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What Size Of Butterfly Valves Are Super Large And Large Diameter?

The classification of butterfly valves into “large” or “super large” can vary depending on the industry and specific application, but generally, butterfly valves with a nominal diameter (DN) of 600 mm (24 inches) or more are considered large. Super large butterfly valves would typically refer to those with a diameter significantly larger than this, often starting at around DN 1200 mm (48 inches) or even larger.

TIANYU VALVE is a professional manufacturer of large and super-large industrial butterfly valves. We provide comprehensive services covering everything from production and sales to technical support, ensuring a complete end-to-end solution.

We have our self-operated factory to manufacture large diameter butterfly valves, hence we can provide you with the most reasonable prices. Contact TIANYU VALVE now to get your competitive advantage!

Custom Large Diameter Butterfly Valves From TIANYU VALVE

Aluminum Bronze 28” 150LB Lug End Triple Offset Butterfly Valve


  • Nominal Diameter:28”
  • Bore: Full Bore
  • Nominal Pressure:150LB
  • Material: Aluminum Bronze
  • Operation: Lever
  • Design Standard: API609
  • Test/Inspection: API598
  • End Connection: Lug
  • Lug standard: ASME/ANSI B16.47
  • Top Flange: ISO5211

PS: We can manufacture valves to customers’ requirements.

Aluminum Bronze 28” 150LB Lug End Triple Offset Butterfly Valve

Triple-Eccentric Flanged Butterfly Valve


  • Size: DN2000 (80 inches)
  • Pressure Rating: Class 300
  • Operating Temperature: -29°C to +350°C
  • Connection Type: Flanged Connection
  • Valve Body Material: WCB+STL.21
  • Sealing Material: 316+Graphite
  • Operation Type: Electric
  • Design Standard: Compliant with API 609 or AMSE 16.34 International Standards
  • Testing and Inspection Standard: Compliant with API 598 Standard

Triple-Eccentric Flanged Butterfly Valve

PDCPD Large Diameter Butterfly Valve


  • Size: 32”-48” Model: Wafer Style
  • Body: PDCPD Operator: Gear
  • Seat: EPDM, FKM Disc: PDCPD
  • Max Working Press: 110 psi Stem: 403 and 316 stainless steel
  • Max Working Temp: 175°F

Should A Butterfly Valve Be Vertical Or Horizontal?

Yes, flow direction does matter in a large diameter butterfly valve, as it does in butterfly valves of all sizes. The importance of flow direction in butterfly valves relates to several key aspects:

Disc Stability: In some designs, the flow direction can impact the stability of the disc. When the flow is in the direction that pushes the disc towards the closed position, it can help stabilize the disc and reduce vibration or flutter, especially in partially open conditions. This is particularly relevant in large diameter valves, where the forces involved can be significant.

Sealing Performance: The flow direction can affect the sealing capability of the valve. Butterfly valves are typically designed to seal more effectively when the differential pressure assists in pressing the disc against the seat. Installing the valve in the correct orientation ensures optimal sealing performance.

Torque Requirements: The required torque to operate the valve can vary with flow direction. When the flow direction assists in closing the valve, it may reduce the operating torque. Conversely, if the flow pushes against the valve in the opening direction, it might increase the torque requirement. For large diameter valves, where operating forces are already higher, correct installation according to flow direction can help in ensuring that actuation mechanisms are appropriately sized.

Wear and Tear: Correct flow direction can also influence the wear and tear on the valve components. For example, if the valve is installed in a manner that flow-induced forces are detrimental to the disc or seat, it could lead to accelerated wear or damage.

Most butterfly valves are marked with an indication of the preferred flow direction. It’s essential to consult the manufacturer’s documentation for the specific valve being used to ensure it is installed correctly, particularly for large diameter valves where the consequences of incorrect installation can be more significant. Proper installation according to the manufacturer’s specifications is crucial for optimal performance, longevity, and safety of the valve in the system.

What Position Is Recommended For Very Large Butterfly Valves?

As a device used to regulate or cut off the flow of fluids, the installation position of a butterfly valve depends on several factors:

The function of the pipeline: butterfly valve can be installed in any position of the system, including the main pipeline, branch pipeline, bypass, pump inlet and outlet, etc., for controlling or isolating the fluid flow.

Characteristics of the fluid: If the fluid is corrosive or contains solid particles, it may be necessary to install the butterfly valve in a location where it can be easily maintained and replaced.

Design of the system: the installation position of the butterfly valve should be in line with the design of the entire piping system to ensure smooth fluid flow and reduce pressure loss.

Ease of operation and maintenance: Butterfly valves should be installed where they can be easily operated and maintained. For large or heavy butterfly valves, additional equipment or space may be required to aid in operation.

Safety: In high temperature, high pressure or other hazardous environments, butterfly valves should be located with operator safety and convenience in mind.

Space constraints: The compact design of butterfly valves makes them suitable for use in environments where space is limited. In limited space, butterfly valves are often a superior choice to other types of valves.

Pipeline installation: Butterfly valves can be installed in horizontal or vertical pipelines. In horizontal piping, the handle or actuator of the butterfly valve should be easy to operate; in vertical piping, it should be ensured that the operation of the valve is not restricted by the influence of gravity.

Size and weight of the valve: For large or heavy butterfly valves, special consideration may need to be given to the strength of the support structure and mounting.

In general, the installation location of butterfly valves should be decided based on actual application requirements, piping layout, safety, maintenance convenience and ease of operation. In the specific engineering design and installation process, it is usually necessary to follow the relevant industry standards and norms.

If you have any other questions about super large butterfly valves, feel free to contact TIANYU VALVE!


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