Pressure and Vacuum Relief Valves (PVRV's)
Pressure and Vacuum Relief Valves (PVRV’s) are tank protection devices predominantly installed on a nozzle opening at the top of a fixed roof, low pressure (15 psig and lower) storage tank. Designed and applied per API standard 2000, their primary job is to safely protect your tank against rupture / implosion by letting the tank breathe, or vent, when pressure changes in the tank during standard operating conditions. PVRV’s are only used in vapor service and should never be used for liquid relief scenarios.
Emergency Relief Valves
Emergency Relief Valves protect tanks against excessive pressure caused by external event outside normal operating procedures such as heat / fire exposure / flashes within the tank. Emergency relief valves provide higher flow capacity than standard pressure and vacuum relief valves. This allows them to release pressure / vacuum rapidly to overcome the rapidly increasing pressures due to heat expansion.
Why Pressure/ Vacuum Relief Valves Are Essential:
- Save money by saving product
- Generally required by OSHA, EPA, etc.
- Minimizes evaporation emissions and EPA concerns
- Reduces atmospheric corrosion of tank – highly important in port side facilities or those in highly corrosive environments
- Protects tank from over or under pressurization when sized properly
Cross Company is proud to offer pressure and vacuum relieve valves from Groth Corporation. We are also proud partners with ARI-Armaturen, who offer a full range of safety relief valves, steam traps and process valves.
Are you interested in learning more about pressure relief valves and vents can help your operation? Contact us today to discuss your project or application with a Cross team member.