KSB ball valve

About KSB ball valve

• Quick Quarter-Turn Operation: Provides fast, efficient shut-off and on/off control.

• Excellent Sealing Capability: Offers tight, leak-proof closure, making them ideal for gas and fluid applications where positive shut-off is critical.

• Durability and Longevity: Constructed from robust materials like stainless steel, carbon steel, brass, bronze, or PVC, ensuring long service life in demanding environments.

• Versatile Applications: Suitable for a wide range of industries, including oil and gas, chemical processing, water treatment, HVAC, and more.

• Compact Design: Their relatively small footprint allows for installation in confined spaces.

• Low Maintenance: Generally require minimal maintenance due to their simple and robust design.

• Bi-directional Flow: Many designs allow flow in both directions, simplifying installation and reducing the need for multiple valve types.

Common Types and Configurations:

• Body Styles:

  • One-Piece: Economical, often considered "throwaway" valves due to difficulty in repair.

  • Two-Piece: Body sections bolted or threaded together, allowing for easier maintenance and seat replacement.

  • Three-Piece: Allows for the central body section containing the ball and seats to be removed from the pipeline without disturbing the end connections, facilitating in-line service and repair.

• Ball Designs:

  • Floating Ball: The most common type, where the ball is held in place by the compression of the seats, allowing it to "float" slightly and provide a tight seal.

  • Trunnion Mounted Ball: Ideal for larger sizes and higher pressures, the ball is mechanically anchored at the top and bottom, reducing operating torque and seat wear.

• Port Design:

  • Full Port (Full Bore): The bore (hole) through the ball is the same size as the pipeline, minimizing pressure drop and allowing for pigging.

  • Reduced Port (Reduced Bore): The bore is smaller than the pipeline, resulting in a slight pressure drop but offering a more compact and economical design.

  • V-Port: Features a V-shaped opening in the ball or seat, allowing for more precise flow control (throttling).

• End Connections:

  • Threaded (NPT, BSPT, BSPP): Common for smaller sizes.

  • Flanged (ASME B16.5): Used for larger sizes and higher pressures, providing a secure, bolted connection.

  • Socket Weld (SW): Permanent welded connection for high-pressure and high-temperature applications.

  • Butt Weld (BW): Permanent welded connection offering maximum strength and minimal leakage points.

• Operation:

  • Manual (Lever/Handle): Simple, cost-effective, and commonly used for general on/off applications.

  • Actuated (Pneumatic, Electric, Hydraulic): For automated control, remote operation, and high-cycle applications.

Available Options (depending on model):

• Fire-Safe Design: Features secondary metal seats to maintain a seal in case of soft seat burnout during a fire.

• Anti-Static Device: Ensures electrical continuity between the ball, stem, and body, preventing static charge build-up, especially important for flammable media.

• Blow-Out Proof Stem: Designed with a shoulder to prevent the stem from being ejected under pressure.

• Cavity Pressure Relief: Mechanisms to prevent pressure build-up in the body cavity, which can damage the valve.

• Extended Stem: For applications with high or low temperatures, or where the valve is in an insulated pipeline, to move the actuator away from the body.

• Seat Materials: PTFE, RPTFE, PEEK, Nylon, Devlon, Metal Seats (for high temperature/abrasive services).

• Body Materials: WCB, CF8M (SS316), A105, A182 F304/F316, Hastelloy, Monel, etc