Butterfly Valves Triple Offset Metal Seated ANSI Class

• 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

^{The company boasts a distinctive design, state-of-the-art manufacturing processes, and over a decade of expertise in the development and production of butterfly valves. We deliver robust solutions for diverse and challenging service conditions. Our butterfly valves are exceptionally competitive in the market, adhering to international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. This versatile product line finds applications across a spectrum of industries, including petroleum, chemical, light industry, pharmaceuticals, paper production, metallurgy, and rubber manufacturing.}
The AOC-3812 series triple offset butterfly valve offers an unparalleled bi-directional bubble-tight shut-off. Its unique geometry ensures
that the disc seal contacts the body seat only at the final shut-off position, avoiding any rubbing or galling. This design delivers a torque
induced resilient seal with ample "wedging" to guarantee a secure seal.

 

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

Discover the unparalleled precision of SNT's triple offset butterfly valve, expertly designed to deliver impeccable bi-directional bubble-tight shut-off. Its unique geometry ensures that the disc seal delicately contacts the body seat only at the final shut-off position, avoiding any rubbing or galling. This results in a torque-generated resilient seal, with a strategic 'wedging' action that guarantees a consistently uniform seal contact for optimal performance.

The Triple Offset Geometry

Offset 1 - Ingeniously engineered, the shaft is positioned behind the seat axis, allowing for complete and seamless sealing contact around the entire seat circumference.
Offset 2 - Strategically, the shaft centerline is offset from both the pipe and valve, ensuring interference-free valve operations, granting smooth opening and closing cycles.
Offset 3 - With precision, the seat cone axis is offset from the shaft centerline, expertly eliminating friction during the valve's closing and opening. This provides a uniform and compressive sealing experience around the entire seat.

Valve Construction

 

Cutting-Edge Triple-Eccentric Design: Impeccably suited for the rigorous demands of high temperature and pressure environments, our valves exhibit unmatched performance with minimal leakage. Experience frictionless operation with low torque during opening or closing, where increased fluid force results in superior sealing.

Robust Integral Seat Ring Structure: Our valve's seat ring seamlessly integrates with the body, featuring a high-strength alloy surfacing on the sealing face, ensuring unparalleled reliability.
Prolonged Durability and Minimal Maintenance: The expertly crafted sealing face extends service life, offering an experience that is virtually free from maintenance hassles.

Stepped Sealing for Enhanced Security: Enjoy peace of mind with our anti-blowout stepped seal, fortified by an integral stem composed of high-strength materials to withstand significant pressure variations.

Ingenious Stem and Disk Connection: Utilizing an offset round pin design, our system prevents stem strength reduction due to drilling, thereby enhancing the pin's shearing strength alongside improved reliability and security.

Advanced Stem Sealing Design: Crafted from high-temperature resistant non-metallic materials, our stem sealing efficiently repels particle-laden fluids, guarding against bearing lock or jam.

Dynamic Belleville Springs Loading & Compensation: Benefit from our innovative packing system featuring dynamic loading and compensation. With a precision-processed stem and rolling-pressed packing box, emissions are minimized, aligning with TA-Luft standards.

Diverse Sealing Options: Choose from multi-layer composite, multi-layer all-metal, or integral all-metal seals, tailored to specific service conditions. Our multi-layer composite seals provide adaptive flexibility, ensuring optimal fit and adherence to ANSI Class VI leakage standards.

Protective Thrust Collar: Our thrust collar prevents dead zones where particles or coking might accumulate, avoiding stem jamming. In reverse flow scenarios, it prevents undue stem displacement, thus reducing the risk of larger leaks.

Effortless Maintenance: Experience precision-engineered components that allow for easy onsite adjustment.
and seamless replacement of seal rings, ensuring your system remains at peak performance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a beacon of innovation in the realm of control valves, seamlessly integrating the processes of manufacturing, design, sales, and service into one cohesive powerhouse. Boasting a dynamic start and rapid growth, SNT is strategically situated in Qingdao, Shandong province, sprawling over an impressive 42,000 square meters. Our facility is outfitted with cutting-edge workshops and state-of-the-art production equipment, representing a high-tech enterprise enriched with independent intellectual property rights and enhanced by imported advanced management and production know-how. Our robust team, over 150 strong, includes R&D specialists constituting 15% of our workforce, with 30% holding graduate degrees or higher. Driven by a commitment to superior production management and pioneering technology, we specialize in the mass production of top-grade valves pivotal to the petrochemical, oil, and coal chemical industries. In 2017, our sales soared to an impressive nearly 100 billion.

SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and the ISO 9001 certification, underscoring our commitment to excellence. We are also recognized with the Net Qualification Certificate from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further validated by numerous National Patents. Our expertise enables us to engineer and craft a comprehensive range of valves adhering to global standards such as ANSI, API, DIN, BS, and JIS. By amalgamating the benefits of renowned valves worldwide with our independent R&D, we offer an extensive array of valves, such as GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, among others.
Our diverse range of valves includes Triple-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. Our driving forms encompass manual operation, power-driven, pneumatic, and hydraulic drive systems. The materials employed for our main components include A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc., with specifications ranging from 1/2" to 120", working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.

Leveraging our advanced production technology and rigorous quality assurance system, SNT valves are trusted across a multitude of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features major industry players like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, as well as SINOPEC Changling and Jinan branches, and more.

We prioritize our users' success, dedicating ourselves to the creation of superior quality and a reputable brand. Our meticulous quality assurance and comprehensive after-sales systems ensure that SNT valves foster prosperity alongside our valued customers, creating mutually beneficial partnerships and a thriving future together.