Features Of Lined Ball Valve

1. Valve Open/Closed Position Indicator: The ball, stem, and handle of a Lined Ball Valve are assembled as a single unit. The stem head features a flattened design, making it easy to determine whether the valve is in the open or closed position by the position of the handle. When the flattened handle or stem head is parallel to the pipeline, the valve is in the fully open position; when the flattened handle or stem head is perpendicular to the pipeline, the valve is in the fully closed position.

2. Locking Device: To prevent malfunction and unintended switching due to unpredictable line vibration, locking holes are provided in the fully open and fully closed positions of the valve. The valve can be locked with a padlock. This locking device is particularly advantageous for valves installed outdoors, in production lines for petroleum and chemicals containing flammable media, or in process flow where opening or closing the valve is prohibited. This prevents accidental valve operation by others.

3. Stem Anti-Flyaway Mechanism: When media passes through the valve, pressure in the valve body cavity can push the stem out. To prevent this, a flyout prevention structure is installed at the bottom of the stem. Even if the packing or thrust bearing burns or is damaged by other factors during a fire, the media pressure within the valve body will force the valve stem flange into close contact with the sealing surface on the valve body, preventing significant leakage from the damaged packing.

4. Anti-static Device and Fireproof Structure: Soft-seat ball valves are designed with an anti-static device and fireproof structure. In the event of a fire, if the valve seat burns, the ball will directly contact the metal surface of the valve body, preventing significant leakage from the burned seat.

5. Unique Seat Sealing Structure: A dual-line seal, designed by combining years of ball valve manufacturing experience with advanced international technology, naturally relieves pressure from the valve seat, ensuring a complete seal under long-term, low-pressure, and vacuum conditions.

6. Full-Bore or Reduced-Bore: The flow aperture of a floating ball valve matches the pipeline ID. Reduced-Bore design is available upon request to facilitate pipeline cleaning.