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Butterfly Valve

ON OFF

An ON OFF butterfly valve, also known simply as an ON/OFF valve or a shut-off butterfly valve, is a type of valve used to completely stop or allow the flow of fluid through a pipeline.
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Specifications

Butterfly Valve - Resilient Seated
Size Range

2 – 24 NPS, DN50 - DN600

Body Materials

Cast Iron, Ductile Iron

Temperature Range

-20°F to 250°F (-29°C to 121°C)

Stem Materials

Stainless Steel

Maximum Allowable Operating Pressure

Maximum 250 psi (17.2 Bar)

Seat Materials

EPDM, BUNA-N

Shutoff Rating

Bidirectional Bubble-tight

Disc Materials

Nylon 11 Coated Ductile Iron, Stainless Steel

Body Style

Wafer 3W, Lug 3L

Design Standard

API 609, Category A, EN 593, MSS SP-67

Flange Drilling

API 609, Category A, ASME B16.1 Class 125, ASME B16.5 Class 150, AS 2129 Table D & E, EN 1092 PN6, PN10, PN16, JIS 10K

Testing Standard

API 598, ISO 5208, EN 12266-1, MSS SP-61

Certifications

ABS Type Approval, CE/PED, CRN, FDA, ANSI/NSF 372, ANSI/NSF-61

Face To Face

API 609 Category A, EN 558 Series 20

Applications

Potable Water, Wastewater, Seawater, HVAC, Data Centers, Sugar & Ethanol

Features:

  1. Simple and Compact Design: Butterfly valves are relatively simple in construction, consisting of a disc that rotates on a shaft to control flow. This simplicity makes them compact and lightweight compared to other valve types.

  2. Quick Operation: They are designed for quick operation, allowing for fast opening and closing. This feature is advantageous in applications where rapid flow control is necessary.

  3. Low Pressure Drop: Butterfly valves typically have a lower pressure drop compared to other valve types like gate valves. This means they cause less obstruction to flow when fully open.

  4. Cost-Effective: Due to their simple design and ease of manufacturing, butterfly valves are generally more cost-effective than other types of valves for large diameter applications.

  5. Versatility: Butterfly valves are versatile and can be used in a wide range of applications including water supply, HVAC systems, chemical processing, and food and beverage industries.

  6. Sealing Mechanism: They can achieve effective sealing with a variety of materials such as rubber, PTFE (Teflon), and metal, depending on the application requirements.

  7. Maintenance: Maintenance requirements are generally low, although periodic inspection and replacement of seals may be necessary depending on the application and operating conditions.

  8. Corrosion Resistance: They are available in materials that offer good resistance to corrosion, making them suitable for use in aggressive environments.

  9. Flow Control: While primarily on-off valves, some designs can also be used for throttling flow when needed, although they are less precise than dedicated control valves.

  10. Size Range: Butterfly valves are available in a wide range of sizes, from a few inches to several feet in diameter, allowing them to be used in both small-scale and large-scale applications.

Benefits:

  1. Cost-Effective: They are generally more affordable than other types of valves, especially in larger sizes, due to their simpler design and construction.

  2. Space-Saving Design: Their compact size and lightweight construction make them ideal for installations where space is limited or where weight considerations are important.

  3. Ease of Installation: Butterfly valves are relatively easy to install and maintain, reducing downtime during installation and servicing.

  4. Reliability: With fewer moving parts compared to other valve types, they generally offer reliable operation with minimal risk of failure.

  5. Reduced Maintenance: Due to their robust construction and simple design, butterfly valves typically require less maintenance compared to other valves. Routine inspections and occasional replacement of seals are usually sufficient to ensure continued operation.

  6. Environmental Benefits: Efficient flow control and minimal leakage contribute to environmental sustainability by reducing waste and conserving resources.

on-off butterfly valves are valued for their cost-effectiveness, reliability, versatility, and efficiency in various industrial and commercial applications where reliable flow control is essential.

FAQs:

An on-off butterfly valve is a type of valve used to control the flow of fluids in a piping system. It is designed primarily for fully open or fully closed positions to start, stop, or regulate flow.

On-off butterfly valves have a disc (or “butterfly”) mounted on a rotating shaft in the center of the pipe. When the valve is fully open, the disc is parallel to the flow, allowing maximum flow through the pipe. When closed, the disc is perpendicular to the flow, completely blocking it.

On-off butterfly valves are used in various industries including water treatment, HVAC systems, chemical processing, oil and gas, power generation, and food and beverage industries. They are suitable for both industrial and commercial applications where reliable on-off flow control is needed.

Factors to consider include the size of the valve (diameter), material compatibility with the fluid and environment, pressure and temperature ratings, flow characteristics, and any specific requirements such as corrosion resistance or compliance with industry standards.

Proper installation, regular maintenance according to manufacturer guidelines, monitoring operating conditions (pressure, temperature, flow rates), and ensuring compatibility of materials with the fluid being controlled are key factors to ensure optimal performance and longevity of on-off butterfly valves.

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