ANSI Class 150-600 Triple Offset Metal Seated Valves

• 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 distinctive design, cutting-edge processing technology, and more than a decade of dedicated expertise in the exploration and manufacturing of butterfly valves, SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of delivering exceptional valve solutions. We provide robust and reliable solutions for a myriad of complex and demanding service conditions. Our butterfly valves boast remarkable market competitiveness, their design aligning with prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. This comprehensive series of products finds extensive applications across various industries, including petroleum, chemical, light industry, pharmaceuticals, paper manufacturing, metallurgy, and the rubber industry.
The AOC-3812 series triple offset butterfly valve is engineered to deliver a bi-directional bubble-tight shut-off. This innovative design ensures that
the disc seal makes contact with the body seat solely at the final shut-off position, thereby eliminating any rubbing or galling. This mechanism provides a torque-
induced resilient seal, creating a secure 'wedging' effect that ensures unmatched reliability and 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

SNT's triple offset butterfly valve is engineered to deliver flawless bi-directional bubble tight shut-off. With a unique geometry, our design ensures that the disc seal only makes contact with the body seat at the final shut-off position, eliminating any risk of rubbing or galling. This advanced mechanism generates a torque-induced resilient seal, augmented by a 'wedging' action, guaranteeing consistent and uniform seal contact for peak performance.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis, facilitating complete sealing contact around the entire seat, ensuring maximum efficiency and reliability.
Offset 2 - With the centerline of the shaft strategically offset from both the pipe and the valve, this design ensures interference-free opening and closing, enhancing operational smoothness and precision.
Offset 3 - The seat cone's axis is offset from the shaft centerline, expertly eliminating friction during operation. This ensures seamless closing and opening, while achieving a uniform compressive seal across the entire seat, elevating the valve's efficacy and longevity.

Valve Construction

 

Innovative Triple-Eccentric Design: Perfectly crafted for the most demanding service conditions, our design excels under high temperature and pressure, while ensuring minimal leakage. Experience seamless valve operation with non-friction and low torque features. The greater the fluid force, the more impeccable the seal.

Robust Integral Seat Ring Structure: Our seat ring and body boast an integral structure, with a sealing face surfaced by high-strength alloy. This guarantees exceptional reliability.
of the sealing face, significantly extending service life, and drastically reducing maintenance demands.

Stepped Sealed for Anti-Blowout Assurance: Our design ensures uncompromised security while the high-strength integral stem optimizes pressure drop management.

Advanced Stem and Disk Drive Method: Employing an offset round pin avoids reductions in stem strength. This enhances the shearing strength of the pin, improving overall reliability and security.

Superior Stem Sealing Design: Utilizing high-temperature resistant non-metallic materials, our stem sealing system prevents particle-laden fluids from entering bearings, thus avoiding lock-ups and jams.

Belleville Springs for Dynamic Loading and Compensation: The packing system integrates dynamic loading with Belleville springs. The packing box's rolling and pressing technology, combined with precision-processed stems, eliminate emissions to meet TA-Luft standards.

Diverse Sealing Options: Choose from multi-layer composite, multi-layer all-metal, or integral all-metal sealed systems, customized for diverse service conditions. Multi-layer composite sealing offers flexibility, ensuring optimal fit between seat and sea rings, achieving ANSI VI leakage class.

Protective Thrust Collar: The stem's thrust collar prevents particle accumulation in dead angles between stem and body, averting jams. With reverse flow, it stabilizes the stem against fluid-induced rotational displacement, mitigating large leaks.

Effortless Maintenance: Benefit from high precision in parts for on-
site regulation and smooth seal ring replacement, ensuring convenience and enduring performance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a leading force in the control valve industry, seamlessly integrating manufacturing, design, sales, and service. With an exceptional foundation and rapid growth trajectory, SNT has established itself in the dynamic city of Qingdao, Shandong province, sprawling over 42,000 m² of state-of-the-art production facilities. Recognized as a high-tech enterprise, SNT holds independent intellectual property rights and imports cutting-edge management and production methodologies. The company boasts a dedicated workforce of over 150 employees, with 15% specializing in R&D and 30% possessing graduate-level or higher qualifications. Leveraging a robust production management team and innovative technology R&D, SNT manufactures top-tier valves extensively applied in petrochemical, oil, and coal industries, achieving impressive sales nearing 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate, is ISO 9001 certified, and has secured net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents, SNT designs and manufactures a full spectrum of valves in compliance with ANSI, API, DIN, BS, and JIS standards. By integrating the strengths of renowned global valves and through independent R&D, SNT has perfected manufacturing capabilities for a diverse range of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
SNT's valve line-up comprises V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, and Self-operated Control Valves, as well as Cryogenic Valves. Our valves support various drive forms such as manual, power-driven, pneumatic, and hydraulic. Core materials include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures spanning ANSI 150# to 2500#, and operating temperatures from -196ºC to 1100ºC.

Exploiting advanced production technology and a stringent quality assurance system, SNT valves are indispensable across petrochemical, oil, steel & iron, paper manufacturing, and power station sectors. Esteemed clientele include SINOPEC branches in QILU, Qingdao, Changling, and Jinan, CNOOC Huizhou Refinery, and PETROCHINA branches in Guangxi and Ningxia.

Placing customer profitability at the forefront, SNT is dedicated to crafting superior quality and enhancing brand reputation. Our comprehensive quality assurance and after-sales services ensure that SNT valves foster prosperity alongside our valued customers.