Metal Seated Triple Offset Valves, Butterfly, Body Rating Pn10-Pn110

• 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., proudly presents a decade of innovation and expertise in the world of butterfly valves. Our unique designs, cutting-edge processing techniques, and commitment to quality allow us to provide bespoke solutions for a wide array of complex and challenging service conditions. Renowned for their robust market competitiveness, our butterfly valves are meticulously engineered to adhere to prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. Our comprehensive product line finds extensive applications across diverse industries including petroleum, chemical, light industry, pharmaceuticals, paper making, metallurgy, and the rubber industry, ensuring we meet the highest expectations of performance and reliability.}
The AOC-3812 series triple offset butterfly valve is an engineering marvel that offers bi-directional bubble-tight shut-off. Its precision geometry is designed to perfection,
ensuring that the disc seal engages the body seat solely in the final shut-off position. This eliminates the risks of rubbing or galling, thus creating a torque-energized,
resilient seal. This innovative 'wedging' effect guarantees superior sealing integrity, even under the most demanding conditions.

 

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 innovative triple offset butterfly valve is engineered for ultimate performance, ensuring a bi-directional bubble-tight shut-off. Its sophisticated geometry is designed such that the disc seal precisely engages with the body seat only upon final shut-off, eliminating any risk of rubbing or galling. This design creates a torque-generated resilient seal, enhancing the 'wedging' effect for consistent and reliable seal contact across all conditions.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis, enabling comprehensive sealing contact around the entire circumference of the seat, ensuring optimal performance and reliability.
Offset 2 - A masterful design choice, the shaft's centerline is offset from both the pipe and valve, allowing for seamless, interference-free opening and closing, thus enhancing operational efficiency.
Offset 3 - With precision engineering, the seat cone axis is offset from the shaft centerline. This strategic design reduces friction during both closing and opening operations, achieving a consistently uniform compressive seal across the entire seat.

Valve Construction

 

Design of Triple-Eccentric: Crafted for the harshest environments, this design excels under extreme temperatures and pressures. It ensures minimal leakage with its frictionless operation and low torque requirement. The ingenious design leverages fluid force to enhance sealing performance, making it a marvel of engineering.

Integral Structure of Seat Ring and Body: The high-strength alloy surfacing of the sealing face guarantees unmatched reliability, ensuring that our valves deliver exceptional performance and longevity.
This design ensures the sealing face's resilience, extending the valve's lifespan and reducing the need for maintenance to nearly negligible levels.

Stepped Seal for Anti-Blowout: Our state-of-the-art design ensures safety with a high-strength integral stem, enhancing pressure drop allowances while maintaining superior operational security.

Innovative Stem and Disk Drive: Utilizing round pin offset, this design prevents stem strength deterioration from drilling. This innovation boosts the shearing strength and enhances both reliability and security.

Advanced Stem Sealing Design: Employing high-temperature resistant non-metallic materials, this design effectively prevents particle-laden fluids from entering bearings, thereby avoiding potential lock-ups and jams.

Belleville Springs for Dynamic Loading and Compensation: The packing system features dynamic compensation through Belleville springs, combined with expertly rolled and pressed packing box holes. The stem's precision processing minimizes emissions, fully aligning with the stringent TA-Luft standards.

Versatile Sealing Options: Choose from multi-layer composite, all-metal, or integral all-metal sealing options to suit any operational condition. The multi-layer composite seal offers flexibility, ensuring an optimal fit between the seat and seal rings, achieving ANSI VI leakage class standards.

Thrust Collar: This protective feature prevents particle or coking substance build-up, eliminating potential jamming. When flow reverses, it safeguards the stem from unintended displacement due to fluid forces, thus preventing larger leakages.

Convenient Maintenance: With high-precision components, our system allows for seamless
on-site adjustment and seal ring replacement, ensuring your operations remain smooth and uninterrupted.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands as a premier producer of control valves, adeptly integrating manufacturing, design, sales, and exceptional service under one esteemed banner. Positioned in the vibrant city of Qingdao, Shandong province, SNT is poised on an expansive 42,000 square meters, boasting cutting-edge workshops and state-of-the-art production equipment. As a beacon of high-tech innovation with proprietary intellectual property rights, SNT infuses advanced international management and production expertise. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in R&D, and 30% holding graduate or higher degrees, all driving the innovation engine. Through superior production management and pioneering technology, SNT delivers high-quality valves tailored for the petrochemical, oil, and coal chemical sectors. Proudly achieving nearly 100 billion in sales value in 2017, we lead with precision and excellence.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio boasts numerous national patents, highlighting our technological prowess. SNT expertly designs and manufactures an extensive range of valves adhering to international standards like ANSI, API, DIN, BS, and JIS. By harmonizing global valve excellence with independent R&D, we craft an array of superior valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T Three-eccentric Center Butterfly Valves, V Ball Valves, and more.
Our comprehensive valve offerings extend to High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves among others. Operational modalities include manual, power-driven, pneumatic, and hydraulic drive, with key materials comprising A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to an impressive 120", accommodating working pressures from ANSI 150# to 2500# and temperatures spanning -196ºC to 1100ºC, ensuring adaptability and resilience in diverse environments.

Leveraging sophisticated production technology management and an unwavering quality assurance system, SNT Valves have become trusted across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, among others. These partnerships underscore our commitment to excellence and reliability.

At SNT, we prioritize our clients' success, dedicating ourselves to unparalleled quality and brand distinction. Our robust quality assurance and comprehensive after-sales systems ensure enduring partnerships, as we collaborate with our clients to forge a prosperous future together.