Triple Offset Butterfly Valves, Metal Seated, 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. stands as a beacon of innovation and expertise, boasting a distinctive design, cutting-edge processing, and over a decade of experience in the exploration and manufacturing of butterfly valves. We offer tailored solutions for a broad spectrum of complex and challenging service conditions. Our butterfly valves shine with unparalleled market competitiveness, adhering rigorously to international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. These exceptional products find diverse applications across sectors, including petroleum, chemical, light industry, pharmaceuticals, paper manufacturing, metallurgy, and the rubber industry.}
The AOC-3812 series triple offset butterfly valve is engineered for excellence, delivering a bi-directional bubble-tight shut-off. Its innovative geometry guarantees unparalleled sealing integrity,
where the disc seal makes contact with the body seat solely at the final shut-off position, eliminating rubbing or galling. This ensures a torque-driven,
resilient seal enhanced with strategic 'wedging,' ensuring optimal reliability and performance under 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

The SNT triple offset butterfly valve is an engineering marvel designed to offer superior bi-directional bubble-tight shut-off. This advanced geometry ensures that the disc seal makes contact with the body seat only at the final shut-off position, eliminating any risk of rubbing or galling. The result is a torque-generated resilient seal, strategically 'wedging' to guarantee a uniform seal contact that assures optimal performance and reliability.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is offset behind the seat axis. This unique configuration facilitates a complete sealing contact around the entire seat, ensuring exceptional sealing effectiveness.
Offset 2 - With precision engineering, the shaft centerline is offset from both the pipe and valve. This design innovation ensures interference-free operation, enabling smooth and efficient opening and closing of the valve.
Offset 3 - The seat cone axis is strategically offset from the shaft centerline. This eliminates friction during both closing and opening, achieving a uniform compressive seal around the entire seat, and ensuring the highest standards of sealing integrity.

Valve Construction

 

Triple-offset design: Specially crafted for extreme conditions of high temperature and pressure, this design ensures minimal leakage. The valve operates with non-friction and low torque, enhancing sealing efficiency as fluid force increases.

Seat ring and body integral structure: The sealing face is enhanced with a high-strength alloy, ensuring exceptional reliability.
The durability of the sealing face is maximized, resulting in an extended service life, with maintenance requirements nearly eliminated.

Anti-blowout stepped seal: Guarantees safety while the integral stem, made from high-strength material, boosts allowable pressure drops.

Stem and disk drive with round pin offset: This method prevents strength reduction from drilling and enhances the round pin's shearing strength, ensuring reliability and safety.

Stem sealing design: Made from high-temperature resistant non-metallic material, it safeguards against particle entry into the bearing, preventing lock or jam.

Belleville springs - dynamic loading and compensation: The packing system, enhanced by dynamic loading and Belleville springs, features a precisely rolled packing box hole and processed stem, eliminating emissions to meet the TA-Luft standard.

Diverse sealing options: Includes multi-layer composite, multi-layer all-metal, and integral all-metal seals. These choices are tailored to different service conditions. Multi-layer composite seals offer flexibility and optimal fitting between seat and sea rings, meeting ANSI VI leakage specifications.

Thrust collar protection: Prevents dead angle particle or coking substance accumulation between stem and body, avoiding stem jamming. In reverse flow, it prevents stem displacement due to fluid force, minimizing large leaks.

Effortless maintenance: High precision manufacturing ensures parts and components allow for on-
site regulation and easy replacement of seal rings.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands as a pioneering leader in the production of control valves, blending manufacturing prowess, cutting-edge design, comprehensive sales, and exceptional services into a seamless operation. Strategically situated in the vibrant city of Qingdao, Shandong province, SNT boasts a sprawling facility of 42,000 square meters, replete with modern workshops and state-of-the-art production equipment. As a high-tech enterprise, SNT is fortified by independent intellectual property rights and leverages imported, advanced management and production experience. With a dedicated workforce of over 150 employees, 15% of whom are R&D specialists, and 30% holding advanced degrees, the company thrives on its high-caliber production management team and innovative technology research and development. This synergy enables SNT to produce a vast array of high-quality valves destined for the petrochemical, oil, and coal chemical industries, achieving a sales value nearing 100 billion in the year 2017.

SNT has proudly obtained the TS special equipment manufacturing certificate and ISO 9001 accreditation, while also securing network qualification certificates from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Additionally, SNT has been awarded numerous national patents for its technological innovations. We possess the capability to design and manufacture an extensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By integrating the superior qualities of renowned valves worldwide with our independent R&D, SNT now produces a comprehensive spectrum 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.
We also specialize in V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. Our diverse range of driving forms includes manual operation, power-driven, pneumatic, and hydraulic drives. The primary materials utilized in our valves are A216 WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, available in specifications from 1/2" to 120", with working pressures ranging from ANSI 150# to 2500#, and capable of operating within a temperature span of -196ºC to 1100ºC.

Harnessing advanced production technology, meticulous management, and a robust quality assurance system, SNT Valves have become integral to a myriad of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes prestigious entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many more.

At SNT, we prioritize our customers' profitability, dedicating ourselves to establishing a reputation for exceptional quality and a trusted brand. Our impeccable quality assurance and after-sales support systems ensure that SNT valves not only meet but exceed customer expectations, fostering a partnership that thrives on mutual success and prosperity.