Double Block and Bleed
Trunnion-mounted ball valves utilise a mechanism featuring a stationary ball and floating seat rings that move along the valve axis. This design effectively handles the side load induced by pressure acting on the ball, with bearings absorbing this force. When operating at low pressure, the seats are sealed through the spring action of the seat rings. As pressure increases, the seats are pressed more firmly against the ball, enhancing the seal.
Regarding the Double Block and Bleed configuration, Starline valves come as standard in this setup, where both seats independently withstand pressure regardless of body cavity pressure. Additionally, options such as Block and Bleed execution and Double Piston Effect execution are available, offering versatility in valve functionality. This design ensures robust performance and enhanced safety in various industrial applications.
Benefits on this configuration include:
- Enhanced Safety - Double block and bleed configuration provides an additional layer of safety by offering two separate sealing mechanisms, reducing the risk of leaks and ensuring better containment of hazardous fluids.
- Simplified Maintenance - With independent block and bleed capabilities, maintenance and inspection procedures become more straightforward.
- Cost Savings - By eliminating the need for multiple valves and fittings to achieve the same level of isolation, the double block and bleed configuration can result in cost savings.
- Space Efficiency - Consolidating multiple functions into a single valve assembly saves space in the pipeline layout, making it ideal for installations where space is limited.
- Flexibility - The versatility of the double block and bleed configuration allows for various applications, including isolation, venting, and draining operations, making it adaptable to a wide range of process requirements and scenarios
