ANSI Class 150-600 Triple Offset Butterfly Valves, DN80 Model

• Customization: Available
• Media: Oil
• Driving Mode: Pneumatic
• Model NO.: AOC-3812
• Connection Form: Flange
• Structure: Three-Eccentric Sealing
• Seal Form: Force Sealed
• Valve Stem: Normal
• Work Pressure: High Pressure (10.0mpa< Pn <80.0mpa)
• Working Temperature: Normal Temperature (-40°C<T<120°C)
• Material of Seal Surface: Metal Hard Sealed
• Valve Body: Forge Welding
• Standard: Sil/API
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Body Size: 3′′(80A)-24′′(1500A)
• Body Rating: ANSI Class 150-600 Pn10-Pn110
• Valve Model: DN80/Port DN 80mm
• Connection: Flange/RF
• Flow Characteristic: on-off
• Body Mat.: A216 Wcb/A351CF8m
• Actuator: Pneumatic/Electric
• Stem Mat.: 17-4pH H900
• Seat Mat./Packing: PTFE
• Bonnet Type: Standard
• Air Supply: 0.4MPa
• Valve Stroke: 90 Degree
• Leakage Class: ANSI B16.104V
• Disc Material: A216 Wcb/A351CF8m
• Temp. Range: -20~200 Degree
• Transport Package: Bubble Bags and Wooden Box
• Specification: 110.00cm * 110.00cm * 90.00cm
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 50000PCS/Year

Product Description

 

About SNT Butterfly Valves

^{With unparalleled expertise and over a decade of dedicated experience, SNT Machinery (Qingdao) Co., Ltd. masters the art of crafting meticulously designed butterfly valves. Our solutions cater to both complex and demanding service conditions, delivering unrivaled market superiority. Our international standard-compliant designs meet rigorous benchmarks such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. Our ANSI Class 150-600 Triple Offset Butterfly Valves, DN80 Model, excel across diverse industries-petroleum, chemical, light industry, pharmaceuticals, paper, metallurgy, and rubber-demonstrating our broad application range.}
The AOC-3812 series triple offset butterfly valve stands out with its ingenious bi-directional, bubble-tight shut-off capability. This innovative design ensures that the disc seal precisely aligns with the body seat, delivering exceptional performance.
At the critical moment of final shut-off, the disc seal seamlessly engages the body seat without any unwanted friction or wear. This ensures a torque journey that's smooth and safe.
This advanced engineering produces a resilient seal, fortified with a robust 'wedging' mechanism to guarantee lasting and reliable performance.

 

Product Specifications

 

Body Type	AOC-3811			AOC-3812
Body Size	3''(80A)-24''(600A)			3''(80A)-24''(1500A)
Body Rating	ANSI Class 150-600 PN150-600 PN10-PN110
Fluid Temperature	-196~+500ºC			-196~+500ºC
Connections	Wafer Type/RF/Lug Type			RF Flanged
Body Materials	A216 WCB/A351 CF8/A351 CF8M,etc
Disc Materials	A216 WCB/A351 CF8/A351 CF8M,etc
Disc Treatment	Chrome Plated or Stellited
Range-ability	60 degree Opening/25:1; 90 degree Opening/50:1
Flow Characteristiscs	Approximater Eq%(Inherent Characteristic)
Seal Ring Type	FN	FV	CS	KS	FM	M
Seal Raing Materials	R.TFE	R.TFE	R.TFE	Kel-F	316+Graphite	316SS
Back Ring Materials	NBR	VITON	SUS316	SUS316	316SS	316SS
Seat Leakage	ANSI Class IV/V/VI			ANSI Class VI
Actuator Combinations	Pneumatic Cylinder Actuator/Electronic Actuator/Pneumatic Diaphragm Actuator

 

Principle Of Operation

 

Principle Of Operation

Our ANSI Class 150-600 Triple Offset Butterfly Valves, DN80 Model, proudly showcase the innovative engineering of SNT Machinery (Qingdao) Co., Ltd. These valves promise an exceptional bi-directional bubble-tight shut-off, thanks to a unique and advanced geometry. When the disc seal makes contact with the body seat, it occurs solely at the ultimate shut-off position, thereby eliminating any risk of rubbing or galling. This results in a torque-driven resilient seal, enhanced by a proactive 'wedging' action that guarantees uniform and reliable seal contact throughout its operation.

The Ingenious Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is strategically offset behind the seat axis. This thoughtful design ensures a comprehensive sealing contact enveloping the entire seat, providing unparalleled sealing efficiency.
Offset 2 - The calculated offset of the shaft centerline from both the pipe and valve is a masterstroke. This clever arrangement facilitates a seamless, interference-free opening and closing mechanism, ensuring smooth and efficient valve operations.
Offset 3 - By offsetting the seat cone axis from the shaft centerline, we effectively eliminate friction during both closing and opening. This design not only ensures a frictionless operation but also guarantees a uniform compressive seal that uniformly encompasses the entire seat, elevating sealing performance to new heights.

Valve Construction

 

Ingeniously Engineered Triple-Eccentric Design: Crafted to withstand the most demanding service conditions, this design excels in high temperature and pressure environments, while ensuring minimal leakage. Its unique mechanism allows for frictionless operation during opening and closing, resulting in low torque requirements. Remarkably, the greater the force from the fluid, the more effective the sealing becomes.

Robust Integral Structure of Seat Ring and Body: Featuring a sealing face surfaced with high-strength alloy, this construction guarantees exceptional reliability.
The enhanced durability of the sealing face significantly extends the product's service life, minimizing the need for maintenance.

Stepped Seal for Anti-Blowout Protection: This innovative design ensures security while the integral stem, made from high-strength material, increases the permissible pressure drops.

Revolutionary Driving Mechanism with Offset Round Pin: This method prevents weakening of the stem caused by drilling, thereby enhancing the shearing strength of the round pin and vastly improving reliability and safety.

Advanced Stem Sealing Design: Utilizing high temperature-resistant non-metallic materials, this stem sealing effectively blocks fluid particles from entering the bearing, preventing potential locking or jamming issues.

Dynamic Belleville Spring Loading and Compensation: The packing system incorporates dynamic loading and compensation via Belleville springs. The packing box hole is meticulously rolled and pressed, and the stem undergoes precise processing, ensuring compliance with the TA-Luft emission standards.

Versatile Sealing Options: Including multi-layer composite sealing, multi-layer all-metal sealing, and integral all-metal sealing. Selections are made based on specific service conditions. The multi-layer composite seal offers flexibility for optimal fit between the seat ring and sealing ring, achieving the ANSI VI leakage class.

Protective Thrust Collar: The thrust collar shields the stem from particle accumulation or coking substances in the dead angle area between the stem and body, preventing jamming. In reverse flow, it guards against rotational displacement of the stem due to fluid force, thereby reducing leakage.

Effortless Maintenance: Thanks to the high precision of parts and components, on-
site regulation and seal ring replacement are straightforward and efficient.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands at the forefront of industrial innovation, seamlessly integrating manufacturing, design, sales, and service into a cohesive powerhouse of control valve production. Strategically based in the dynamic city of Qingdao, Shandong province, our expansive facility sprawls across 42,000 square meters, equipped with state-of-the-art workshops and cutting-edge production equipment. As a prestigious high-tech enterprise, we boast independent intellectual property rights and leverage imported advanced management and production expertise. Our robust team comprises over 150 dedicated professionals, with 15% focusing on R&D and 30% holding graduate degrees or higher. Our commitment to excellence is reflected in our substantial output of superior-quality valves, crucial for industries such as petrochemical, oil, and coal chemical sectors, achieving impressive sales of nearly 100 billion in 2017.

SNT proudly holds the esteemed TS Special Equipment Manufacturing Certificate and ISO 9001 certification, underscoring our dedication to quality and safety. We have secured net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside numerous National Patents for our innovative technologies. Our expertise enables us to design and manufacture a comprehensive range of valves meeting ANSI, API, DIN, BS, and JIS standards. By blending global valve advancements with our proprietary R&D initiatives, we produce a diverse array of valves, including Globe Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves, and more.
Our extensive valve portfolio also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. We offer versatile driving options such as manual operation, power-driven, pneumatic, and hydraulic drives. Main parts are crafted from top-grade materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to an impressive 120", with working pressures spanning ANSI 150# to 2500#, and operating temperatures from -196ºC to 1100ºC.

Empowered by state-of-the-art production technology management and an unwavering quality assurance system, SNT Valves are trusted across various sectors including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features prominent names such as SINOPEC Qilu branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others, demonstrating our expansive reach and reliability in the industry.

At SNT, we place paramount importance on our customers' prosperity, dedicating ourselves to crafting unparalleled quality and a distinguished brand identity. Our comprehensive quality assurance and robust after-sales systems ensure that SNT valves are not just products but trusted partners in success, elevating our clients' operations and fostering mutual growth and prosperity.