What are Butterfly Valves?

A butterfly valve is a quarter-turn rotary valve that regulates flow through a circular disc or vane positioned within the pipe. The disc is mounted on a spindle, and when the valve is fully open, the disc is rotated parallel to the flow direction, allowing for minimal resistance to the fluid. Conversely, when the valve is closed, the disc is rotated perpendicular to the flow, blocking it entirely.

Various Types of Butterfly Valves:

1. Concentric Butterfly Valve:

• The most common type.
• The center of the stem is centered within the valve disc, providing a symmetric flow pattern.
• Suitable for a wide range of applications due to simplicity and cost-effectiveness.

2. Eccentric Butterfly Valve:

• The stem is offset from the center of the valve disc.
• This design reduces friction during rotation, improving sealing capabilities and increasing durability.
• Often used in high-performance applications or where tight shut-off is required.

3. Double Offset Butterfly Valve:

• Combines an offset stem with an offset disc.
• Reduced friction during rotation, minimizing wear and tear.
• Ideal for applications requiring high-performance and reliability.

4. Triple Offset Butterfly Valve:

• Features an additional offset in the seat design.
• Virtually eliminates rubbing between the seat and disc, reducing wear and extending the valve's lifespan.
• Commonly used in critical applications such as high-pressure and high-temperature environments.

5. Wafer Butterfly Valve:

• Has a simple design, lightweight, and easy to install between flanges.
• Suitable for applications where space is limited, and the pressure drop is not a significant concern.

6. Lug Butterfly Valve:

• Similar to the wafer type but with additional threaded lugs for easy installation and removal.
• Provides more flexibility in system maintenance.

7. Flanged Butterfly Valve:

• Secured between pipe flanges, making it easy to install and remove.
• Suitable for applications where the valve will be regularly inspected or maintained.

8. High-Performance Butterfly Valve:

• Engineered for demanding applications where tight shut-off, high pressure, and temperature resistance are crucial.
• Often used in industries such as petrochemical, power generation, and chemical processing.

Applications:

• Pneumatic / Electrical HVAC:
• Used in heating, ventilation, and air conditioning systems for flow control.
• Water Supply & Sewage:
• Ideal for regulating water and wastewater flow in municipal and industrial settings.
• Food & Beverage:
• Commonly employed in the food industry for hygiene and process control.
• Chemical / Petrochemical / Processing:
• Used in chemical processing plants for handling various fluids.
• Power and Utilities:
• Suitable for controlling flow in power generation facilities.
• Paper and Pulp:
• Used in paper mills for controlling the flow of pulp and other fluids.
• Ship Building and Steam:
• Applied in marine applications and steam systems for flow regulation.

Butterfly valves are widely employed in various industries due to their versatility, ease of operation, and cost-effectiveness. The choice of the specific type depends on the application requirements, including pressure, temperature, flow rate, and the need for tight shut-off capabilities.

Brans Valves India Pvt. Ltd.: Unveiling Excellence in Butterfly Valves

Welcome to Brans Valves, where precision meets versatility in fluid control solutions. Our Butterfly Valves redefine industry standards, offering a comprehensive range of features tailored to meet the diverse needs of your applications.

Features of Butterfly Valves:
1. Quarter-Turn Operation:
Butterfly valves are known for their simple and quick quarter-turn operation.
The valve can be fully opened or closed with minimal effort, making it easy to control fluid flow.

2. Compact Design:
Butterfly valves have a compact and lightweight design compared to other types of valves.
Their small footprint makes them suitable for applications with limited space.

3. Low Pressure Drop:
When fully open, butterfly valves offer a straight flow path, resulting in minimal pressure drop across the valve.
This feature is advantageous for applications where maintaining fluid pressure is critical.

4. Rapid Opening and Closing:
Butterfly valves can be rapidly opened or closed, making them ideal for applications requiring quick response times.

5. Cost-Effective:
Butterfly valves are often more cost-effective than other types of valves, making them a popular choice for various industries.

6. Versatility in Applications:
Suitable for a wide range of applications, including water treatment, HVAC systems, chemical processing, oil and gas, and more.

7. Material Options:
Butterfly valves are available in various materials, including carbon steel, stainless steel, alloys, and more, allowing them to be compatible with different fluids and environmental conditions.

8. Bubble-Tight Seal:
Butterfly valves can provide a bubble-tight seal when closed, ensuring that the fluid is completely shut off.

9. Wide Size Range:
Available in a wide range of sizes, from small diameters (1 inch or less) to large diameters (up to 36 inches or more), catering to diverse applications.

10. Actuation Options:
Butterfly valves can be operated manually using a hand lever or gear, or they can be automated with actuators, including pneumatic, hydraulic, or electric actuators.

11. Resilient Seating:
Many butterfly valves feature resilient seats made of materials like EPDM or Nitrile, providing effective sealing even in low-pressure applications.

12. Optional Special Features:
Butterfly valves are designed with special features, such as fire-safe design, high-performance characteristics (double or triple offset), and compliance with industry standards like API, ANSI, and BS.

Brans Valves’ Butterfly Valve Range:

• Size Range: 1"-36" (15NB 900NB)
• Pressure Class: 150#-600# | PN10, PN16, PN25, PN40
• Material of Construction: CS / SS / Alloys / Monel / Hastalloys / Bronze
• Actuation Options: Hand Lever / Gear Box / Pneumatic / Hydraulic / Electrical
• End Connection Types: Wafer Type / Lug Type / Flange Ends
• Seat Materials: EPDM / Nitrile / PTFE / Rubber Lined & Seated
• Seating Configuration: Metal to Metal and Metal to Soft Seat

Compliance & Specifications:

• Design Standards: API 609, ANSI B16.34, BS 5155
• Face to Face Standards: API 609, BS 5155, ANSI B16.10
• End to End Configurations: Wafer, Lugged, Flanged
• Testing Standards: API 598, BS 5155
• Fire Safe: API 607
• Special Certification: NACE MR-01-75 / 0103
• Mounting Flange: ISO5211

Special Configurations:
Double Offset
Triple Offset

Brans Butterfly Valves are engineered to deliver optimal performance and reliability across a spectrum of industries, ensuring efficient fluid control in diverse applications.

Elevate Your Operations with Brans Butterfly Valves!

Explore the future of fluid control with Brans Valves India Pvt. Ltd. Our Butterfly Valves stand as a testament to precision engineering and unmatched versatility. For inquiries, quotations, and customized solutions, contact us today.