Triple Offset Metal Seated Valves Body Rating 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

^{SNT Machinery (Qingdao) Co., Ltd. is a trailblazer in the realm of butterfly valves, boasting a distinctive design, state-of-the-art processing technology, and over a decade of pioneering expertise. We deliver tailored solutions for all varieties of complex and demanding service environments. Our butterfly valves are exceptionally competitive in the market, adhering to globally recognized standards including ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This remarkable product line finds extensive application across diverse sectors such as petroleum, chemical, light industry, pharmaceuticals, paper manufacturing, metallurgy, and the rubber industry.}
The AOC-3812 series triple offset butterfly valve is engineered to deliver impeccable bi-directional bubble-tight shut-off. This specialized geometry guarantees,
that the disc seal engages with the body seat solely at the ultimate shut-off point, avoiding any rubbing or galling. This design ensures a torque,
generated resilient seal with sufficient 'wedging' action to guarantee a secure closure.

 

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 innovative SNT triple offset butterfly valve is engineered to deliver a superior bi-directional bubble-tight shut-off. Its unique geometric design ensures that the disc seal engages with the body seat exclusively at the ultimate shut-off position, without any friction or wear. This meticulous engineering provides a torque-induced resilient seal, featuring a comprehensive wedging action that guarantees consistent and uniform seal contact, offering unparalleled reliability and performance.

The Triple Offset Geometry

Offset 1 - The shaft is ingeniously positioned behind the seat axis, allowing for a complete sealing engagement around the entire seat circumference. This strategic offset ensures optimal sealing effectiveness, enhancing the valve's durability and performance.
Offset 2 - The ingenious design includes the shaft centerline being offset from both the pipe and valve, which facilitates an interference-free operation. This configuration ensures seamless opening and closing of the valve, significantly reducing wear and extending the valve's lifespan.
Offset 3 - The seat cone axis is offset from the shaft centerline. This precise offset is key to eradicating friction during both the closing and opening processes while achieving consistent, compressive sealing throughout the entire seat area. This design ensures reliable operation and longevity.

Valve Construction

 

Design of Triple-Eccentric: This remarkable design is specifically engineered to withstand the most severe service conditions, handling high temperatures and pressures with ease. It offers unparalleled performance by minimizing leakage, thanks to its non-friction and low-torque operation during the opening and closing phases. The greater the fluid force, the more exceptional the sealing capability.

Integral Structure of Seat Ring and Body: Featuring a sealing face surfaced with high-strength alloy, this design ensures outstanding reliability.
The sealing face is meticulously engineered to extend service life, approaching a state of near non-maintenance, providing peace of mind and enduring performance.

Stepped Sealed for Anti-Blowing Out: This innovative feature guarantees security, while the integral stem constructed from high-strength material enhances allowable pressure drops, providing robust safety and efficiency.

Advanced Stem and Disk Driving Method: Utilizing the offset of round pin, this design prevents stem strength reduction due to drilling. This improvement enhances the shearing strength of the round pin, ensuring superior reliability and security.

Stem Sealing Excellence: Crafted from high-temperature resistant non-metallic materials, this stem sealing design effectively prevents fluid with particles from entering the bearing, ensuring smooth operation and avoiding locking or jamming.

Belleville Springs - Dynamic Loading and Compensation: The packing system features dynamic loading and compensation through Belleville springs. With rolling and pressing in the packing box hole, and expertly processed stems, it eliminates packing emissions to meet the stringent TA-Luft standard.

Versatile Sealing Options: Offering multi-layer composite sealed, all-metal sealed, and integral all-metal sealed choices, each tailored to specific service conditions. Multi-layer composite sealing provides flexibility, ensuring an optimal fit between seat ring and sea ring, achieving ANSI VI leakage class.

Thrust Collar Protection: Designed to safeguard the stem from particle or coking substance accumulation in dead angle areas between the stem and body, preventing jammed stems. In reverse flow, it protects against stem displacement due to fluid force, minimizing leakage risks.

Convenient Maintenance: Ensures high precision in parts and components for efficient on-
site regulation and seamless replacement of seal rings, making maintenance straightforward and hassle-free.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a distinguished producer of control valves, seamlessly integrating manufacturing, design, sales, and service into one cohesive unit. With a cutting-edge approach, SNT flourishes with rapid development, strategically nestled in the vibrant city of Qingdao, Shandong province, sprawling across an impressive 42,000 square meters. Our state-of-the-art workshops and advanced production equipment mark us as a leader in innovation. Acknowledged as a high-tech enterprise, we proudly hold independent intellectual property rights and have imported premier management and production expertise. Our dedicated team comprises over 150 skilled professionals, with 15% focused on R&D and 30% holding graduate degrees or higher. Through our unwavering commitment to quality production management and pioneering research, we deliver an extensive range of superior valves, serving the petrochemical, oil, and coal chemical sectors with distinction. In 2017, we achieved a remarkable sales milestone, reaching nearly 100 billion.

SNT has proudly attained the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside securing the esteemed network qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further underscored by numerous national patents. We excel in the design and manufacture of a comprehensive array of valves, adhering to esteemed international standards such as ANSI, API, DIN, BS, and JIS. By integrating global valve innovations with our proprietary research and development, we now produce a diverse range 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 product lineup includes V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, among others. We offer versatile driving forms, encompassing manual operation, power-driven, pneumatic, and hydraulic drive. The main components are crafted from premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Our specifications span from 1/2"~120", supporting working pressures of ANSI 150#~2500#, and can withstand a wide temperature range from -196ºC to 1100ºC.

Leveraging our advanced production technology management and stringent quality assurance system, SNT Valves have gained widespread adoption across the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and more, all of whom entrust in our reliability and excellence.

With a steadfast commitment to prioritizing our customers' success, SNT Machinery is dedicated to establishing a brand synonymous with exceptional quality. Our impeccable quality assurance and comprehensive after-sales support systems ensure that we build enduring partnerships with our clients, steadfastly working together towards mutual prosperity and success.