Triple Offset Butterfly Valves DN80 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

^{The company boasts a unique design and advanced processing techniques, backed by over a decade of expertise in the exploration and production of butterfly valves. We offer comprehensive solutions tailored for a myriad of complex and demanding service environments. Our butterfly valves are a beacon of market competitiveness, with designs that adhere strictly to international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This exceptional series is extensively utilized across diverse sectors, including petroleum, chemical, light industry, pharmaceuticals, paper making, metallurgy, and the rubber industry, showcasing unparalleled versatility.}
The AOC-3812 series triple offset butterfly valve delivers a bi-directional, bubble-tight shut-off, embodying precision and durability. Its ingenious geometry ensures...
...that the disc seal engages the body seat solely at the ultimate shut-off position. This design avoids any rubbing or galling, leading to a torque-free experience...
...with a resilient seal augmented by a 'wedging' effect that guarantees unwavering performance.

 

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 a marvel of engineering, providing an impeccable bi-directional bubble-tight shut-off. This sophisticated design guarantees that the disc seal only makes contact with the body seat at the ultimate shut-off position, eliminating any potential rubbing or galling. This advanced mechanism delivers a torque-generated resilient seal, utilizing an innovative 'wedging' effect to ensure a consistently uniform seal contact, enhancing durability and reliability.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis. This strategic placement allows for complete sealing contact around the entire seat, ensuring exceptional sealing performance.
Offset 2 - In a testament to intelligent design, the shaft centerline is offset from both the pipe and valve, allowing for interference-free opening and closing. This design choice maximizes efficiency and operational smoothness.
Offset 3 - The seat cone axis is cleverly offset from the shaft centerline. This eliminates any friction during valve operations, facilitating smooth closing and opening, while achieving a uniform compressive seal around the entire seat. The result is optimal sealing integrity and performance.

Valve Construction

 

Ingeniously crafted with a triple-eccentric design, this valve is engineered to thrive in the most demanding environments. Impeccably suited for high-temperature and high-pressure service conditions, it ensures minimal leakage. Its unique design facilitates a smooth, frictionless operation with low torque requirements. Remarkably, the greater the fluid force exerted, the more robust and secure the seal becomes.

The valve boasts a seat ring and body constructed as an integral unit. The sealing face is meticulously surfaced with high-strength alloy, ensuring unwavering reliability.
This enhancement not only bolsters the integrity of the sealing face but also extends the service life, nearing a state of minimal maintenance.

Engineered with a stepped seal to prevent blowout, it guarantees safety. Additionally, the high-strength integral stem enhances allowable pressure drops, elevating performance.

The offset round pin design between the stem and disk is a hallmark of this valve's ingenuity. It prevents the weakening of the stem due to drilling, thereby enhancing the shearing strength of the round pin, bolstering both reliability and safety.

Stem sealing is thoughtfully engineered with high-temperature resistant non-metallic materials. This prevents particles-laden fluids from invading the bearing, thus avoiding lock-up or jamming issues.

With Belleville springs providing dynamic loading and compensation, the packing system is state-of-the-art. The packing box is rolled and pressed, and the stem meticulously processed to virtually eliminate packing emissions, meeting the stringent TA-Luft standards.

A variety of sealing options are available, including multi-layer composite, multi-layer all-metal, and integral all-metal seals. These choices cater to diverse service conditions, ensuring the perfect fit. The multi-layer composite seal stands out for its flexibility, achieving an excellent fit between the seat ring and sea ring, thus meeting ANSI VI leakage class standards.

The stem is protected by a thrust collar, ingeniously designed to prevent particle or coking accumulation in the dead angle area between the stem and body, thereby averting jamming. In reverse flow, it prevents the stem from moving due to fluid force, mitigating potential leakage.

Convenience in Maintenance: Exceptional precision in parts and components greatly enhances ease of
on-site regulation and replacement of seal rings, ensuring seamless and hassle-free maintenance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of control valve production, seamlessly integrating manufacturing, design, sales, and service. Positioned for swift growth, SNT is nestled in the picturesque Qingdao, Shandong province, sprawling over an impressive 42,000 square meters. Our state-of-the-art facilities boast cutting-edge workshops and production equipment. We're proud to be a high-tech enterprise, holding independent intellectual property rights and infused with world-class management and production expertise. Employing over 150 dedicated professionals, our R&D specialists make up 15% of the workforce, while 30% hold graduate degrees or higher. With a robust production management team and pioneering tech R&D, we manufacture vast quantities of superior quality valves tailored for the petrochemical, oil, and coal chemical sectors. In 2017, our sales value neared an astounding 100 billion.

SNT is a proud holder of the TS special equipment manufacturing certificate and ISO 9001 certification, alongside the prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We boast national patents across multiple technologies. Our expertise encompasses designing and manufacturing an entire spectrum of valves per ANSI, API, DIN, BS, and JIS standards. Drawing upon the strengths of globally renowned valves and our innovative R&D, we produce an extensive range 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 diverse valve portfolio includes V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more. Drive mechanisms span manual, electric, pneumatic, and hydraulic systems. Key component materials include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring unmatched durability. Specifications range from 1/2" to 120", with working pressures of ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

With cutting-edge production technology and a rigorous quality assurance system, SNT Valves are the trusted choice across petrochemical, oil, steel, paper, and power industries. Esteemed clients include SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and many more. We proudly serve SINOPEC Changling, Jinan, and beyond.

Prioritizing customer profitability, we are dedicated to crafting excellence in quality and building a prestigious brand. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves forge prosperous partnerships with all our valued clients.