Pressure Vacuum Relief Valve (PVRV)
Pressure vacuum relief valves (PVRVs) are critical safety devices used in atmospheric storage tanks containing fuel, chemical, and petrochemical products.
They maintain internal tank pressure balance and protect the tank from deformation, leakage, or explosion risks caused by excessive pressure increase or vacuum conditions.
Operating Principle
A PVRV provides two-way protection:
Pressure Mode:
When internal tank pressure exceeds the preset limit, the valve opens and safely vents excess pressure.
Vacuum Mode:
When internal pressure drops below ambient pressure, the valve automatically admits air to restore equilibrium.
Through this dual-action protection, the structural integrity of the tank is preserved, vapor losses are reduced, and process safety is ensured.
Edopec Engineering Approach
Edopec determines the most appropriate PVRV type for each project by considering tank volume, stored product characteristics, process temperature, and environmental conditions.
All solutions are designed in full compliance with international safety and environmental standards.
Our solutions include:
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Pressure/vacuum relief valves for tank ventilation systems
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Models integrated with flame arresters
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Products compliant with API 2000, ISO 28300, and EN 12874
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Material options: stainless steel, carbon steel, aluminum, and special alloys
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Performance testing, certification, and commissioning services
Advantages of Pressure Vacuum Relief Valves
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Protection against tank explosion and collapse
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Reduction of vapor losses and emissions
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Enhanced energy efficiency and environmental safety
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Long service life with low maintenance requirements
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Compatibility with flame arrester–integrated safety systems
Safe Storage with Edopec Assurance
Edopec manages engineering calculations, procurement, and implementation of PVRV systems under a single integrated process to ensure continuous safety in tank farms and refinery facilities.
Every valve is delivered with complete documentation, full traceability, and compliance with applicable standards.
Edopec – Where safety, efficiency, and engineering excellence meet.
