Views: 0 Author: Site Editor Publish Time: 2024-12-24 Origin: Site
• Floating Ball Design: Floating ball valves feature a ball that is not rigidly fixed to the stem. Instead, it floats within the valve body, allowing it to move slightly under pressure. This movement ensures that the ball remains in contact with the seat, providing a tight seal.
• Sealing Mechanism: The seal is achieved through the contact between the ball and the seat. The resilient seat material (often PTFE or other polymers) compresses against the ball, creating a tight seal. This design provides bidirectional sealing, ensuring reliable shutoff in both directions.
• Bidirectional Sealing: Floating ball valves are designed to provide bidirectional sealing, meaning they can effectively seal flow in both directions. This feature is particularly useful in applications where flow direction may change.
Design and Sealing Mechanism
• Wedge Gate Design: Wedge gate valves feature a wedge-shaped gate that moves linearly to control flow. The gate compresses against the seat to create a seal, providing tight shutoff when fully closed.
• Sealing Mechanism: The seal is achieved through the compression of the gate against the seat. This design provides unidirectional sealing, meaning it is most effective when flow is in one direction.
• Unidirectional Sealing: Wedge gate valves are designed for unidirectional sealing. While they can provide tight shutoff, their performance may vary depending on the direction of flow.
| Feature | Floating Ball Valves | Wedge Gate Valves |
| Sealing Type | Bidirectional | Unidirectional |
| Sealing Mechanism | Ball compresses against resilient seat | Wedge gate compresses against seat |
| Leakage Rate | Minimal leakage, suitable for high-pressure applications | Excellent tight shutoff, suitable for on-off control |
| Material | Stainless steel, carbon steel, alloy steels | Carbon steel, stainless steel, alloy steels |
| Testing | Hydrostatic and pneumatic tests | Hydrostatic and pneumatic tests |
| Applications | High-pressure pipelines, quick shutoff | Process plants, water treatment |
