Technical Information - Fig No. 665 Vacuum Relief Valve

The ROMA Fig-665 is a direct acting, spring-loaded vacuum relief valve designed to protect pipelines, vessels, and process equipment from damaging negative pressure conditions. The valve remains tightly closed under normal operating conditions and opens automatically when the preset vacuum level is reached, allowing air to enter the system and safely break the vacuum.
 

The Fig-665 provides a simple, reliable safeguard against negative pressure events, helping to protect infrastructure, minimise downtime, and extend asset life.

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