Flanged Stainless Steel ERV-100 Emergency Relief Valve, For Industrial, Certification : ISI Certified

Emergency relief vents(ERV) permit access to low pressure storage tanks and provide emergency venting capacity in the event of fire. They are used extensively on bulk storage tanks, including  floating roof tanks, low pressure gas pipeline systems, digesters, and gas holders.
For tank venting or examination, the entire hinged cover may be lifted open in a matter of seconds, offering clear passage through the unobstructed opening. Since no gasket replacement or unbolting is necessary, this vent eliminates the expensive manpower.