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

API 609 ASME B16.5 Class150 NPS10 ASTM B148 C95800 Nickel Aluminum Bronze Manual Double Offshore Eccentric Flanged Butterfly Valve

ASTM B148 C95800 double eccentric flanged butterfly valve with MONEL K-500 stem and EPDM seat is a reliable large diameter isolation and flow regulating valve for seawater and chloride-containing medium. Built to API609, ASME B16.5 and API598 standards, this manual worm gear operated butterfly valve combines double eccentric low-wear sealing design, high anti-corrosion alloy construction and convenient on-site maintenance function. It has become the preferred valve product for marine, offshore, desalination, coastal power and coastal industrial piping projects where reliable shut-off performance and excellent chloride corrosion resistance are the core requirements.

API 609 EN 593 CE Certified DN50-DN1200 PN6-PN25 Class 150 Ductile Cast Iron Double Eccentric Butterfly Valve

API 609/EN 593-certified ductile cast iron double eccentric butterfly valve delivers reliable flow control for water treatment, petrochemical, and HVAC sectors. Its double eccentric design reduces wear and torque, epoxy-coated body resists corrosion, and versatile seats cover -40℃ to 232℃. Customize with SS316 disc for harsh corrosion, metal seats for high temps, or smart electric actuators for automation. Tailored to your media and system, it balances safety, durability, and cost-effectiveness — your trusted valve solution for diverse industrial needs.

API609/ASME DN600 150LB WCB SS316 Flange-to-Flange NBR Soft Seal Disc Double Offset Butterfly Valve

TIANYU’s Gear-Operated Butterfly Valves (DN300–DN2000) excel in large-diameter water mains, with custom gear ratios (5:1–25:1) cutting input force by 90%. Made from ductile iron/316L/duplex 2205 and EPDM/Stellite seats, they meet NSF/ANSI 61 and API 609. Class VI leakage, 100,000+ cycles, and 10-year warranties ensure reliability. On-site support, global parts, and tailored coatings (epoxy) suit potable/wastewater/industrial use—delivering 15% energy savings and 40% lower maintenance costs.

API609 DN500 150LB WCB SS316 Wafer Type NBR Soft Seal Double Offset Butterfly Valve

TIANYU double offset butterfly valve (DN500 150LB, WCB/SS316/NBR, wafer) delivers leak-tight, low-torque flow control for industrial fluids. Its double offset design, corrosion-resistant materials, and soft-seal integrity ensure reliability in chemical, oil & gas, and water systems.Customize with 316L/2205 duplex steel for extreme corrosion, Viton/EPDM seals for specific media, electric/pneumatic actuation for automation, or higher pressure ratings (300LB+) for ultra-high-pressure applications. Tailor to your media, temperature, and operational needs for optimal performance and longevity.

API609/ASME High-Temperature Pneumatic Stainless Steel Wafer Type Positioner Control Regulating Butterfly Valve

TIANYU stainless steel wafer type pneumatic control regulating butterfly valve (DN100-DN2000, PN1, ≤420℃) delivers precision flow control, high-temperature resilience, and space-saving installation for metallurgy, chemical, power, and cement industries. API 609/ASME compliance, metal hard seal, and multi-drive options ensure reliability in harsh industrial environments.Customize with 316L/2205 duplex steel for extreme corrosion, PN10-PN25 pressure ratings, electric/hydraulic actuation, Stellite 6 hardfacing for abrasives, or ATEX/IECEx certification for hazardous zones. Tailor size, seal material, and positioner type to your process media, temperature, and automation needs for optimal performance.

High-Performance DN80 Class 150 WCB Soft-Sealed Lug-Type Double Eccentric Butterfly Valve

TIANYU 3” Class 150 WCB lug-type double eccentric butterfly valve delivers extended service life, reliable sealing, and flexible installation for oil, gas, chemical, and industrial applications. It combines double eccentric design, WCB durability, lug-type versatility, and soft-sealed performance, backed by API/ASME standards.Customize with 304/316 stainless steel for corrosion resistance, PTFE/EPDM seals for media compatibility, electric/pneumatic/hydraulic actuators, or fire-safe configurations. Tailor to your pressure, temperature, and automation needs for optimal performance.

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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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.
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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.

Double Offset Butterfly Valves

China Double Offset Butterfly Valve, Double Offset Butterfly Valve Manufacturer

Technical Specifications and Design Compliance of Double Offset Butterfly Valves

Related News

BEST QUALITY DOUBLE OFFSET BUTTERFLY VALVES FOR YOU

Double Offset Butterfly Valves Parts

Sealing Element

Valve Stem

Valve Body

Valve Cover

Why Choose Us

Ensure Safety

Customization Service

Fast Shipping

After-Sales Service

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