Triple Offset Metal Seated Valves, Butterfly, ANSI Rated 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

^{At SNT Machinery (Qingdao) Co., Ltd., we pride ourselves on our unique design capabilities, cutting-edge processing technology, and over a decade of dedicated expertise in the development and production of butterfly valves. We offer tailored solutions for a multitude of challenging and demanding service conditions. Our butterfly valves boast exceptional market competitiveness and are meticulously crafted to adhere to international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. These products are extensively utilized across a diverse range of industries including petroleum, chemical processing, light manufacturing, pharmaceuticals, papermaking, metallurgy, and the rubber industry.}
The AOC-3812 series triple offset butterfly valve is engineered to deliver a bi-directional bubble-tight shut-off, a remarkable feature that ensures superior performance in all applications.
This specialized geometry guarantees that the disc seal engages with the body seat exclusively at the final shut-off position, effectively preventing any rubbing or galling. This design ensures a consistent and reliable torque,
facilitated by a resilient seal that incorporates adequate 'wedging' to guarantee secure sealing and enhanced operational efficiency.

 

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 engineered to deliver exceptional performance, offering a bi-directional, bubble-tight shut-off. Thanks to its ingenious design, this unique geometry ensures that the disc seal comes into contact with the body seat solely at the final shut-off position. This innovative approach prevents any rubbing or galling, thus providing a torque-generated, resilient seal. The clever 'wedging' mechanism guarantees a consistent and uniform seal contact, ensuring maximum efficiency and reliability.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis, enabling complete and thorough sealing contact around the entire seat, enhancing the integrity and performance of the valve.
Offset 2 - The shaft centerline's strategic offset from the pipe and valve allows for interference-free operation, ensuring smooth and efficient opening and closing of the valve.
Offset 3 - By offsetting the seat cone axis from the shaft centerline, friction is virtually eliminated during both closing and opening. This ensures a uniform, compressive seal around the entire seat, promoting long-lasting durability and reliability.

Valve Construction

 

Ingenious Triple-Eccentric Design: Masterfully crafted for rigorous conditions, this design is adept at handling the extremes of high temperature and pressure. A marvel of engineering, it operates with non-friction and low torque, ensuring that the greater the fluid force, the more impeccable the seal becomes.

Robust Integral Seat Ring and Body Structure: Enhanced with high-strength alloy surfacing, this structure ensures absolute reliability and long-term performance.
The sealing face is crafted for durability, extending service life to near non-maintenance levels.

Anti-Blowout Stepped Seal: Safety is paramount with this design. The high-strength integral stem enhances pressure drop capabilities, ensuring secure operation.

Innovative Stem and Disk Drive Method: Featuring an offset round pin design, this prevents strength reduction due to drilling. It enhances the shearing strength of the round pin, boosting both reliability and safety.

Advanced Stem Sealing Design: Utilizing high-temperature resistant non-metallic materials, this sealing system prevents particle-laden fluid from entering the bearing, thus averting potential lock-ups or jamming.

Dynamic Loading and Compensation with Belleville Springs: This packing system leverages the dynamic loading capability of Belleville springs. The packing box is meticulously rolled and pressed, while the stem undergoes precise processing to eliminate emissions, meeting the stringent TA-Luft standard.

Diverse Sealing Options: Choose from multi-layer composite seals, all-metal seals, and integral all-metal seals. Each is tailored for specific service conditions. The multi-layer composite seal offers remarkable flexibility, achieving superior alignment between the seat ring and seal ring, aligned with ANSI VI leakage standards.

Protective Thrust Collar: This essential component guards against particle or coking substance accumulation in the dead angle area between the stem and body, preventing stem jamming. In reverse flow, it safeguards against rational displacement from fluid force, averting significant leakage.

Ease of Maintenance: Experience the convenience of high-precision parts and components that facilitate seamless on-site regulation and
seal ring replacement, ensuring your system remains operational with minimal interruptions.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of innovation as a distinguished producer of control valves. Seamlessly integrating manufacturing, design, sales, and service, SNT embarks on a high-start journey of swift development. Nestled in the vibrant city of Qingdao, Shandong province, our expansive facility sprawls over 42,000 square meters, featuring state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, we boast independent intellectual property rights and leverage advanced international management and production expertise. Our dynamic team comprises over 150 dedicated employees, with 15% specializing in research and development, and 30% holding graduate or higher degrees. Fueled by a commitment to excellence, our top-tier production management and pioneering R&D efforts culminate in the creation of premium valves widely utilized across petrochemical, oil, and coal chemical industries. In 2017, our sales values soared to nearly 100 billion.

At SNT, we have proudly secured the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, alongside net qualification endorsements from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess is underscored by multiple national patents. We excel in the design and manufacture of comprehensive valve series adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of globally renowned valves with our independent R&D, we have mastered the production of an extensive array of valves, including Globe Valves, High-Pressure Boiler Blow-down Valves, High-Performance Butterfly Valves, Angle-Regulating Valves, Eccentric Rotary Valves, and Three-Eccentric Center Butterfly Valves.
Our expansive 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, accommodating various driving forms such as manual, power-driven, pneumatic, and hydraulic. The main components are crafted from premium materials like A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", capable of withstanding working pressures from ANSI 150# to 2500# and operating temperatures from -196ºC to 1100ºC.

SNT Valves, a testament to advanced production technology and a stringent quality assurance system, have become indispensable across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes distinguished names like SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, SINOPEC Changling and Jinan branches, exemplifying the trust and reliance placed in our superior valve solutions.

Prioritizing our customers' profitability, we are unwaveringly committed to crafting exceptional quality and establishing a reputable brand. Our impeccable quality assurance and comprehensive after-sales service systems ensure that SNT valves forge enduring partnerships with our clients, paving the way for shared prosperity and success.