A. What are fabricated butterfly valves?

Fabricated butterfly valves are a type of butterfly valve constructed by welding together separate pieces of metal, typically steel plates. This differs from cast iron butterfly valves, which are formed by pouring molten metal into a mold.

B. What are the advantages of fabricated butterfly valves?

- **Lighter and stronger construction:** Fabrication allows for lighter weight designs compared to cast iron valves, while still maintaining high pressure ratings.exclamation

- **Lower torque:** The lighter weight translates to lower torque required for operation, making them easier to automate.exclamation

- **Assured sealing to atmosphere:** Fabricated valves can provide a more reliable seal against leaks to the surrounding environment.

- **Wider pressure and temperature range:** Fabrication allows for the use of different materials for the body and disc, enabling them to handle a broader range of pressures and temperatures.

C. What are the disadvantages of fabricated butterfly valves?

- **Generally higher cost:** Fabrication is a more complex process compared to casting, which can make them more expensive.

- **Longer lead times:** Custom designs or valves for high-pressure applications may require longer lead times for fabrication.

D. What are some applications for fabricated butterfly valves?

Fabricated butterfly valves are suitable for various industrial applications due to their high strength and ability to handle a wide range of pressures and temperatures. Here are some common uses:

- Chemical processing plants

- Water and wastewater treatment plants

- Marine applications

E. What are some things to consider when selecting a fabricated butterfly valve?

- **Pressure and temperature rating:** Choose a valve with a rating exceeding your application’s requirements.

- **Pipe size and flange type:** Ensure compatibility with your existing piping system.

- **Material selection:** Select appropriate materials for the body, disc, and seat based on the fluid being handled.

- **Actuation type:** Decide between manual, pneumatic, or electric actuation depending on your automation needs.

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Butterfly Valves

Fabricated Butterfly Valves

Large-diameter fabricated steel valves engineered for cooling water, flue gas, penstock and other big-bore applications.

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Overview

Fabricated butterfly valves are constructed from welded components, offering robust performance and durability in industrial applications. They feature a wide range of materials and configurations, providing versatility for various fluid control needs.

Key features

Robust Construction: Fabricated from welded components, ensuring strength and durability for rigorous industrial applications.
Versatile Materials: Available in carbon steel, stainless steel (304, 316, 316L), and alloy steel options to suit diverse operational requirements.
Multiple Disc and Seat Options: Discs and seats can be made from stainless steel, carbon steel, or lined with materials like EPDM, NBR, Viton, or PTFE for enhanced performance.
Wide Size Range: Typically ranging from 2 inches to 48 inches (DN 50 to DN 1200), accommodating various piping system sizes.
High Pressure and Temperature Capability: Designed to handle pressures up to ANSI Class 600 and temperatures from -20°C to 200°C (-4°F to 392°F), depending on configuration.
Various Connection Types: Offered in wafer, lug, and flanged connections, facilitating easy installation and integration into piping systems.
Actuation Flexibility: Compatible with manual (lever or gear), electric, pneumatic, or hydraulic actuators for remote operation and automation.
Customization Options: Can be customized for specific applications, including special coatings, materials, and configurations as per customer requirements.

Technical specifications

Size Range: Typically from 2 inches to 48 inches (DN 50 to DN 1200)
Body Materials: Carbon Steel,
Stainless Steel (304, 316, 316L),: Alloy Steel
Temperature Range: From -20°C to 200°C (-4°F to 392°F), depending on materials and configuration
Pressure Rating: ANSI Class 150, 300, 600
PN 10, PN 16, PN 25, PN 40: Connection Types
Wafer,: Lug,
Flanged: Actuation Options
Manual (lever or gear),: Electric actuator,
Pneumatic actuator,: Hydraulic actuator
Seat Materials: EPDM,
NBR (Nitrile Butadiene Rubber),: Viton,
PTFE: End Connections
ANSI B16.5 Flanged,: EN 1092-1 Flanged,
ASME B16.25 Butt Weld: Disc Materials
Stainless Steel,: Carbon Steel,
Alloy Steel: Design Standard
API 609,: ASME B16.34,
EN 593: Applications
Chemical processing,: Petrochemical industry,
Power generation,: Water treatment,

Benefits

Reliability and Durability: Fabricated butterfly valves offer robust performance and long service life in demanding industrial environments.
Versatility: Suitable for a wide range of industries, including chemical processing, petrochemicals, power generation, water treatment, and HVAC systems.
Cost-Effectiveness: Lower lifecycle costs due to minimal maintenance requirements and extended service intervals.
Efficient Fluid Control: Provide excellent flow control with low pressure drop and reliable sealing capabilities.
Safety and Compliance: Designed and manufactured according to international standards such as API 609, ASME B16.34, and EN 593, ensuring safety and reliability.
Adaptability to Harsh Conditions: Capable of withstanding corrosive fluids, high pressures, and extreme temperatures, maintaining operational integrity.
Ease of Installation and Maintenance: Easy to install and maintain, reducing downtime and operational disruptions.
Fabricated butterfly valves combine robust construction with versatility and reliability, making them a preferred choice for critical fluid control applications in diverse industrial settings.

Frequently asked questions

Application engineering

Specify your requirement.

Share your process conditions, required configuration and quantity. Our team will confirm suitable options and available documentation.