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U Section Butterfly Valve

The obvious difference between U-shaped butterfly valves and long structure double flange butterfly valves is the structural length, which is relatively shorter. Its structural length is the same as that of ordinary clamp and protrusion valves. There are significant differences in pressure and installation methods between U-shaped butterfly valves and long structured flanges.

Structural Features

  • Valve Body Design

The body of the U section butterfly valve is typically made from robust materials such as ductile iron, stainless steel, or carbon steel. This construction ensures high strength and durability, allowing the valve to withstand high pressures and harsh operating conditions. The U-shaped design of the body provides added structural integrity, making it suitable for both high-temperature and high-pressure environments.

  • Disc and Shaft Assembly

The disc is a crucial part of the butterfly valve, responsible for regulating the flow of fluid. In U section butterfly valves, the disc is often made from corrosion-resistant materials like stainless steel or nickel alloys. The disc is mounted on a shaft that allows it to rotate 90 degrees to open or close the valve. The U section design ensures a tight seal when the valve is closed, minimizing leakage and ensuring efficient flow control.

  • Seat Design

The seat in a U section butterfly valve is designed to provide a tight seal against the disc. It is usually made from resilient materials such as EPDM, NBR, or PTFE, which offer excellent resistance to wear and chemical attack. The seat is often replaceable, allowing for easy maintenance and extended valve life. The U section design helps to evenly distribute pressure across the seat, enhancing the sealing performance and reducing wear.

  • Stem and Bearing Construction

The stem of the butterfly valve is connected to the actuator, which controls the opening and closing of the valve. In U section butterfly valves, the stem is designed to withstand high torque and provide reliable operation. Bearings are used to support the stem and reduce friction during operation. These bearings are typically made from materials with high wear resistance, ensuring smooth and long-lasting performance.

  • Actuation Mechanism

U section butterfly valves can be operated manually, pneumatically, or electrically, depending on the application requirements. The actuation mechanism is designed to provide precise control over the valve position, allowing for accurate flow regulation. Manual actuators often include a handwheel or lever, while pneumatic and electric actuators offer automated control for more complex systems.

  • Flow Dynamics and Efficiency

The U section design of the butterfly valve ensures minimal flow resistance when the valve is fully open. The streamlined shape of the disc and the smooth interior of the valve body contribute to efficient flow dynamics, reducing pressure drop and energy consumption. This design makes U section butterfly valves ideal for applications where maintaining high flow efficiency is critical.

  • Installation and Maintenance

U section butterfly valves are designed for easy installation and maintenance. The compact and lightweight design allows for straightforward integration into piping systems, even in tight spaces. The valves can be installed between flanges using standard bolts, and the U section design facilitates quick and easy access for maintenance and inspection. Additionally, the replaceable seat and durable construction reduce downtime and maintenance costs.

Applications

  • HVAC Systems: Widely used in heating, ventilation, and air conditioning systems for precise flow control.
  • Food and Beverage Industry: Suitable for applications where hygienic and precise flow control is required
  • Pharmaceutical Manufacturing: Ensures precise flow control and minimal contamination, essential for pharmaceutical production.

Dimension

SIZE DN Φ D Φ D1 b (mm) L N-Φ d C Φ G
in mm A-series B-series A-series B-series A-series B-series (mm) A-series B-series
2 50 150 120.7 17.5 43 4 – Φ 19 F05 9 X 9
2 1/2 65 180 139.7 20.7 46 4 – Φ 19 F05 9 X 9
3 80 190 152.4 22.3 46 4 – Φ 19 F05 9 X 9
4 100 230 190.5 22.3 52 8 – Φ 19 F07 11 X 11
5 125 255 215.9 22.3 56 8 – Φ 22 F07 14 X 14
6 150 280 241.3 23.9 56 8 – Φ 22 F07 14 X 14
8 200 345 298.5 27 60 8 – Φ 22 F10 17 X 17
10 250 405 362 28.6 68 12 – Φ 25 F10 22 X 22
12 300 485 431.8 30.2 78 12 – Φ 25 F10 22 X 22
14 350 535 476.3 35.4 78 12 – Φ 29 F10 22 X 22
16 400 595 539.8 37 102 16 – Φ 29 F14
18 450 635 577.9 40.1 114 16 – Φ 32 F14
20 500 700 635 43.3 127 20 – Φ 32 F14
24 600 815 749.3 48.1 154 20 – Φ 35 F16
28 700 925 835 863.6 795.3 69.9 44.5 165 28 – Φ 35 40 – Φ 22 F25
32 800 1060 940 977.9 900.1 79.4 46 190 28- Φ 41 48 – Φ 22 F25
36 900 1170 1055 1085.8 1009.6 88.9 52.5 203 32 – Φ 41 44 – Φ 25 F25
40 1000 1290 1175 1200.2 1120.8 88.9 56 216 36 – Φ 41 44 – Φ 29 F25
48 1200 1510 1390 1422.4 1335.1 106.4 65.5 254 44 – Φ 41 44 – Φ 32 F30

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Conclusion

U section butterfly valves are valued for their ability to provide precise flow control while maintaining minimal pressure drop. Their unique design and reliable sealing make them suitable for a wide range of applications, particularly where flow precision and structural integrity are paramount.