Triple Offset Butterfly Valves, Metal Seated, 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

^{With a distinctive design and cutting-edge processing capabilities, SNT Machinery (Qingdao) Co., Ltd. boasts over a decade of expertise in the engineering and production of butterfly valves. Our solutions cater to an array of complex and challenging service conditions, ensuring our butterfly valves stand out in the competitive market. Engineered to meet prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009, our products are versatile in application, finding utility across various industries including petroleum, chemicals, pharmaceuticals, light industry, papermaking, metallurgy, and the rubber industry.}
The AOC-3812 series triple offset butterfly valve is engineered for excellence, delivering bi-directional bubble-tight shut-off. The innovative geometry of this valve ensures a flawless seal.
At the ultimate shut-off position, the disc seal engages the body seat seamlessly without any friction or wear, resulting in a smooth torque-generated closure.
This resilient seal employs a strategic 'wedging' action to assure durability and reliability, making it a prime choice for demanding applications.

 

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 exceptional design of the SNT triple offset butterfly valve guarantees a reliable, bi-directional bubble-tight shut-off. This innovative geometry ensures that the disc seal perfectly aligns with the body seat only at the final shut-off position. This unique feature eliminates any potential for rubbing or galling, while providing a torque-induced resilient seal. The intelligent 'wedging' mechanism ensures a consistent and uniform seal contact, delivering unparalleled sealing performance.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is set behind the seat axis to enable complete and flawless sealing contact around the entire seat, enhancing the valve's sealing efficiency.
Offset 2 - Strategically positioned, the shaft centerline is set apart from the pipe and valve, ensuring an unobstructed, interference-free opening and closing operation of the valve.
Offset 3 - Ingeniously crafted, the seat cone axis is offset from the shaft centerline, effectively eliminating friction during opening and closing processes. This ensures an even and compressive seal around the entire seat, enhancing operational reliability.

Valve Construction

 

Ingenious Triple-Eccentric Design: Perfectly engineered to withstand the harshest conditions of high temperature and pressure, this valve ensures minimal leakage. Experience smooth, frictionless operation with low torque, and enjoy enhanced sealing with increasing fluid force.

Robust Integral Structure: The seat ring and body are crafted as a unified structure, with a sealing face reinforced by high-strength alloy, ensuring unmatched reliability.
This design not only fortifies the sealing face but also extends the valve's lifespan, edging it towards a maintenance-free experience.

Secure Stepped Sealing: Prevents blowouts effectively, while the high-strength integral stem elevates allowable pressure drops, ensuring operational security.

Innovative Drive Method: By offsetting the round pin, the system avoids weakening the stem by drilling, thereby enhancing the round pin's shearing strength for increased reliability and security.

Advanced Stem Sealing Design: Utilizing high-temperature resistant non-metallic materials, it prevents particle-laden fluids from entering the bearing, thus avoiding lock-ups or jams.

Belleville Springs for Dynamic Loading and Compensation: The packing system incorporates dynamic loading with Belleville springs. The packing box's holes are expertly rolled and pressed, and the stem is processed to eliminate emissions, adhering to the stringent TA-Luft standards.

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

Thrust Collar Protection: The thrust collar protects the stem, preventing particle or coking build-up in dead angles. It restricts stem rotational displacement due to fluid force, minimizing the risk of significant leakage.

Effortless Maintenance: High precision parts ensure seamless on-
site adjustment and easy replacement of seal rings, streamlining maintenance processes.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a beacon of innovation in the control valves industry, seamlessly integrating manufacturing, design, sales, and service under one roof. Positioned in the thriving city of Qingdao, Shandong Province, our expansive 42,000m2 facility boasts cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise with proprietary intellectual property rights, we blend advanced management techniques with global production insights. Our team of over 150 dedicated professionals includes 15% R&D specialists and 30% graduates or individuals with higher degrees. Driven by a commitment to excellence, we deliver a vast array of premium valves vital to petrochemical, oil, and coal chemical sectors, achieving a remarkable sales turnover nearing 100 billion in 2017.

SNT has proudly attained the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation, securing network qualification certificates from leading entities like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our groundbreaking technological advancements have been recognized with numerous national patents. We excel in designing and producing an extensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of renowned global valve technologies with our own pioneering R&D, we craft diverse valves, including GLOBE, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and Triple-offset Center Butterfly Valves.
Our product line encompasses V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Operational modalities span manual, electric, pneumatic, and hydraulic drives, with primary materials such as A216 WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures of ANSI 150# to 2500#, and a temperature capacity stretching from -196ºC to 1100ºC.

With our forward-thinking production techniques and robust quality assurance systems, SNT Valves are extensively employed across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Esteemed clientele include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and many more, including SINOPEC Changling and Jinan branches.

At SNT, our customers' success is our utmost priority. We are dedicated to creating an impeccable quality standard and a prestigious brand. Our comprehensive quality assurance and after-sales support systems ensure that SNT Valves partner with all our clients to foster mutual growth and shared prosperity.