Triple Offset Butterfly Valves DN80 Model ANSI Class 150-600

• 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. stands at the forefront of butterfly valve innovation, boasting a distinctive design and cutting-edge processing techniques honed through over a decade of dedicated research and production prowess. Our comprehensive solutions cater to the most challenging and rigorous service conditions, ensuring our butterfly valves possess unrivaled market competitiveness. Each design meticulously adheres to international benchmarks such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. With an expansive range of applications, our butterfly valves are indispensable across numerous sectors including petroleum, chemical processing, light industry, pharmaceuticals, paper manufacturing, metallurgy, and the rubber industry.}
The AOC-3812 series triple offset butterfly valve is engineered to offer unparalleled performance with its bi-directional bubble tight shut-off. This unique geometric configuration guarantees
that the disc seal makes contact with the body seat exclusively at the point of final shut-off. This eliminates any rubbing or galling, thereby ensuring a torque-
induced resilient seal that generates ample 'wedging' force to maintain 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

SNT's Triple Offset Butterfly Valve revolutionizes fluid control by delivering a bi-directional, bubble-tight shut-off mechanism. Through its innovative geometry, this valve ensures that the disc seal engages with the body seat solely at the final shut-off stage, entirely eliminating any friction or wear. This results in a torque-induced resilient seal with optimal 'wedging', guaranteeing a consistently uniform seal contact every time.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis. This unique offset enables complete and thorough sealing contact all around the entire seat, ensuring enhanced reliability and performance.
Offset 2 - With precision engineering, the shaft centerline is placed apart from both the pipe and the valve. This configuration permits seamless, interference-free opening and closing of the valve, enhancing operational smoothness.
Offset 3 - The seat cone axis is strategically offset from the shaft centerline. This ingenious design minimizes friction during both closing and opening processes, achieving a uniform compressive seal over the entire seat circumference.

Valve Construction

 

Innovative Design of Triple-Eccentric: Ideal for the most demanding conditions, this design excels in high temperature and pressure environments. It ensures minimal leakage while offering frictionless operation and reduced torque. Remarkably, sealing improves with increased fluid pressure.

Robust Integral Structure of Seat Ring and Body: The sealing surface is enhanced with high-strength alloy, promising unmatched reliability.
This ensures the integrity of the sealing face, significantly extending service life to approach a near maintenance-free experience.

Advanced Stepped Seal for Anti-Blowout: Guarantees maximum security while the high-strength integral stem allows for superior pressure management.

Ingenious Stem and Disk Driving Mechanism with Offset Round Pin: This design prevents any decrease in stem strength from drilling, thus enhancing the round pin's shearing strength, reliability, and security.

State-of-the-Art Stem Sealing Design: Utilizes high-temperature resistant non-metallic materials to block particle-laden fluids from entering bearings, thus preventing lock-ups or jams.

Dynamic Belleville Springs Loading and Compensation: The packing system employs dynamic loading via Belleville springs. The packing box's rolled and pressed hole and specially processed stem work together to eliminate packing emissions, fully complying with the TA-Luft standard.

Diverse Sealing Options: Choose from multi-layer composite, multi-layer all-metal, or integral all-metal seals. Tailor selections to specific conditions. The flexible multi-layer composite seal enhances the fit between seat and seal rings, meeting ANSI VI leakage class.

Protective Thrust Collar: This feature prevents particle or coking substance accumulation in dead angles between the stem and body, avoiding jamming. In reverse flow, it prevents rational displacement due to fluid force, minimizing leakage.

Effortless Maintenance: High precision parts coupled with easy on-
site seal ring regulation and replacement ensure streamlined maintenance processes.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd, a distinguished leader in the world of control valves, seamlessly integrates manufacturing, design, sales, and services. With high aspirations and rapid growth, SNT proudly resides in Qingdao, Shandong province, sprawling across a vast 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment underscore our status as a high-tech enterprise with both independent intellectual property rights and advanced imported management practices. Our talented team of over 150 professionals includes 15% R&D specialists and 30% with graduate or higher degrees. This blend of quality production management and groundbreaking innovation propels us to produce superior valves prominently utilized in petrochemical, oil, and coal chemical industries, achieving nearly 100 billion in sales value in 2017.

SNT holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, along with net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess is further evidenced by numerous national patents. We excel in designing and manufacturing an array of valves in accordance with ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of renowned global valve designs and leveraging our independent R&D, we expertly produce a comprehensive range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, and Angle-regulating Valves, alongside our Eccentric Rotary Valves and T Three-eccentric Center Butterfly Valves.
Our extensive product line further comprises 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 diverse driving methods such as manual, power-driven, pneumatic, and hydraulic. Our main components are crafted from premium materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120" with working pressures ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

Harnessing advanced production technology and a robust quality assurance system, SNT valves are trusted by top industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Prestigious clients such as SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, and PETROCHINA branches in Guangxi and Ningxia regions rely on our expertise and commitment to excellence.

Placing customer profitability at the forefront, we are dedicated to building a brand synonymous with outstanding quality and excellence. Our comprehensive quality assurance and after-sales support systems ensure SNT valves consistently deliver exemplary performance and foster mutually prosperous relationships with our valued customers.