Double Disc Butterfly Valve
Products Description
NEWLOTOKE's double disc butterfly valve is a high-performance solution designed to meet the toughest requirements in industrial flow control. Featuring a double-offset disc design and a robust dual-flange configuration, this valve offers exceptional sealing, reduced torque, and long-term operational reliability.
The valve's engineered disc geometry ensures minimal seat wear and optimized flow control, making it ideal for demanding environments such as water treatment, chemical processing, and power generation. Manufactured with premium materials, this valve combines durability with corrosion resistance, ensuring performance even in high-pressure or chemically aggressive systems.
Product Detail
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Specification |
Description |
|
Brand |
NEWLOTOKE |
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Product Type |
Double Offset Butterfly Valve (Double Disc Design) |
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Size Range |
DN50 to DN1200 (2"–48") |
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Pressure Rating |
PN10 / PN16 / PN25 / ANSI 150 |
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Body Material |
Ductile Iron, Carbon Steel, Stainless Steel |
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Disc Material |
Stainless Steel / Duplex / Nickel-Plated / Composite Resin |
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Seat Material |
EPDM / NBR / PTFE / Metal Seat (Optional) |
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Shaft Material |
SS420 / SS431 / Monel / Encapsulated Composite Shaft |
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Coating |
FBE Coating / Epoxy / Customized Anti-Corrosion Coating |
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Connection Type |
Double Flange / Wafer / Lug |
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Working Temperature |
-20°C to +200°C (media dependent) |
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Standards |
ISO 5752, API 609, AWWA C504, EN593 |
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Applications |
Waterworks, Chemical Plants, Power Stations, Pipelines |
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Actuation Options |
Manual, Pneumatic, Electric, Hydraulic |
Product Advantages & Features
Double-Offset Disc Design
Reduces friction and seat wear through a camming motion that lifts the disc off the seat during operation. This minimizes break-away torque and extends sealing life.
Dual-Flange Mounting
Ensures reliable, stable installation with strong axial clamping forces from both flanges, simplifying setup and enhancing long-term performance under dynamic load.
Optimized Disc Profile
The offset, contoured disc provides enhanced flow capacity and pressure control while minimizing turbulence and vibration.
Corrosion-Resistant Construction
Available with composite resin components or corrosion-resistant metal alloys, offering superior protection in chemically aggressive and high-temperature environments.
Uninterrupted Disc Seal (360°)
A full-circle seal around the disc ensures no leak paths around the shaft hubs - eliminating common failure points in PTFE or rubber-lined designs.
Durability & Lightweight Options
Optional composite body versions offer weight reduction of up to 70% compared to metal valves, making handling and installation more efficient while maintaining strength.
Chemical Compatibility
Compatible with a wide range of media including acids, caustics, salt solutions, and organic solvents. Ideal for both clean water and corrosive industrial applications.
Why choose us?
Used at the project site
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FAQ
Q: What is the "double disc" or double-offset design?
A: It refers to the disc and shaft being offset in two directions, allowing the disc to disengage from the seat during opening/closing. This reduces torque, minimizes seat wear, and enhances sealing performance.
Q: Is this valve suitable for chemical applications?
A: Yes. With materials such as epoxy novolac resin or duplex stainless steel, our valves perform reliably in aggressive chemical environments, including acids, caustics, and solvents.
Q: Can this butterfly valve be installed vertically or horizontally?
A: Yes. The double flange design allows flexible installation in both orientations, making it suitable for a wide range of pipeline layouts.
Q: How does the NEWLOTOKE valve compare to traditional metal valves?
A: Our composite or hybrid double disc butterfly valves weigh significantly less, resist corrosion better, and often offer longer maintenance intervals - without compromising pressure or flow capacity.
Q: What is the expected service life?
A: When used within recommended parameters, the valve can exceed 30 years of operation with minimal maintenance, thanks to the dry shaft design and seat-saving offset disc.
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