High Pressure Ball Valves – Erreesse
High Pressure Ball Valves are suitable for topside or subsea installations with a restricted range of available constructions and materials. A careful selection is required in this case: carbon steel, stainless steel or other low alloys can be used, however duplex or high strength materials with good or excellent resilient properties should be used for ball, seat rings and stem, both for manual or actuated ball valves, in order to withstand pressure ratings and actuators maximum allowable stem torque (MAST), unless specified by the customer or when combined with other service conditions. Soft seated ball valves can be supplied with a thermoplastic seat insert with good wear resistance and low friction coefficient: Nylon, Devlon V and PEEK should be selected; elastomer seat inserts are also available upon request. Seals are mostly made by O-ring elastomers, FKM ED, HNBR ED and FFKM, anti-explosive decompression requirement is mandatory. Alternatively, PTFE lip seals can be used. High pressure ball valves can be manufactured according to API 6D, API 6DSS, ASME B16.34, ASME B31.3, ASME B31.4, ASME B31.8, section V, Section VIII Div. 1 and 2 Section IX, ISO 14313, ISO 17292, EN 1092-1 or equivalent standards.