Understanding The Difference Between Single and Double Flange Butterfly Valves

The difference between double flange butterfly valves [https://www.iflowmarinevalves.com/butterfly-valve/] and single flange butterfly valves [https://www.iflowmarinevalves.com/butterfly-valve/] mainly lies in their structure, installation method, pressure capability, and typical applications. Choosing the right type affects system safety, sealing reliability, and maintenance efficiency.

1. Structural Design

A double flange butterfly valve has two full flanges, one on each side of the valve body.This structure offers excellent alignment and stability.

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Bolts directly to both pipeline flanges

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Valve becomes a fixed part of the pipeline

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Provides strong mechanical support

A single flange butterfly valve has one flange, usually on one side, while the other side connects differently.This design saves space and reduces weight.

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One flanged connection

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The opposite side may be wafer-type or spigot-style

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Lighter and more compact

2. Installation Method

Double Flange:Installed using bolts on both sides.Requires more installation space.Easy to align during mounting.The valve can handle higher tightening forces.

Single Flange:Installed with fewer bolts.Faster to install.Limited axial support.Alignment accuracy depends more on pipeline conditions.

Image: https://www.iflowmarinevalves.com/uploads/d-flange-butterfly-valve.png

3. Pressure and Strength CapabilityDouble Flange Butterfly Valve

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Better suited for medium to high pressure systems

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Strong resistance to pipe movement and vibration

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Suitable for larger pipe diameters

Single Flange Butterfly Valve

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Generally used in low to medium pressure systems

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Less resistant to mechanical stress

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Best for smaller or less critical pipelines

4. Sealing Performance

Double flange valves:More uniform gasket compression.Better long-term sealing reliability

Single flange valves:Depend more on installation accuracy.May experience uneven sealing under stress

5. Maintenance and ReplacementDouble Flange

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Easy to remove as an independent pipeline section

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Suitable for systems requiring frequent maintenance

Single Flange

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Removal may affect pipe alignment

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Better for systems with limited maintenance needs

Image: https://www.iflowmarinevalves.com/uploads/s-flange-butterfly-valve.png

6. Typical ApplicationsDouble Flange Butterfly Valves

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Marine pipelines

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Water treatment plants

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Power stations

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Large-diameter industrial systems

Single Flange Butterfly Valves

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HVAC systems

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Compact piping layouts

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Light industrial applications

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Cost-sensitive projects

Media Contact
Company Name: Qingdao I- Flow Co., Ltd.
Email:Send Email [https://www.abnewswire.com/email_contact_us.php?pr=understanding-the-difference-between-single-and-double-flange-butterfly-valves]
Address:Unit 1517-1520, Building 4, Excellence Century Center, No. 31 Longcheng Road
City: Qingdao
Country: China
Website: https://www.iflowmarinevalves.com/

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