Image HAV-Series Air Relief Check Valve Markets Food & Beverage / Pharmaceutical Product Options Part Number Size Seal Material HAV3EA150 1-1/2" EPDM 304 Stainless Steel HAVNEA150 1-1/2" EPDM 304 Stainless Steel HAV3EA200 2" EPDM 304 Stainless Steel HAVNEA200 2" EPDM 304 Stainless Steel