Classification of Big Size Ball Valves: Types and Features

Classification of Big Size Ball Valves: Types, Features, and Applications

Large-diameter ball valves, also known as big size ball valves, are specialized valves designed for long-distance pipeline systems. These valves are critical for controlling high-pressure, large-flow fluid systems, typically installed at pipeline endpoints to regulate or shut off fluid flow. With diameters exceeding 2 inches, they are classified as follows:

Classification of Ball Valves by Size

1. Small-Diameter Ball Valves: Nominal diameter ≤ 1 1/2 Inch (40 mm).

2. Medium-Diameter Ball Valves: Nominal diameter 2 Inch – 12 Inch (50-300 mm).

3. Big Size Ball Valves: Nominal diameter 14 Inch – 48 Inch (350-1200 mm).

4. Extra-Large Ball Valves: Nominal diameter ≥ 56 Inch (1400 mm).

This classification ensures optimal valve selection for diverse pipeline requirements.

Key Notes:

- Floating vs. Trunnion Mounted Ball Valves: While ball valves are categorized into floating and fixed types, big size ball valves universally use a trunnion mounted ball valve design for enhanced stability.

- Drive Mechanisms: Trunnion mounted ball valves often integrate ball valve gear boxes, ball valve pneumatic actuators, or ball valve electric actuators for automation and torque management.

Structural Features of Big Size Ball Valves

Big size ball valves are engineered for durability and precision. Key components include:

- Valve Body: Houses the ball and ensures seamless fluid flow.

- Ball Valve Ball: A trunnion mounted ball design minimizes wear and ensures reliable sealing.

- Dual-Seat Seal: Enhances sealing reliability with a two-stage structure.

- Stem and Actuator Compatibility: Supports integration with ball valve pneumatic actuators or ball valve electric actuators for remote control.

- Pressure Balancing: Reduces operational torque, simplifying valve operation.

Technical parameters of big size ball valves

- Valve Material: Carbon Steel (WCB, A105, LCB, LF2, WC6, F11, WC9, F51),

                            Stainless Steel (CF8, F304, CF8M, 316, CF3, F304L, CF3M, CF316L)

                            Duplex Stainless Steel (4A, 5A, 6A), Aluminium Bronze, Monel, and other special alloy materials.

- Valve size range: 14 Inch – 48 Inch (350-1200 mm)..

- Connection form: There are two connection methods: flange and clamp.

- Pressure environment: pn10, pn16, pn25, etc.

- Applicable media: suitable for water, steam, suspension, oil, gas, weak acid and alkali media, etc.

- Temperature range: low temperature is -29℃ to 150℃, normal temperature is -29℃ to 250℃, high temperature is -29℃ to 350℃.

Advantages of Big Size Ball Valves

1. Low Fluid Resistance: Matches pipeline diameter to minimize energy loss.

2. Robust Sealing: Utilizes advanced polymers for leak-proof performance, ideal for vacuum systems.

3. Easy Operation: 90° rotation enables quick open/close cycles, compatible with automation.

4. Longevity: Replaceable sealing rings extend service life.

Applications of Big Size Ball Valves

Big size ball valves are indispensable in:

- Oil & Gas: Pipeline trunk lines and distribution networks.

- Water Treatment: High-flow municipal systems.

- Power Plants: Cooling and steam management.

- Chemical Processing: Corrosive fluid control.

Installation & Maintenance Tips

1. Installation: Ensure pipeline alignment, parallel flanges, and debris-free interiors.

2. Maintenance:

– Regularly inspect seals and actuators (e.g., ball valve gear box, pneumatic/electric systems).

– Replace worn seals promptly.

– Clean valve internals using non-abrasive methods.

Why Choose a China Ball Valve Manufacturer

As a leading ball valve manufacturer, China offers advanced engineering, cost-effective solutions, and ISO-certified production. Our trunnion mounted ball valves and actuator-compatible designs meet global standards for reliability and performance.