Ball valves, as common control components in industrial piping systems, are mainly divided into two categories based on their internal structure: full-bore ball valves and reduced-bore ball valves. These two types of ball valves differ significantly in function, structure, and application scenarios. This article will discuss the differences between full-bore and reduced-bore ball valves in detail from the aspects of definition, structural characteristics, function, and application.
GNEE Group, as a professional valve manufacturer in China, provides valve selection advice and customization services. Reduce Leaks & Costs – Order Valves Directly Here!
Definitions and Structural Characteristics
Full-bore Ball Valve: As the name suggests, a full-bore ball valve has a flow channel designed with a uniform width, meaning the orifice size from the inlet to the outlet is the same. Its dimensions cannot be smaller than the standard specified value and are usually equivalent to the nominal diameter of that specification. For example, the flow channel diameter of a DN50 full-bore ball valve should also be approximately 50mm. This design ensures that the fluid does not encounter significant obstruction when passing through the valve, thus guaranteeing smooth fluid flow.
Reduced-bore Ball Valve: A reduced-bore ball valve is different. Its flow channel inlet is wider than the flow channel diameter, and the actual flow channel diameter is approximately one size smaller than the standard specification. Taking a DN50 reduced-bore ball valve as an example, its flow channel diameter is approximately 38mm, roughly equivalent to a DN40 specification. This design allows the flow rate to be controlled by adjusting the opening area when the valve's closing element (usually the ball) is partially closed, achieving a throttling or flow-blocking effect.
Functions and Applications
Full-bore ball valves: Due to their flow channel design, full-bore ball valves have low fluid resistance and excellent flow characteristics, making them primarily used in applications requiring large flow rates and unobstructed flow. For example, in pipeline systems requiring rapid on/off or circuit breaking, full-bore ball valves can quickly shut off the fluid while ensuring smooth flow when open. Furthermore, full-bore ball valves are suitable for high-viscosity, particulate, or easily crystallizing fluid media, as these media are less prone to clogging when passing through the valve.
Reduced-bore ball valves: Reduced-bore ball valves are mainly used in applications requiring flow regulation or throttling control. By adjusting the valve opening, the fluid flow rate can be precisely controlled to meet different process requirements. For example, in industries such as chemical, petroleum, and natural gas, reduced-bore ball valves are often used to regulate the flow rate and pressure of media, ensuring the stability and safety of the production process. In addition, due to the throttling effect of reduced-bore ball valves, they can also reduce fluid impact and noise to a certain extent, improving the operating efficiency of the pipeline system.
Differences between Full-bore and Reduced-bore Ball Valves
1. Different Applications
Full-bore ball valves are suitable for conveying large flow rates of media, such as in pipelines in the chemical, petroleum, and natural gas industries. Reduced-bore ball valves are suitable for smaller flow rates and applications in relatively confined spaces, such as in pharmaceuticals, food, beverage, and medical equipment.
2. Different Structures
Full-bore ball valves have a ball diameter the same as the pipeline diameter, resulting in a larger overall size. They mainly consist of the valve body, valve cover, valve stem, ball, sealing ring, and operating mechanism, offering better sealing performance. Reduced-bore ball valves, on the other hand, have a ball diameter smaller than the pipeline diameter, resulting in a smaller and more compact size. They mainly consist of the valve body, ball, sealing ring, and operating mechanism, offering a more compact structure and better sealing performance.
3. Different Prices
Due to the larger flow rate and more complex structure of full-bore ball valves during design and manufacturing, their cost is relatively higher. Reduced-bore ball valves, however, are smaller in size, have a simpler structure, and relatively lower production costs.
full bore ball valve and Reduced-bore Ball Valves factory
