DN80 Model Triple Offset Metal Seated Butterfly Valves, ANSI Rated

• 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 unmatched innovation and over a decade of expertise, SNT Machinery (Qingdao) Co., Ltd. leads the way in crafting butterfly valves. Our designs are pioneering and our processing techniques advanced, positioning us at the forefront of solutions for both complex and severe service conditions. Our butterfly valves are distinguished by robust market competitiveness and align with esteemed international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. These superior valves are integral to multiple sectors, including petroleum, chemical, light industry, pharmaceuticals, paper production, metallurgy, and rubber industries.}
The AOC-3812 series triple offset butterfly valve is designed to deliver exceptional performance with its bi-directional bubble-tight shut-off capability. This ingenious geometry guarantees flawless closure, ensuring reliability and durability.
In the final shut-off position, the disc seal seamlessly contacts the body seat, eliminating friction and preventing any potential galling. This exceptional design offers a torque-efficient solution,
with a robust torque-generated resilient seal. This ensures an optimal 'wedging' effect, providing unwavering sealing integrity that stands the test of time.

 

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

SNT triple offset butterfly valve delivers unparalleled bi-directional bubble tight shut-off. The unique geometry is crafted to ensure the disc seal engages with the body seat only at the ultimate shut-off position. This contact occurs without any rubbing or galling, resulting in a torque-generated resilient seal. The design incorporates adequate "wedging" to guarantee consistent and uniform seal contact each and every time.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis. This strategic placement allows for full sealing contact around the seat's entirety, ensuring unmatched sealing efficiency.
Offset 2 - Thoughtfully offset from the pipe and valve, the shaft's centerline facilitates interference-free opening and closing of the valve, enhancing performance and reliability.
Offset 3 - The seat cone axis is smartly offset from the shaft centerline, effectively eliminating friction during the valve's closing and opening operations. This precision engineering achieves a uniform compressive seal around the entire seat, optimizing the valve's efficiency.

Valve Construction

 

Innovative Triple-Eccentric Design: Perfectly engineered for challenging environments, the DN80 Model excels under extreme high-temperature and high-pressure conditions. Its advanced non-friction mechanism ensures minimal torque during operation, achieving exceptional low-leakage performance. The greater the fluid force, the more impeccable the sealing efficiency.

Robust Integral Seat Ring Structure: Crafted with precision, the sealing face is enhanced with a high-strength alloy that assures unwavering reliability.
of the sealing interface, significantly extending its service life, approaching near-zero maintenance.

Enhanced Protection with Stepped Seal: Guarantees safety, while the single-piece high-strength stem substantially boosts permissible pressure drops.

Advanced Stem and Disk Drive with Offset Round Pin: This innovative design prevents stem weakening due to drilling, thereby augmenting the shearing strength of the round pin, enhancing reliability and safety.

Sophisticated Stem Sealing Design: Utilizing high-temperature resistant non-metallic materials, it effectively prevents particles from contaminating the bearings, thus averting lockups or jams.

Dynamic Loading & Compensation with Belleville Springs: The packing system is dynamically loaded and compensated using Belleville springs. The packing box's hole is professionally rolled and pressed, with the stem meticulously processed to eliminate emissions, ensuring compliance with the TA-Luft standard.

Versatile Sealing Options: Featuring multi-layer composite, all-metal, and integral all-metal sealing, each tailored to specific conditions. The flexible multi-layer composite seal enhances fitting precision between seat and seal rings, meeting the stringent ANSI VI leakage class.

Protective Thrust Collar: Designed to prevent particle accumulation in the dead angle between stem and body, guarding against jamming. In reverse flow, it prevents rational displacement due to fluid forces, safeguarding against significant leaks.

Effortless Maintenance: Achieving high precision in parts and components for
on-site adjustment and seamless seal ring replacement.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a leading manufacturer of control valves, seamlessly blending manufacturing, design, sales, and services under one roof. With a high starting point for rapid development, SNT is strategically located in the bustling city of Qingdao, Shandong province, sprawling across an impressive 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment make us a beacon of innovation. As a high-tech enterprise, we proudly boast independent intellectual property rights, complemented by advanced management and production expertise from global sources. Our team consists of over 150 dedicated professionals, with a significant 15% focusing on R&D, and 30% holding graduate or higher-level degrees. With a dynamic production management team and a relentless drive for technological advancement, we manufacture high-quality valves extensively utilized in the petrochemical, oil, and coal chemical sectors. In 2017, we achieved an impressive sales value nearing 100 billion, a testament to our commitment to excellence.

SNT proudly holds the prestigious TS special equipment manufacturing certificate, alongside the ISO 9001. We are honored to be recognized by the net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation has been acknowledged with multiple national patents. We design and manufacture a complete range of valves that adhere to international standards like ANSI, API, DIN, BS, and JIS. By merging the best features of renowned valves worldwide with our unique research and development, we've cultivated an exceptional product line. Our expertise extends to crafting all types 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 portfolio also includes V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. We offer a variety of driving forms such as manual operation, power-driven, pneumatic, and hydraulic options. The main parts are crafted from premium materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our products accommodate specifications ranging from 1/2" to a remarkable 120", withstanding working pressures of ANSI 150# to 2500#, and operating temperatures between -196ºC and 1100ºC.

With our advanced production technology, management acumen, and robust quality assurance systems, SNT Valves are ubiquitous in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele features industry leaders like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and several others.

At SNT, we prioritize our users' profitability, dedicating ourselves to establishing an unparalleled standard of quality and a revered brand. Our comprehensive quality assurance and exceptional after-sales service systems ensure that SNT valves foster enduring partnerships with our customers, paving the way for shared prosperity and growth.