Triple Offset Metal Seated Butterfly Valves, DN80, 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

^{With over a decade of experience, SNT Machinery (Qingdao) Co., Ltd. is at the forefront of innovation in the butterfly valve industry. Our uniquely designed and expertly crafted Triple Offset Metal Seated Butterfly Valves, DN80, ANSI Class 150-600, are engineered to tackle even the most challenging and severe service conditions with ease. Our valves boast unmatched market competitiveness, characterized by adherence to prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. Discover why our valves are the top choice for applications across diverse sectors including petroleum, chemical processing, pharmaceuticals, paper production, metallurgy, rubber manufacturing, and more.}
The AOC-3812 series triple offset butterfly valve is a technological marvel, designed to offer a bi-directional, bubble-tight shut-off. Its sophisticated geometry ensures that...
...the disc seal engages with the body seat only at the final shut-off position, eliminating any risk of rubbing or galling, thereby delivering a torque-...
...generated resilient seal. This ingenious design provides sufficient 'wedging' to guarantee an exemplary sealing performance, ensuring reliability and durability.

 

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 bi-directional bubble-tight shut-off. Its innovative triple offset geometry ensures that the disc seal only makes contact with the body seat at the precise final shut-off position, completely eliminating any rubbing or galling. This design not only offers a robust, torque-generated resilient seal but also provides optimal 'wedging' action for a consistent and reliable seal contact, ensuring superior performance in demanding applications.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis. This strategic alignment guarantees a full sealing contact encircling the entire seat, ensuring no leakage and optimal performance.
Offset 2 - With the shaft centerline thoughtfully offset from both pipe and valve, the design facilitates smooth and interference-free opening and closing, enhancing the valve's operational efficiency and longevity.
Offset 3 - The seat cone axis is expertly offset from the shaft centerline. This clever configuration eradicates friction during both closing and opening processes, achieving a uniform compressive seal across the entire seat for superior operational integrity and durability.

Valve Construction

 

Ingenious Triple-Eccentric Design: Ideal for extreme service environments, our innovative design shines in high temperature and pressure situations yet keeps leakage to a minimum. Featuring a non-friction, low-torque performance, this valve excels in sealing under increasing fluid forces.

Durable Integral Seat Ring Structure: Equipped with a high-strength alloy on its sealing face, this construction assures enhanced reliability.
of the sealing face, extending the service life significantly, aiming toward minimal maintenance.

Stepped Sealing Against Blowout: Ensures full security while the high-strength integral stem successfully handles significant pressure drops.

Innovative Stem and Disk Drive Method: By using an offset round pin, the design maintains stem strength by avoiding drill-induced weakening. This boosts round pin shear strength, enhancing reliability and safety.

Advanced Stem Sealing Design: Crafted with high-temperature-resistant, non-metallic materials, this stem sealing prevents particle intrusion into the bearing, reducing the risk of lock or jam.

Belleville Springs Dynamic Loading and Compensation: The packing system employs dynamic loading with Belleville springs. The precision-rolled packing box hole and expertly processed stem work harmoniously to eliminate emissions, adhering to TA-Luft standards.

Versatile Sealing Options: Offering a range of seals including multi-layer composite, multi-layer all-metal, and integral all-metal seals. Choose based on specific service needs. Multi-layer composite sealing offers flexibility for optimal fit, achieving ANSI VI leakage class.

Protective Thrust Collar: This mechanism prevents particle and coking accumulation at the stem-body intersection, avoiding jamming. In reverse flow, it averts rotational displacement due to fluid force, thus minimizing leakage.

Maintenance Made Easy: High precision in parts and components ensures on-
site regulation and seamless replacement of seal rings.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a dynamic producer of control valves, integrating manufacturing, design, sales, and services under one prestigious roof. Beginning with a high starting point, SNT has rapidly advanced in the industry. Nestled in the beautiful city of Qingdao, Shandong Province, covering an impressive 42,000 m², our facility boasts modern workshops and cutting-edge production equipment. Recognized as a high-tech enterprise, we hold independent intellectual property rights, enhanced by our adoption of sophisticated management and production techniques from abroad. Our workforce exceeds 150 skilled professionals, with 15% dedicated to R&D and 30% holding graduate degrees or higher. Leveraging a top-tier production management team and pioneering research and development, we produce large volumes of high-quality valves serving petrochemical, oil, and coal chemical sectors. In 2017, our sales reached an impressive nearly 100 billion.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification. We are also recognized with network qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, along with numerous National Patents across various technologies. Our expertise allows us to design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By blending the best aspects of renowned global valves with our proprietary research and development, we produce an extensive array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our sophisticated product lineup extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, among others. These are available with various driving forms such as manual, power-driven, pneumatic, and hydraulic drives. The main components are crafted from premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and excellence. Specifications range from 1/2" to 120" in size, with working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.

Backed by innovative production technology management and a robust quality assurance system, SNT valves are esteemed across the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our distinguished clientele includes major players such as SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, and SINOPEC Changling and Jinan branches, among others. Our commitment ensures a seamless partnership with these prestigious clients.

Placing customer's profits at the forefront, we are dedicated to cultivating an exceptional quality and a reputable brand. Our flawless quality assurance and comprehensive after-sales systems ensure that SNT valves forge prosperous partnerships with our valued customers, achieving collective success and growth.