Metal Seated Triple Offset Butterfly Valves, DN80, Body Size 3′′-24′′

• 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

^{At SNT Machinery (Qingdao) Co., Ltd., we pride ourselves on our unmatched expertise in the design and advanced processing of butterfly valves. With over a decade of dedicated experience, we stand as a beacon of quality and innovation in butterfly valve manufacturing. Our solutions are adept at handling a variety of complex and demanding service conditions, ensuring reliability and efficiency where it matters most. Engineered to comply with prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009, our butterfly valves boast formidable market competitiveness. These versatile valves find widespread application across sectors, including petroleum, chemical, light industry, pharmaceuticals, paper making, metallurgy, and the rubber industry.}
The AOC-3812 Series: A Pinnacle of Engineering in Triple Offset Butterfly Valves! This series is renowned for its bi-directional bubble-tight shut-off, ensuring unparalleled sealing performance. With its innovative geometry,
the disc seal achieves contact with the body seat strictly at the ultimate shut-off position, eliminating any rubbing or galling. This design enhances torque,
producing a resilient, torque-generated seal with optimal 'wedging' capabilities to guarantee secure and reliable sealing.

 

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

The SNT triple offset butterfly valve is a marvel of engineering, offering impeccable bi-directional, bubble-tight shut-off capabilities. Its unique geometry ensures that the disc seal makes contact with the body seat solely at the final shut-off position, preventing any rubbing or galling. This ingenious design generates a torque-driven, resilient seal, featuring an effective 'wedging' mechanism to guarantee uniform seal contact throughout.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is placed behind the seat axis, allowing for complete sealing contact encircling the entire seat, ensuring optimal performance and reliability.
Offset 2 - With the shaft centerline strategically positioned from the pipe and valve, this design facilitates interference-free opening and closing of the valve, enhancing operational efficiency.
Offset 3 - The seat cone axis is expertly offset from the shaft centerline, a move that eradicates friction during the opening and closing phases, ensuring a uniform compressive seal around the entire seat for maximum durability and performance.

Valve Construction

 

Design of Triple-Eccentric: Engineered for the most demanding environments, our valve is perfectly suited for severe conditions involving extreme temperatures and pressures. With a unique non-friction design and low torque operation, this valve ensures enhanced sealing - the greater the fluid force, the superior the seal.

Integral Structure of Seat Ring and Body: The sealing face is meticulously surfaced with a high-strength alloy, offering unmatched reliability and robustness.
This excellence in design extends the valve's service life and minimizes the need for maintenance, providing near-zero upkeep benefits.

Stepped Sealed for Anti-Blowout Protection: The valve's stepped sealed design guarantees maximum safety. Its integral stem, crafted from high-strength materials, enhances pressure drop tolerance, ensuring optimal performance.

Innovative Driving Method: Utilizing an offset round pin design, this method prevents reduction in stem strength from drilling. It significantly bolsters the shearing strength of the pin, enhancing both reliability and security.

Advanced Stem Sealing Design: Employing non-metallic materials resistant to high temperatures, our stem sealing effectively prevents particulate ingress, maintaining smooth operation without locking or jamming.

Belleville Springs for Dynamic Loading and Compensation: Our advanced packing system incorporates dynamic loading with Belleville springs. The packing box's precisely rolled and pressed hole, along with expertly processed stems, ensures zero packing emissions, complying with the TA-Luft standard.

Diverse Sealing Options: Choose from multi-layer composite, all-metal, and integral all-metal seals tailored to various service conditions. The multi-layer composite offers flexibility, achieving optimal fit between seat and seal rings, meeting the ANSI VI leakage class.

Thrust Collar Protection: Our stem's thrust collar prevents particle or coking substance buildup in dead angle areas, preventing jamming. In reverse flow, it safeguards against stem displacement caused by fluid force, reducing the risk of large leaks.

Convenient Maintenance: Ensures effortless on-site regulation and seamless replacement of seal rings.
All components are engineered to precision, facilitating easy maintenance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a dynamic and innovative leader in the control valve arena, seamlessly blending cutting-edge manufacturing, ingenious design, effective sales strategies, and unparalleled service into one cohesive powerhouse. Strategically nestled in the industrious city of Qingdao, Shandong province, our expansive 42,000 square meter facility is a beacon of modernity, outfitted with the latest workshops and production equipment. As a high-tech enterprise, we proudly hold independent intellectual property rights and leverage world-class management and production methodologies. Our robust team of over 150 skilled professionals includes 15% dedicated R&D specialists, with 30% boasting graduate-level education or higher. This diverse and expert workforce fuels our ability to create superior quality valves, serving key sectors such as petrochemical, oil, and coal chemical industries. With an impressive sales milestone nearing 100 billion in 2017, our reputation for excellence continues to soar.

SNT has achieved prestigious certifications such as the TS Special Equipment Manufacturing Certificate and ISO 9001, alongside securing the coveted net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our extensive portfolio of national patents highlights our relentless pursuit of technological innovation. We offer bespoke valve design and manufacturing services, adhering to stringent ANSI, API, DIN, BS, and JIS standards. By harmonizing the best features of renowned valves globally with our own pioneering research and development, we produce an extensive range of valves including the Globe Valve, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our diverse product lineup features the likes of T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. These can be operated manually or via power-driven, pneumatic, and hydraulic systems. We use premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring top-notch durability. Our specifications range from 1/2" to a substantial 120", with working pressures of ANSI 150# to 2500#, and reliable performance in temperatures spanning -196ºC to 1100ºC.

Leveraging advanced production techniques, meticulous quality management, and a robust assurance system, SNT Valves have become a trusted choice across industries like petrochemical, oil, steel & iron, paper manufacturing, and power generation. Our esteemed clientele includes prominent names such as SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, and more, showcasing our widespread industry acceptance and reliability.

At SNT, customer success is our paramount goal. We are dedicated to fostering excellence and building a commendable brand reputation. Our comprehensive quality assurance and after-sales support systems are crafted to ensure our valves not only meet but exceed expectations, forging thriving partnerships and shared prosperity with all of our esteemed customers.