Triple Offset Metal Seated Butterfly Valves 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

^{With a wealth of over a decade in pioneering design and manufacturing, SNT Machinery (Qingdao) Co., Ltd. has emerged as a leader in the butterfly valve industry. Our unique, cutting-edge design and advanced processing capabilities enable us to offer tailored solutions for even the most challenging and demanding service conditions. Our butterfly valves boast exceptional market competitiveness and are engineered to comply with renowned international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This versatile series finds extensive applications across diverse industries, including petroleum, chemical, light industry, pharmaceuticals, papermaking, metallurgy, and rubber, showcasing our commitment to excellence.
The AOC-3812 series triple offset butterfly valve is a marvel of engineering, designed to provide a bi-directional bubble-tight shut-off. This sophisticated geometry ensures,
that contact between the disc seal and the body seat occurs only at the critical final shut-off position, completely eliminating any rubbing or galling. This design innovation delivers a torque, induced resilient seal with optimal 'wedging' action, guaranteeing}

 

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 stands as a pinnacle of design, offering a bi-directional bubble tight shut-off that is unparalleled in its efficiency. Its innovative geometry ensures that the disc seal meets the body seat at the precise final shut-off position, free from any rubbing or galling. This advanced engineering results in a torque-generated resilient seal, providing an optimal 'wedging' action to guarantee a consistent and uniform seal contact.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned offset behind the seat axis. This meticulous placement allows for complete sealing contact around the entire circumference of the seat, ensuring impeccable sealing performance.
Offset 2 - With the shaft centerline strategically offset from both the pipe and valve, this design innovation allows for interference-free opening and closing, ensuring seamless operation under all conditions.
Offset 3 - The seat cone axis is expertly offset from the shaft centerline. This sophisticated arrangement eliminates friction during both closing and opening, achieving a uniform and compressive sealing effect that surrounds the entire seat with perfection.

Valve Construction

 

Ingeniously crafted with a triple-eccentric design, these valves rise to the challenge of severe service conditions, handling high temperatures and pressures with finesse. The innovative design ensures low friction and minimal torque during operation, enhancing sealing efficiency in response to increased fluid force.

The seat ring and body boast an integral structure, with sealing faces surfaced in high-strength alloy, promising unparalleled reliability and longevity, ensuring a near maintenance-free experience.
of the sealing face, extending the valve's service life, and minimizing maintenance needs.

The stepped seal design offers robust anti-blowout protection, ensuring safety under pressure. The high-strength integral stem elevates the permissible pressure drop tolerances.

The offset round pin in the stem and disk driving method eliminates the strength reduction caused by drilling. This enhancement ensures superior shearing strength, reliability, and security.

Engineered for excellence, the stem sealing utilizes high-temperature resistant non-metallic materials, thwarting particle-laden fluid infiltration into bearings, preventing locks or jams.

Employing dynamic loading and compensation via Belleville springs, the packing system meets TA-Luft standards. The packing box features rolling and pressing, while stem processing eradicates emissions.

Offering a variety of sealing options, including multi-layer composite, all-metal, and integral all-metal seals. Each provides tailored solutions for diverse service conditions, with multi-layer composites offering flexibility for optimal seat ring fit and ANSI VI leakage class compliance.

The thrust collar acts as a protective guardian, preventing particle and coking substance buildup in dead angle areas between stem and body, thus averting stem jams. In reverse flow, it guards against fluid-induced stem displacement that could lead to substantial leaks.

Ease of maintenance is ensured through precision-engineered parts and components, allowing for seamless on-
site regulation and replacement of seal rings, maintaining operational fluidity.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands as a premier producer of control valves, seamlessly integrating manufacturing, design, sales, and services. Embarking on a journey of rapid growth from a strong foundation, SNT is strategically located in Qingdao, Shandong province, sprawling over 42,000 square meters with state-of-the-art workshops and cutting-edge production equipment. Proudly a high-tech enterprise with independent intellectual property rights, SNT draws on advanced international management and production expertise. With a dedicated team of over 150 professionals, where R&D specialists constitute 15% and individuals with graduate degrees or higher make up 30%, SNT thrives on a high-caliber production management team and trailblazing research and development. Our superior quality valves, produced in substantial volumes, are indispensable in petrochemical, oil, and coal chemical sectors, culminating in an impressive sales value nearing 100 billion in 2017.

SNT has achieved the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We proudly hold numerous National Patents in cutting-edge technologies. Our expertise extends to designing and manufacturing every series of valves in compliance with standards like ANSI, API, DIN, BS, and JIS. By blending renowned global valve advantages with our own pioneering R&D, SNT crafts a diverse array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves.
SNT's diverse valve lineup continues with V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, to name a few. Available with manual, electric, pneumatic, and hydraulic actuators, our valves are crafted from premium materials such as A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. They cover specifications from 1/2" to 120", withstand pressures from ANSI 150# to 2500#, and operate in temperatures ranging from -196ºC to 1100ºC.

Harnessing advanced production technology and a robust quality assurance system, SNT Valves are the preferred choice in petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes the SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, PETROCHINC Guangxi branch, and SINOPEC Changling branch, Jinan branch, among others.

At SNT, we prioritize the prosperity of our customers, steadfastly committing to exceptional quality and a distinguished brand reputation. Our comprehensive quality assurance and after-sales systems ensure that SNT valves forge lasting partnerships with all our customers, driving collective success and future growth.