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Ball Valves

Ball valves are quarter-turn valves that use a pivoting, perforated ball to control fluid flow, offering quick and reliable shut-off with minimal pressure drop.

Available in floating and trunnion-mounted designs, ball valves are widely used in industries such as oil and gas, petrochemical, and water treatment for their durability and ease of operation.

Ball Valves

Ball valves operate by rotating a hollow, perforated ball 90 degrees to align or misalign the ball's hole with the flow path, enabling efficient on-off control. Floating ball valves, designed to BS5351, are ideal for smaller sizes, while trunnion-mounted valves, per API 6D, support larger, high-pressure applications. Their compact design, low maintenance, and ability to handle various fluids make them a preferred choice in critical industrial systems.

Key Properties of Ball Valves

  • Quarter-Turn Operation: Enables quick and easy on-off control.
  • Low Pressure Drop: Minimal flow resistance when fully open.
  • Versatile Design: Available in floating and trunnion-mounted configurations.
  • Connection Options: Supports RF, RTJ, flanged, and welded ends.

Common Standards and Materials

Ball valves are manufactured to meet stringent industry standards, ensuring reliability and compatibility in various systems.

Type/Standard Material Application
Floating Ball: BS5351 4130, 410, A487 4C, CA15, CF8M Oil and gas, water treatment
Trunnion Mounted: API 6D Duplex, Super Duplex, Inconel High-pressure, large-diameter systems

Applications of Ball Valves

Ball valves are critical in industries requiring efficient and reliable flow control:

  • Oil and Gas: Used in pipelines, refineries, and offshore platforms.
  • Petrochemical: Handles aggressive chemicals in processing plants.
  • Water Treatment: Controls flow in distribution and treatment systems.
  • Power Generation: Manages steam and water flow in power plants.

Specifications

Properties Values & Limits
Material 4130, 410, A487 4C, CA15, CF8M, Duplex, Super Duplex, Inconel
Design Standards API 6A, ASME VIII, API 6FA, API 6D, BS5351
Connection RF, RTJ, Flanged, Welded
Size Range 1/2" to 2" (Floating, ANSI 1500); 3" to 12" (Floating, ANSI 600); 2" to 56" (Trunnion, ANSI 1500); 2 1/16" to 4 1/16" (API 6A)
Pressure Rating Up to ANSI Class 1500 lbs; 2000–10,000 PSI (API 6A)
Face to Face API 6D, ASME B16.10
Testing Standards API 6A, ISO 5208
Flange Details ASME B16.5, API 6A
Product Spec Level PSL 1, 2, 3, 3G, 4
Trims API Class AA to HH, TCC Coated Seats

Considerations for Use

  • Operation Type: Best for on-off applications, not ideal for precise throttling.
  • Material Compatibility: Select materials to match fluid and environment to prevent corrosion.
  • Size and Pressure: Choose floating or trunnion-mounted based on size and pressure requirements.