Metal Seated 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. showcases its expertise in the realm of Metal Seated Butterfly Valves, with unmatched design acumen and state-of-the-art processing techniques. With over a decade of dedicated experience in crafting these valves, SNT emerges as a leader in providing tailor-made solutions for the most challenging and demanding service conditions. Our butterfly valves boast formidable market competitiveness, adhering to prestigious international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This versatile product line finds itself indispensable across a variety of industries including petroleum, chemical, light industry, pharmaceuticals, paper manufacturing, metallurgy, and rubber processing.
The AOC-3812 series triple offset butterfly valve is a marvel of engineering, designed to deliver a bi-directional, bubble-tight shut-off. Its innovative geometry is a testament to precision and quality, ensuring unparalleled performance.
This cutting-edge design guarantees that the disc seal makes contact with the body seat solely at the final shut-off point. This unique feature eliminates rubbing and galling, while providing a torque-generating resilient seal that enhances durability and efficiency.
The valve's sophisticated 'wedging' mechanism ensures a faultless seal, offering reliable performance and peace of mind in even the most demanding applications.}

 

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 ingeniously designed to deliver superior performance with a bi-directional bubble-tight shut-off. This precise engineering ensures that the disc seal engages with the body seat exclusively at the final shut-off point, eliminating any potential for rubbing or galling. This innovative approach generates a torque-driven, resilient seal that expertly utilizes 'wedging' to achieve a uniformly secure seal contact.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis, allowing for impeccable sealing contact around the entirety of the seat. This thoughtful arrangement ensures a flawless seal every time.
Offset 2 - With the shaft centerline smartly offset from the pipe and valve, this configuration guarantees an interference-free opening and closing experience for the valve, enhancing operational efficiency.
Offset 3 - The seat cone axis is strategically offset from the shaft centerline. This brilliant design choice eradicates friction during both closing and opening operations, ensuring a consistent and comprehensive compressive seal across the entire seat, enhancing durability and performance.

Valve Construction

 

Ingenious Design of Triple-Eccentric: Perfectly suited for extreme conditions-be it high temperatures or immense pressure-this design ensures minimal leakage. During the opening or closing phases, it boasts a non-friction operation and requires low torque. Remarkably, the greater the fluid force, the tighter the seal becomes, enhancing performance.

Robust Integral Structure of Seat Ring and Body: The sealing face, fortified with a high-strength alloy, guarantees unmatched reliability.
This enhances the durability of the sealing face, significantly extending its service life, thereby minimizing maintenance needs.

Advanced Stepped Sealing for Anti-Blowout: This design ensures unparalleled security. The solid, high-strength integral stem significantly boosts allowable pressure drops, providing peace of mind.

Innovative Stem and Disk Drive Method with Offset Round Pin: This clever technique prevents strength reduction in the stem due to drilling. It enhances the shearing strength of the round pin, increasing both reliability and safety.

State-of-the-Art Stem Sealing Design: Utilizing high-temperature resistant, non-metallic material, this sealing prevents particle-laden fluids from entering the bearing, thus averting lock or jam situations.

Belleville Springs for Dynamic Loading and Compensation: The packing system employs the dynamic capabilities of Belleville springs for load and compensation. The meticulously rolled and pressed packing box, along with the expertly processed stem, virtually eliminates packing emission to comply with the stringent TA-Luft standards.

Diverse Sealing Options Available: These include multi-layer composite, all-metal sealed, and integral all-metal sealed configurations. Selection is tailored to specific service conditions. The flexibility of the multi-layer composite seal ensures an optimal fit between the seat ring and seal ring, achieving the ANSI VI leakage class standard effortlessly.

Thrust Collar for Stem Protection: This essential feature prevents the dead angle between the stem and body from being clogged with particles or coking substances, thereby averting stem jamming. In reverse flow conditions, it prevents rotational displacement of the stem due to fluid force, significantly reducing leakage risk.

Effortless Maintenance: High-precision parts and components allow on-
site regulation and seamless replacement of seal rings, simplifying maintenance procedures.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd is a distinguished leader in the realm of control valves, seamlessly unifying manufacturing, design, sales, and services. Strategically nestled in the vibrant city of Qingdao, Shandong Province, SNT boasts an impressive 42,000m2 facility, complete with state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, we proudly hold independent intellectual property rights, complemented by sophisticated management and production expertise from global pioneers. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in R&D and 30% holding advanced degrees. Leveraging a superior production management team and groundbreaking technological innovations, SNT excels in crafting a vast array of premium valves, pivotal to the petrochemical, oil, and coal chemical industries, achieving a remarkable sales turnover of nearly 100 billion RMB in 2017.

SNT is proud to hold the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation. Our credentials are further bolstered by the net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, along with numerous National Patents for our technological innovations. Our comprehensive valve design and manufacturing capabilities adhere to stringent ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of renowned global valve designs with our own pioneering R&D, we manufacture an extensive range of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves. Our commitment to excellence ensures we remain at the forefront of valve technology.
Our diverse portfolio includes 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 valves are available in manual, power-driven, pneumatic, and hydraulic drive forms. We utilize high-grade materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring durability and performance across specifications ranging from 1/2" to 120". With working pressures of ANSI 150#~2500# and operating temperatures spanning from -196ºC to 1100ºC, our products meet the most demanding industrial standards.

Thanks to our advanced production technology management and rigorous quality assurance system, SNT valves are indispensable across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes heavyweights like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and many more. Trust in our valves, and join the ranks of leading industry players who rely on SNT's unmatched quality and reliability.

At SNT, we prioritize our users' success, dedicating ourselves to building outstanding quality and a prestigious brand. Our impeccable quality assurance and after-sales service systems ensure that SNT valves not only meet but exceed customer expectations, fostering collaboration and prosperity hand in hand with our valued partners.