High-Performance Eccentric Butterfly Valves: An Overview of DI and CI Butterfly Valves

Dec 7, 2023 | News

High performance eccentric butterfly valve, including DI butterfly valves and CI butterfly valves, offer reliable and efficient flow control solutions in industrial applications. Their unique design features, such as offset disc placement, low torque requirement, and pressure drop reduction, contribute to their superior performance. DI butterfly valves, made from ductile iron, provide robustness, corrosion resistance, and versatility, making them suitable for various industries. CI butterfly valves, constructed from cast iron, offer durability and a wide range of sizes, catering to different flow requirements.

Eccentric Butterfly Valves: An Overview

di butterfly valve

Eccentric butterfly valves are quarter-turn valves that utilize a disc with an offset shaft to control fluid flow. This design ensures that the disc is fully disengaged from the flow path when the valve is open, reducing turbulence and pressure drop. Here are some key features of high-performance eccentric butterfly valves:

a) Sealing Capability: Eccentric butterfly valves provide excellent sealing performance due to the eccentric disc design. The disc is positioned off-center, allowing a bubble-tight seal against the valve seat when closed, minimizing leakage.

b) Low Torque Requirement: The eccentric disc design reduces the torque required to operate the valve. This results in easier and more efficient valve actuation, reducing operational costs and enhancing system performance.

c) Pressure Drop Reduction: High-performance eccentric butterfly valves are designed to minimize pressure drop when fully open, ensuring efficient flow with minimal energy loss.

DI (Ductile Iron) Butterfly Valves: Features and Applications

DI butterfly valves are constructed using ductile iron, a type of cast iron that offers enhanced strength, durability, and corrosion resistance. Here are some notable features and applications of DI butterfly valve:

a) Robust Construction: Ductile iron provides exceptional mechanical strength, allowing DI butterfly valves to withstand high pressures and demanding industrial environments. They are resistant to impact, vibration, and thermal stress.

b) Corrosion Resistance: DI butterfly valves have excellent corrosion resistance, making them suitable for various applications involving corrosive fluids. They find applications in water treatment, wastewater management, chemical processing, and HVAC systems.

c) Versatility: DI butterfly valves are available in various sizes and pressure ratings, allowing for flexibility in system design and installation. They can be used for both on-off and throttling applications.

d) Cost-Effective Solution: DI butterfly valves offer a cost-effective solution for flow control, combining durability and high performance at a competitive price point.

CI (Cast Iron) Butterfly Valves: Features and Applications

CI butterfly valves are constructed using cast iron, a material known for its strength and durability. Here are some key features and applications of CI butterfly valve:

a) Sturdy Construction: Cast iron provides robustness and longevity to CI butterfly valves, enabling them to withstand high pressures and harsh operating conditions. They are suitable for applications involving water, air, gases, and non-corrosive fluids.

b) Wide Range of Sizes: CI butterfly valves are available in a wide range of sizes, allowing for compatibility with various pipe diameters and flow rates. This versatility makes them suitable for diverse industrial applications.

c) Fire Protection Systems: CI butterfly valves are commonly used in fire protection systems, where they serve as control valves to regulate water flow. They play a crucial role in ensuring the effectiveness and reliability of fire suppression systems.

d) HVAC Systems: CI butterfly valves find extensive use in heating, ventilation, and air conditioning (HVAC) systems. They offer efficient flow control for chilled water, hot water, and other HVAC fluids.