Double Butterfly Valve
Products Description
NEWLOTOKE's Double Eccentric Butterfly Valve (also known as double offset butterfly valve) is a high-performance valve solution for water, industrial, and gas applications. Unlike standard concentric butterfly valves, our double eccentric design ensures that the disc moves away from the seat during operation, minimizing wear and eliminating common leakage issues.
Designed with durability and long-term performance in mind, these valves are ideal for critical isolation applications where reliability and sealing performance are essential. Whether used in municipal water systems, chemical plants, or distribution pipelines, NEWLOTOKE valves deliver exceptional flow control and operational stability.
Product Detail
|
Specification |
Description |
|
Brand |
NEWLOTOKE |
|
Product Type |
Double Eccentric Butterfly Valve |
|
Size Range |
DN50 to DN1200 |
|
Pressure Rating |
PN10 / PN16 / PN25 |
|
Body Material |
Ductile Iron with Fusion Bonded Epoxy Coating |
|
Disc Material |
Stainless Steel / Duplex Steel / Nickel Plated |
|
Seat Material |
EPDM / NBR / PTFE (optional) |
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Shaft Material |
SS420 / SS431 / Monel (optional) |
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Coating |
FBE Coating (standard) or customized coating |
|
End Connection |
Wafer / Lug / Flanged |
|
Working Temperature |
-20°C to +120°C (media dependent) |
|
Actuation Options |
Manual / Pneumatic / Electric / Hydraulic |
|
Standards |
ISO 5752, EN593, API 609, AWWA C504 |
|
Applications |
Waterworks, Industrial, Gas, HVAC, Power Plants |
Product Advantages & Features
Leak-Free Design
The double offset structure ensures that the disc does not contact the seat during operation, which eliminates seat deformation and common leakage paths found in concentric designs.
Dry Shaft Construction
Equipped with multiple O-ring seals and bronze bushings to prevent water ingress and internal corrosion, ensuring a long, maintenance-free service life.
Corrosion Resistance
The interior and exterior surfaces are coated with high-quality fusion bonded epoxy (FBE), enhancing durability even in aggressive media.
Long Service Life
With the first scheduled maintenance recommended after 20 to 25 years, the valve is designed for a lifespan of over 30 years in standard operating conditions.
Low Operating Torque
The offset design reduces the contact area between the disc and seat, resulting in smooth operation and lower actuator costs.
Versatile Applications
Ideal for use in clean water, wastewater, air, gas, and industrial fluids. Suitable for pump stations, treatment plants, transmission pipelines, and more.
Fast Maintenance
Modular parts and a streamlined structure allow for easy inspection and on-site repair, reducing downtime and operational costs.
Reliable Stock and Delivery
Common sizes such as DN100–DN600 are available from stock. Larger or customized valves can be delivered within 2–4 weeks based on project needs.
Why choose us?
Used at the project site
Join Us as Our Valve Distributor
NEWLOTOKE is a manufacturing enterprise specializing in the research, development and production of valves, we welcome global partners to join us to develop the market and create the future together!
✅ Factory direct supply, reliable quality
Professional valve manufacturing, stable quality, complete certification.
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The implementation of a place an agent, to ensure that the profit margin.
✅ Technical support, supporting materials
Provide product information, technical support and promotional materials to help sales.
FAQ
Q1：What is the key difference between a double eccentric and a concentric butterfly valve?
A：concentric butterfly valve has the disc centered within the seat, leading to constant contact, wear, and leakage. A double eccentric valve offsets the disc and shaft from the seat, reducing friction and extending the valve's lifespan.
Q2：Can NEWLOTOKE double butterfly valves be used in potable water systems?
A：Yes, our valves are equipped with WRAS-approved EPDM rubber and food-grade coatings, making them safe and compliant for use in drinking water networks.
Q3：Do the valves require frequent maintenance?
A：No. The dry shaft design eliminates corrosion risks, and the first recommended maintenance interval is 20–25 years under standard use.
Q4：Are actuators available?
A：Yes. We provide manual, pneumatic, electric, and hydraulic actuators along with optional accessories like solenoid valves, limit switches, and position indicators.
Q5：How quickly can I receive my order?
A：Standard sizes are typically in stock and ready to ship. For larger or customized valves, our lead time is 2 to 4 weeks depending on the order volume and specifications.
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