High-Performance Triple Offset Butterfly Valves for Industrial Use

• 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 legacy of over 10 years in the field, SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of innovation in the design and manufacturing of butterfly valves. Our expertise is evident in our unique designs and cutting-edge processing techniques. SNT valves are engineered to deliver exceptional performance, even in the most demanding conditions. They are crafted to comply with global standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009, ensuring reliability and safety. Our solutions are the preferred choice across diverse industries, including petroleum, chemical, light industry, pharmaceuticals, papermaking, metallurgy, and rubber. Experience unmatched market competitiveness with SNT's Triple Offset Butterfly Valves, specially designed for complex service conditions.}
The AOC-3812 series of triple offset butterfly valves from SNT represents the pinnacle of precision engineering. These valves excel by providing a bi-directional, bubble-tight shut-off, a critical feature for ensuring leak-proof performance in challenging environments. The innovative geometry of the AOC-3812 series guarantees efficiency and reliability.
Our design ensures that the disc seal makes contact with the body seat exclusively at the final shut-off position. This unique mechanism eliminates friction and wear, thereby enhancing longevity and performance. The resulting experience is a torque-controlled operation that redefines resilience and sustainability in valve technology.
Our advanced sealing technology creates a torque-generated resilient seal. This 'wedging' effect ensures a secure and reliable shut-off, safeguarding your processes with absolute confidence and precision.

 

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 a marvel of engineering, designed to deliver exceptional bi-directional bubble-tight shut-off. Its unique geometry ensures that the disc seal engages the body seat only at the final shut-off position. This innovative design eliminates rubbing or galling, thereby offering a torque-generated resilient seal. This precise 'wedging' effect guarantees uniform seal contact, ensuring reliable and long-lasting performance.

The Triple Offset Geometry

Offset 1 - Ingeniously, the shaft is positioned behind the seat axis. This strategic offset enables complete sealing contact around the entire seat, maximizing efficiency and reliability.
Offset 2 - The shaft centerline is cleverly offset from the pipe and valve, allowing for interference-free operation. This thoughtful design ensures smooth opening and closing of the valve.
Offset 3 - Ingenious engineering places the seat cone axis offset from the shaft centerline. This design innovation eliminates friction during the valve's closing and opening cycles, ensuring uniform compressive sealing around the entire seat for superior performance.

Valve Construction

 

Ingenious Triple-Eccentric Design: Perfectly suited for the harshest environments with high temperature and pressure. This innovative design ensures minimal leakage while offering a non-friction, low torque operation during opening or closing. The greater the fluid force, the more impeccable the sealing becomes.

Integrated Seat Ring and Body Structure: With a sealing face surfaced by a high-strength alloy, we promise unmatched reliability.
This ensures the sealing face's durability and extends the valve's lifespan, bringing it almost to a non-maintenance state.

Stepped Seal for Anti-Blowout Protection: This design guarantees utmost safety, while the high-strength integral stem material enhances the allowable pressure drops.

Innovative Stem and Disk Driving Method: By employing an offset round pin design, we eliminate the risk of decreased stem strength due to drilling. This not only boosts the shearing strength of the round pin but also enhances reliability and security.

State-of-the-Art Stem Sealing Design: Utilizing high-temperature resistant non-metallic materials, this design prevents particle-laden fluids from entering the bearing, thus averting lock up or jamming issues.

Dynamic Belleville Springs for Optimal Packing: Our packing system incorporates dynamic loading and compensation via Belleville springs. The packing box is crafted through rolling and pressing processes. The stem undergoes meticulous processing to eliminate packing emissions and comply with the ta-luft standard.

Diverse Sealing Options: Choose from multi-layer composite sealed, multi-layer all-metal sealed, and integral all-metal sealed options. Select the perfect match for your specific service conditions. The multi-layer composite sealed option offers flexibility, ensuring a better fit between the seat ring and seal ring, thus achieving ANSI VI leakage class.

Protective Thrust Collar: A stem-protecting thrust collar prevents dead angle areas accumulating particles or coking substances between the stem and body, thus avoiding stem jamming. In reverse flow, it safeguards against stem displacement due to fluid forces, preventing significant leakage.

Effortless Maintenance: Experience high precision with parts and components that facilitate on-
site regulation and seamless replacement of seal rings.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a dynamic and innovative leader in the realm of control valve production. Seamlessly integrating manufacturing, design, sales, and service, SNT boasts a strategic location in the bustling city of Qingdao, Shandong province, sprawling over 42,000 square meters. Our state-of-the-art workshops and cutting-edge production facilities reflect our commitment to excellence. As a high-tech enterprise fortified with independent intellectual property rights, we import avant-garde management and production expertise. Our dedicated team of over 150 employees includes 15% R&D specialists and 30% graduates or holders of advanced degrees, embodying our relentless pursuit of quality and innovation. Our vast array of high-quality valves serves the petrochemical, oil, and coal chemical industries, achieving nearly 100 billion in sales in 2017 thanks to our superior production management and pioneering research and development.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, along with prestigious net qualification certificates from leading giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio is enriched with numerous national patents for advanced technologies. We excel in designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the best features of globally renowned valves with our own R&D breakthroughs, we skillfully craft a diverse selection of valves. These include 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 versatile lineup further encompasses V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, among others. We offer a range of actuation methods, including manual operation, power-driven, pneumatic, and hydraulic drives. The principal components are crafted from premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and performance. Our valve specifications cover 1/2"~120", with working pressures from ANSI 150#~2500#, and operational temperatures ranging from -196ºC to 1100ºC.

SNT's unwavering dedication to advanced production technology and a robust quality assurance system has cemented our reputation in numerous 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, and PETROCHINA Ningxia Branch trust our impeccably engineered valves. We are proud to serve a diverse clientele that includes notable branches of SINOPEC and PETROCHINA, underscoring our commitment to excellence.

Placing our customers' prosperity at the heart of our mission, SNT is dedicated to building exceptional quality and a revered brand. Our meticulous quality assurance and responsive after-sales services ensure that SNT valves form enduring partnerships with all our clients, fostering mutual growth and success.