High-performance Isolation Valves For Efficient Flow Control
Butterfly valves for heat exchangers and hvac systems offer precise flow control and shut-off with low pressure drop, ideal for water, air, and steam applications. featuring resilient seats and high-performance designs, they ensure corrosion resistance and reliable boiler pipeline protection in demanding environments.
Butterfly Valve is a high-performance flow control device designed for efficient regulation and shut-off in industrial piping and HVAC systems. Compliant with standards like API 609, ASME B16.34, and EN 593, these industrial butterfly valves are constructed from materials such as ductile iron, stainless steel (AISI 316/304), or carbon steel, offering excellent corrosion resistant butterfly valve properties. Widely used in water treatment, HVAC, chemical processing, and oil and gas applications, they provide reliable pipeline flow control under pressures up to 300 PSI and temperatures ranging from -29°C to 200°C, ensuring versatility and durability in diverse environments.
Manufactured through precision casting or forging, the butterfly valve features a disc that rotates 90° to control flow, offering low-pressure drop and quick operation. Available in sizes from 2" to 72" (DN50 to DN1800), they support wafer, lug, or flanged connections, with resilient seated or high-performance designs. Resilient seated valves use EPDM, NBR, or PTFE seals for leak-free performance, while high-performance models with metal seats handle higher temperatures and pressures. Surface treatments like epoxy coating or nickel plating enhance corrosion resistance, making them suitable for water, air, steam, and mildly corrosive media in resilient seated butterfly valve applications.
Butterfly Valves undergo rigorous testing, including hydrostatic, leakage, and cycle tests, to comply with API 598 and EN 12266 standards. With a minimum tensile strength of 485 MPa and yield strength of 275 MPa for ductile iron, these valves ensure durability in demanding conditions. Their quarter-turn operation enables rapid flow control, while the streamlined disc design minimizes turbulence and pressure loss, making them ideal for HVAC and water distribution systems. Features like ISO 5211 mounting pads, anti-static devices, and lockable handles enhance operational safety and compatibility with pneumatic or electric actuators.
Compared to gate or ball valves, the butterfly valve offers a compact, lightweight design with lower installation and maintenance costs, making it ideal for large-diameter pipelines. Certified by API 609 for performance and WRAS for potable water, these valves support manual, gear-operated, or automated actuation for versatile control. Their bidirectional sealing capability ensures reliable performance in both flow directions, while specialized options, such as triple offset or cryogenic designs, cater to niche applications like chemical processing or LNG systems. The valves’ robust construction resists wear and corrosion, extending service life in harsh environments.
Addressing challenges like corrosion, leaks, and flow inefficiencies, Butterfly Valves deliver reliable, cost-effective solutions for industrial piping systems. Their corrosion-resistant materials, efficient design, and easy operation make them a preferred choice for engineers seeking durable high-performance butterfly valves. Backed by Sunny Steel’s white-glove service, these valves ensure exceptional performance, safety, and longevity in water treatment, HVAC, and chemical applications.
A ball valve consists of several critical components that work together to ensure durability, tight sealing, and precise flow control.
The main housing that supports all parts, providing strength and structural stability.
A perforated sphere that regulates flow by rotating with the stem.
Connects the ball to the actuator or handle, transferring torque for operation.
Protects and seals the stem area with packing or O-rings to prevent leakage.
Non-metallic inserts like PTFE or Nylon ensure leak-tight sealing and smooth operation.
Provides manual or automated operation. Larger valves may use gearboxes for torque reduction.
Butterfly valves offer several advantages over other valve types, especially for sizes above DN 200 (200 mm).
Compact design with smaller face-to-face dimensions reduces installation footprint and lowers costs for labor, equipment, and piping support.
Simple design with few moving parts minimizes wear points and significantly reduces maintenance requirements.
90° handle rotation allows quick opening/closing. Larger valves may use gearboxes to reduce torque and simplify operation.
Fewer materials and simpler manufacturing make butterfly valves a cost-effective option, especially for sizes above DN 300.
Suitable for a wide range of applications, including underground installations, making them highly versatile.
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| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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