High-Performance Triple Offset Butterfly Valve, ANSI Class 150-600

• 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

^{SNT Machinery (Qingdao) Co., Ltd. boasts a distinctive design and cutting-edge processing techniques, backed by over a decade of expertise in the exploration and creation of butterfly valves. Our solutions cater to all types of complex and demanding service conditions, ensuring superior performance. Our butterfly valves are fiercely competitive in the market, adhering to international standards like ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This exceptional range finds extensive applications across diverse industries, including petroleum, chemical, light industry, pharmaceuticals, paper production, metallurgy, and rubber industries.}
The AOC-3812 series triple offset butterfly valve is engineered to deliver a bi-directional bubble-tight shut-off, thanks to its innovative geometry.
This design guarantees that the disc seal engages the body seat solely at the final shut-off position, eliminating friction or wear and tear, thereby ensuring a torque-activated,
resilient seal. It is designed with a strategic 'wedging' action, synonymous with reliability, to secure a flawless closure.

 

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 innovative SNT triple offset butterfly valve stands as a testament to engineering excellence, delivering a bi-directional bubble-tight shut-off. Its advanced geometry ensures that the disc seal engages the body seat precisely at the final shut-off position, eliminating any risk of rubbing or galling. This unique mechanism provides a torque-generated resilient seal, featuring a strategic 'wedging' action that guarantees uniform and reliable seal contact.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is offset behind the seat axis, facilitating complete and flawless sealing contact across the entire seat, ensuring unparalleled reliability and performance.
Offset 2 - This configuration strategically positions the shaft centerline offset from both the pipe and valve, ensuring interference-free operations with smooth opening and closing of the valve, enhancing operational efficiency.
Offset 3 - By offsetting the seat cone axis from the shaft centerline, this valve effectively eliminates friction during both closing and opening processes. This results in a uniform and compressive sealing action across the entire seat, offering exceptional durability and consistent performance.

Valve Construction

 

Ingeniously engineered with a state-of-the-art triple-eccentric design, these valves are built to excel in extreme service conditions of high temperature and pressure, maintaining minimal leakage. The unique mechanism ensures non-friction movement and low torque operation, with the sealing efficiency positively correlated to the fluid force-greater force results in superior sealing.

The seat ring and body are crafted into an integrated structure, with the sealing face reinforced by a high-strength alloy. This guarantees exceptional reliability and extends the service life, virtually eliminating maintenance needs.
of the sealing face, thereby significantly extending its service life and ensuring that maintenance requirements are nearly obsolete.

With stepped sealing engineered to prevent blowouts, this design ensures unparalleled security. The integral stem, composed of high-strength materials, enhances permissible pressure drops, elevating both performance and safety.

The innovative driving method employs an offset round pin for the stem and disk, cleverly avoiding the reduction of stem strength from drilling. This design bolsters the shearing strength of the round pin, enhancing overall reliability and safety.

Stem sealing is meticulously designed using high-temperature-resistant non-metallic materials, effectively preventing particle-laden fluids from infiltrating the bearings, thereby averting potential lock-ups or jamming.

The Belleville springs offer dynamic loading and compensation, creating a robust packing system. The packing box is meticulously processed using rolling and pressing techniques, while the stem undergoes precision machining to virtually eliminate emissions, proudly meeting ta-luft standards.

A variety of sealing options are available, including multi-layer composite sealed, multi-layer all-metal sealed, and integral all-metal sealed, offering flexibility to suit diverse service conditions. The multi-layer composite seal provides enhanced adaptability, ensuring optimal alignment between the seat ring and sealing ring, meeting ANSI VI leakage standards.

Equipped with a protective thrust collar, this feature prevents particle or coking build-up in the dead angle between the stem and body, thus preventing jamming. Moreover, it averts potential stem displacement due to reverse fluid force, minimizing leakage risks.

Maintenance is rendered exceptionally hassle-free thanks to the high precision of parts and components, allowing for on-
site regulation and seamless replacement of seal rings, ensuring minimal downtime and sustained peak performance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a distinguished manufacturer specializing in the production of control valves. We seamlessly integrate manufacturing, design, sales, and services, ensuring a comprehensive approach to meet the needs of our clients. With a strategic location in Qingdao, Shandong province, our expansive facility covers 42,000 square meters, outfitted with state-of-the-art workshops and production equipment. As a high-tech enterprise, we boast independent intellectual property rights and leverage advanced management and production experience sourced globally. Our team exceeds 150 talented individuals, with 15% dedicated R&D specialists and 30% holding graduate or higher degrees. Our commitment to high-quality production and innovative technology has enabled us to deliver superior valves for petrochemical, oil, and coal chemical industries. Remarkably, our sales soared to nearly 100 billion in 2017.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001, alongside network qualification certificates from prestigious entities such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological advancements are underscored by numerous national patents. We excel in designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of globally renowned valve technologies with our own groundbreaking research and development, we produce an extensive variety of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and Three-eccentric Center Butterfly Valves.
Our diverse valve lineup also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, etc. We offer versatile driving forms such as manual, power-driven, pneumatic, and hydraulic. Our main components are manufactured from high-grade materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, catering to specifications of 1/2" to 120", with working pressures ranging from ANSI 150# to 2500#, and operating temperatures between -196ºC to 1100ºC.

Our cutting-edge production technology management and rigorous quality assurance systems ensure that SNT Valves are sought after across a multitude of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients, such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and many others, trust SNT for their valve needs, exemplifying our commitment to excellence and reliability.

At SNT, we prioritize our clients' profitability, dedicating ourselves to crafting an exceptional quality and reputable brand. Our impeccable quality assurance and after-sales service systems ensure that SNT valves maintain strong partnerships with our clients, collaboratively paving the way for mutual success and prosperity.