Constructed of nonmetallic, corrosion-resistant materials, relief valves have all-polymer internal construction and can be used in highly caustic environments not suitable for metal and fiberglass. Polymer valves operate in a similar fashion to their metal and fiberglass counterparts. They protect low-pressure atmospheric storage tanks from excessive pressure and/or vacuum and limit fugitive emissions by preventing constant tank breathing to atmosphere. They are available in vent-to-atmosphere or pipe-away configurations.
Continental Disc Corp., (816)