Ball valve C81

pneumatically-operateddouble block-and-bleed2-piece

• 2-piece cast flanged valve • Double block & bleed • Blowout-proof robust stem design • Bi-directional as standard • API 6D certified (API monogram #6D-1278) • Fire safe designed to API 6FA, API 607, ISO 10497 • Comply with NACE MR0175/ISO 15156 • Corrosion resistant low friction bearings • Double Piston Effect or Single Piston Effect seat design • Mixed SPE and DPE seats design also available • Inconel springs, assist in low pressure sealing Special mechanical design and construction Solid one-piece high torque durable stem. Tight stem-to-ball directional engagement, ensures relief hole alignment. Strict materials and manufacturing tolerances control. Efficient heat transfer A narrow space between the extension ID and the stem OD allows the stem seal to remain at an ambient temperature. No-Trap Cavity Relief hole on the upstream sphere of the ball to prevent pressure buildup in the cavity. Single-side or self-pressure-relief sealing for bidirectional full pressure service. Flexible bonnet installation angle Up to 45° from the vertical axis for the 12” bonnet (per BS6364 guidelines). Up to 15° from the vertical axis for the 6” bonnet (not BS6364 compliant). Flow direction indicators (for valves with preferred flow direction) Highly visible arrows on body and bonnet top. “T” mark on the stem, showing relief hole direction. Double isolation / double block and bleed designs available upon request Clean assembly and packing