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Double Offset Butterfly Valves

China Double Offset Butterfly Valve, Double Offset Butterfly Valve Manufacturer

TianYu valves As a Professional Double Offset Butterfly Valve Manufacturer in China, We Specialize in Delivering Butterfly Valves Designed for Precision and Reliability.

With our state-of-the-art facilities and skilled workforce, we’re able to deliver top-quality double offset butterfly valves as one of the leading manufacturers in China.
Design Standards: API 609 Cat B
Size Range: 2 – 72 Inch
Pressure Range: Class 150-300 LB
End Connections: Wafer, Lug, Flanged (FF, RF, RTJ)
Material Types: Carbon Steel, Stainless Steel, Duplex Steel, Al-BRZ, Alloy, Ti
Seat Type: PTFE, RPTFE, PPL (for higher temperature), RPTFE+Metal (Fire Safe)
Top Mounting: ISO 5211 top mounting is available
Operation Types: Lever, Gear, Pneumatic Actuator
Bosseal Valve advantages: 0 Leakage, low Torque, Long working life, Low Emission, Bi-direction and fire safe

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Double offset butterfly valve with blue body and manual handwheel, designed for precise flow control in industrial applications
DN50-DN3000 Manual Double Eccentric Butterfly Valve

DN50-DN3000 Manual Double Eccentric Butterfly Valve PTFE Seal Metal Hard Seal Low Double Offset Butterfly Valve

TIANYU DN50-DN3000 Manual Double Eccentric Butterfly Valve offers PTFE soft/metal hard seals, PN0.6-PN6.4 pressure, -20℃-400℃ temperature, and ANSI Class IV-VI leakage for water media. Compliant with API 609/ASME B16.5, it delivers low wear, cost-effective manual control, and scalability across municipal, industrial, and building applications.Customize with 316L/310S stainless steel for extreme corrosion, expanded temperature range (-40℃-500℃) with Inconel seals, gear-reduction handwheel torque adjustment, lockable handles, or flange standards (JIS/BS). Tailor to your pipeline size, pressure, and water media conditions for optimal flow control.
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DOUBLE OFFSET BUTTERFLY VALVE

Double Offset Butterfly Valves

Double Flanged Butterfly Valves are ideal for mounting between flanges, widely used in water treatment, powerplants, dams, and other sectors. They offer pneumatic, electric, manual, or hydraulic operations, functioning as taps, stoppers, or to control fluid flow. Their threaded holes enable easy installation and uninstallation in pipelines.

  • Available in Standard Double Flanged Butterfly Valves & Custom orders & Custom valve assemblies
  • Factory Direct Prices & quality warranty.

Technical Specifications and Design Compliance of Double Offset Butterfly Valves

Double offset butterfly valves feature a dual-eccentric design where the stem axis is offset from both the disc sealing surface and pipeline centerline. They achieve high-efficiency sealing via metal-elastic composite or full-metal seals, suitable for medium-temperature/pressure applications (e.g., chemical, metallurgy, energy industries).
Double Offset Butterfly Valves Key Specifications:
  • Pressure-Temperature: PN16-PN100 (Class 150-Class 600), -40°C~450°C (metal seals up to 550°C).
  • Materials:
    • Body: Ductile iron, WCB carbon steel, 316 stainless steel, duplex steel (2205);
    • Disc: Hardened stainless steel or Stellite alloy surfacing;
    • Seals: EPDM/NBR (soft) or graphite-metal alloy (hard).
  • Connections: Wafer, flanged (RF/RTJ), welded, compliant with ASME B16.5/EN 1092.
  • Actuation: Manual, electric, pneumatic (explosion-proof optional), 30% lower torque than centerline valves.
Double Offset Butterfly Valves Design Compliance:
  • Standards: API 609, ISO 5208 (Class A leakage), NACE MR0175 (corrosion resistance), API 607 (fire-safe for high-temperature models).
  • Testing: 1.5x hydrostatic test (ASME B16.34), ≤0.1% leakage in air tests, 100,000-cycle life test with ≤0.1mm wear.
Double Offset Butterfly Valves Applications:
  • Chemical reactor control (corrosive media);
  • Metallurgical flue gas pipelines (high-temperature metal seals);
  • Heating networks (water hammer reduction via offset design).

 

Advantages: Reduced friction from eccentric structure extends seal life, combining low leakage of soft seals with high-temperature resistance of hard seals for complex Working condition.

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Professional China Valve Manufacturers and Supplier

BEST QUALITY DOUBLE OFFSET BUTTERFLY VALVES FOR YOU

A double offset butterfly valve is widely used in the pipeline for isolation and regulating applications, especially where request frequent open/close.
If you need any support with our Ball Valves, pls contact us!

Double Offset Butterfly Valves Parts

Sealing Element

The sealing element is vital for valves, preventing media leakage when closed. Made of durable, corrosion-resistant materials, it withstands pressure, temperature, and corrosion. Its repeated friction during operation makes material choice and manufacturing quality crucial for sealing performance and valve lifespan, regardless of valve type.

Valve Stem

The valve stem links the closure element to the operating mechanism, controlling its movement to regulate media flow. It requires strength and rigidity to withstand forces while maintaining stability. Its design and quality directly impact the valve’s flexibility and durability.

Valve Body

The valve body serves as the core structure of the valve, forming the main framework that provides installation and support for other components. It houses the internal channels for media flow. Whether it’s a ball valve, butterfly valve, or gate valve, the valve body is the most essential part, directly influencing the valve’s performance, flow characteristics, and service life.

Valve Cover

The valve cover is the enclosed part of the valve, typically connected to the valve body to form a sealed space within the valve. Its main function is to protect the internal components of the valve from external impurities and ensure complete sealing when the valve is closed, preventing media leakage. The design and manufacturing quality of the valve cover significantly impact the overall performance of the valve.

Why Choose Us

Ensure Safety

Our products and services comply with international standards and specifications to make sure that we only produce the best and highest quality products and services to our clients.

Customization Service

We offer tailor-made industrial valves to ensure that our product fits your application standards and demand. TIANYU is ISO, API, MSS, and ASME compliant to guarantee you the highest product quality.

Fast Shipping

As a business partner, TIANYU makes sure that we commit to our clients’ requested deadline because we very much understand the importance of adhering to the timeline required.

After-Sales Service

TIANYU’s service does not end once our industrial ball valves are being delivered. Also, we offer warranties and provide customer service to our clients as part of our quality service.

About Us
valve test apparatus

Founded in 2009, Wenzhou Tianyu Valve Technology Co., Ltd. is a professional valve enterprise integrating design, development, production, and sales services, located in the hometown of Chinese valves – Oubei Town, Wenzhou.

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