Premium Triple Offset Butterfly Valves 3′′-24′′ 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. boasts a unique design with advanced processing techniques, drawing on over a decade of dedicated expertise in the research and manufacturing of butterfly valves. We provide comprehensive solutions that cater to a range of complex and demanding service conditions, ensuring our butterfly valves excel in market competitiveness. Our design rigorously adheres to esteemed international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This exceptional series finds versatile applications across industries including petroleum, chemical, light industry, pharmaceuticals, paper manufacturing, metallurgy, and rubber, among others.}
The AOC-3812 series triple offset butterfly valve is engineered to deliver a bi-directional, bubble-tight shut-off. Its innovative geometry guarantees precision,
as the disc seal engages the body seat solely at the final shut-off position, eliminating any risk of rubbing or galling. This provides a torque-driven,
resilient seal with effective 'wedging' to ensure enduring performance and reliability.

 

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 crafted to provide unparalleled bi-directional bubble-tight closure. This ingenious geometry ensures that the disc seal engages with the body seat solely at the final shut-off stage, thereby eliminating any friction or damage. This results in a torque-induced resilient seal, enhanced by a precise 'wedging' action that guarantees a uniform and reliable seal contact, delivering exceptional performance and durability.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis, facilitating a flawless sealing contact across the entire seat, ensuring optimal performance and reliability.
Offset 2 - With strategic positioning, the shaft centerline is offset from both the pipe and valve, enabling smooth, interference-free operation during the opening and closing processes of the valve.
Offset 3 - The seat cone axis is intelligently offset from the shaft centerline, effectively minimizing friction during both the closing and opening phases. This design ensures a consistent and comprehensive compressive seal around the entire seat, enhancing efficiency and longevity.

Valve Construction

 

Ingenious Design of Triple-Eccentric: Engineered to excel in the most challenging environments, our valve is perfect for high temperature and pressure settings. Experience exceptional performance with low leakage during opening or closing, powered by a frictionless and low torque operation. The greater the fluid force, the superior the seal becomes.

Integral Structure of Seat Ring and Body: Featuring a sealing face enhanced with a high-strength alloy, this integral construction guarantees enduring reliability.
This ensures an unyielding sealing face, markedly prolonging service life and approaching a state of non-maintenance.

Anti-Blowing Out Stepped Sealing: Secure in its design, this feature ensures safety while the high-strength material of the integral stem boosts permissible pressure drops.

Offset Design for Stem and Disk: Utilizing a round pin offset, this design prevents stem strength reduction caused by drilling, thereby enhancing the round pin's shearing strength, reliability, and security.

Advanced Stem Sealing Design: Crafted from high-temperature resistant non-metallic materials, it effectively blocks particle-infused fluids from entering the bearing, preventing locking or jamming.

Dynamic Loading and Compensation with Belleville Springs: Employing dynamic loading and compensation, our packing system utilizes Belleville springs. The packing box hole is expertly rolled and pressed, while the stem is precisely processed, eliminating packing emissions to comply with TA-Luft standards.

Diverse Sealing Options: Choose from multi-layer composite sealed, multi-layer all-metal sealed, or integral all-metal sealed to suit various operational requirements. Our multi-layer composite sealing adapts flexibly for optimal alignment between the seat ring and sea ring, meeting ANSI VI leakage class.

Thrust Collar Protection: The stem-protecting thrust collar prevents particle or coking substance accumulation between the stem and body, avoiding stem jamming. In reverse flow, it shields the stem from rotational displacement due to fluid force, reducing the risk of significant leakage.

Maintenance Made Easy: With high-precision parts and components,
onsite regulation and easy replacement of seal rings ensure seamless maintenance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of innovation as a manufacturer of premium control valves, merging manufacturing expertise, innovative design, comprehensive sales, and exceptional service. Strategically situated in the vibrant city of Qingdao, Shandong province, our sprawling 42,000m2 facility is equipped with state-of-the-art workshops and cutting-edge production machinery. As a distinguished high-tech enterprise boasting independent intellectual property rights, we leverage imported advanced management and production methodologies. Our skilled workforce exceeds 150, with 15% dedicated to research and development and 30% holding graduate or higher degrees. Driven by a superior production management team and pioneering technological innovation, we produce a vast array of high-quality valves for the petrochemical, oil, and coal chemical industries, achieving a sales value approaching 100 billion in 2017.

SNT proudly holds the esteemed TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside prestigious net qualification certifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our groundbreaking technologies have earned multiple National Patents. We excel in designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By integrating the strengths of world-renowned valves with our proprietary R&D, we manufacture an extensive variety 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, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Our driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic operations. We craft main components from robust materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc. Specifications range from 1/2" to 120", sustaining working pressures of ANSI 150# to 2500#, and enduring temperatures from -196ºC to 1100ºC.

Our SNT Valves, supported by advanced production technology management and a rigorous quality assurance system, are trusted across a wide array of sectors, including petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Esteemed customers such as SINOPEC Qilu branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and more have placed their trust in our products.

Placing customer success at the heart of our operations, we are dedicated to building a brand synonymous with exceptional quality. Our comprehensive quality assurance and after-sales systems ensure that SNT valves forge enduring partnerships with all our clients, driving shared success and prosperity.