discharge and intake capacities comply with strict standards, serving as a "composite safety guardian" to protect the structural integrity of large storage tanks.
Core Functions & Superior Performance
This valve is used to handle extreme overpressure and vacuum conditions that cannot be coped with by standard tank vents. When the tank pressure rises sharply to the set pressure due to emergencies such as fires, its hinge cover opens quickly for large-scale pressure relief; after the pressure is eliminated, the hinge mechanism ensures the cover resets accurately. At the same time, when excessive vacuum is generated inside the tank due to operations such as emergency vacuum pumping, the built-in spring-loaded vacuum valve internal part is lifted, and the accumulated vacuum is quickly released. This "dual-mode" protection mechanism enables it to not only meet the emergency relief needs caused by fires but also provide high-flow emergency vacuum release.
Key Customer Value
- Dual Protection, All-in-One Valve: The pressure relief capacity strictly complies with the API 2000 standard, sufficient to cope with emergency relief caused by fires; the vacuum release function can handle emergency vacuum pumping conditions of media and provide high-flow intake. One valve solves two extreme risks, simplifying system design.
- Precise, Reliable and Ultra-Low Leakage: Adopting high-performance sealing and precision structure, its leakage rate is far below the API 2002 standard, and it ensures a high setting accuracy of ±3%, maintaining tight sealing in non-emergency states to avoid unnecessary medium loss.
- Robust, Durable and Easy to Maintain: It adopts a full-open structure, providing an unobstructed flow channel during relief. All components are made of high-quality corrosion-resistant materials (such as carbon steel, stainless steel, and special seals), suitable for harsh working conditions. All internal components can be replaced on-site, making maintenance simple and reducing the full life-cycle cost.
- Authoritative Certification and Reliable Design: Certified discharge curves are provided to offer a reliable engineering basis for safety system design. Each valve undergoes strict inspection and leakage testing before leaving the factory to ensure foolproof performance at critical moments. Flange connections support global mainstream standards such as ANSI, DIN, and HG/T20592~20635-2009.
- Multi-Functional Integration, Cost-Effective: In addition to being an ultimate safety device, this valve can also be used as an inlet and outlet for tank inspection and maintenance, serving multiple purposes and saving additional openings and costs.
Typical Applications
- Large petroleum and chemical storage tanks that need to cope with both fire overpressure and emergency vacuum pumping risks.
- Atmospheric dome-roof tanks, especially those equipped with nitrogen sealing systems.
- Process tanks in the chemical and pharmaceutical industries where violent exothermic reactions or rapid condensation may occur.
- Occasions where the capacity of standard breather valves is insufficient and the working conditions have both extreme positive pressure and vacuum risks.
Our Commitment
Hubei Wan'an Environmental Protection & Petrochemical Equipment Co., Ltd. is a professional manufacturer of storage tank safety equipment, with profound technical accumulation and a strict quality management system. We ensure that each Pressure/Vacuum Emergency Relief Valve undergoes the most rigorous factory inspection and has reliable performance.
We provide:
- Professional engineering selection: Provide accurate model recommendations based on your tank specifications, medium, protection scenarios and required emergency discharge/intake capacity.
- Customized production: Manufacture according to your specified materials, flange standards, special pressure/vacuum settings and certification requirements.
- Complete technical delivery: Provide detailed product manuals, certified discharge curves, installation guides and factory test reports.
- Reliable global supply: Products are packaged with sturdy export-standard packaging to ensure safe and intact delivery to project sites around the world.
Prepare the most reliable outlet for dual extreme risks. Choose Wan'an Pressure/Vacuum Emergency Relief Valve to provide ultimate positive and negative pressure safety protection for your most critical assets with proven dual protection performance and reliability.
Welcome to contact us for detailed technical parameters, certified discharge curves and project-specific quotations!
