Bellows Seal ValvePacked valves require two different seals: a 360°seal on the stem and a 360° seal on the stuffingbox. The Conval Bellows Seal Valve removes thesetwo leak paths.Conval Bellows Seal Valves are used when packedvalves may not reliably contain light gases orhazardous system fluids. The multi-ply Inconel™static bellows stem seal is more reliable in mostapplications than sliding stem seals.Conval Bellows Seal Valves have a secondarygraphite packing and a pressure actuated backseatto contain system fluids in the unlikely event of aBellows rupture.