Triple Offset Metal Seated Valves 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

^{At SNT Machinery (Qingdao) Co., Ltd., we pride ourselves on our unique designs, advanced processing techniques, and over a decade of expertise in the realm of butterfly valve manufacturing. We offer innovative solutions for the most complex and demanding service conditions, ensuring our butterfly valves boast impressive market competitiveness. Our designs are crafted to meet esteemed international standards such as ASME B16.34-2009, GB/T12221 -1989, and AP1607-2009. Our versatile valves find extensive applications across diverse sectors including petroleum, chemical, light industries, pharmaceuticals, papermaking, metallurgy, and the rubber industry.}
The AOC-3812 Series Triple Offset Butterfly Valve represents a pinnacle of innovation with its bi-directional, bubble-tight shut-off capability. The sophisticated geometry ensures seamless performance,
where the disc seal meets the body seat precisely at the final shut-off position, free from any rubbing or galling. This design offers a torque-generated
resilient seal with an optimal degree of 'wedging' to guarantee a secure and reliable closure every time.

 

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 revolutionary SNT triple offset butterfly valve ensures a bi-directional, bubble-tight shut-off that is unparalleled in the industry. This sophisticated design guarantees that the disc seal makes contact with the body seat only at the ultimate shut-off point, avoiding any rubbing or galling. This innovation provides a torque-generated, resilient seal that applies just the right amount of 'wedging' to deliver a consistent and reliable seal contact every time.

The Ingenious Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is strategically offset behind the seat axis. This allows for complete and uninterrupted sealing contact around the entire seat, ensuring maximum sealing efficiency.
Offset 2 - At the heart of this design, the shaft centerline is meticulously offset from both the pipe and the valve. This sophisticated alignment allows for interference-free opening and closing of the valve, enhancing operational smoothness.
Offset 3 - In a masterstroke of design, the seat cone axis is offset from the shaft centerline. This precision engineering eliminates friction during both closing and opening, achieving a uniform compressive seal around the entire seat, thereby enhancing durability and performance.

Valve Construction

 

Ingenious Design of Triple-Eccentric: Perfectly suited for the most demanding service conditions characterized by high temperature and pressure, combined with minimal leakage. During the valve's opening or closing phases, it proudly showcases frictionless operation and requires remarkably low torque. The greater the fluid force, the more impeccable the sealing becomes.

Robust Integral Structure: The seat ring and body are amalgamated, with the sealing face skillfully surfaced using a high-strength alloy, ensuring exceptional reliability
of the sealing face and significantly extending its service life, approaching a state of near non-maintenance.

Stepped Seal for Anti-Blowout Assurance: This design feature guarantees security while the integral stem, crafted from high-strength material, enhances the allowable pressure drops, elevating safety and performance.

Innovative Driving Method: Utilizing the offset of a round pin in the stem and disk mechanism, it prevents the reduction of stem strength from drilling. This not only enhances the shearing strength of the round pin but also elevates reliability and security.

Advanced Stem Sealing Design: The stem sealing, crafted from high-temperature resistant non-metallic material, effectively prevents fluid with particles from infiltrating the bearing, thus avoiding potential lock or jam situations.

Dynamic Belleville Springs Loading and Compensation: The packing system incorporates dynamic loading and compensation through Belleville springs. The packing box hole is meticulously rolled and pressed, while the stem is expertly processed to virtually eliminate packing emission, complying with the stringent TA-Luft standard.

Versatile Sealing Options: Offering a range of sealing choices, including multi-layer composite sealed, multi-layer all-metal sealed, and integral all-metal sealed options. Selections are made based on varying service conditions. The multi-layer composite sealed option provides flexibility, ensuring an optimal fit between the seat ring and sea ring, fulfilling ANSI VI leakage class standards.

Protective Thrust Collar: This stem-protecting thrust collar prevents the accumulation of particles or coking substances in the dead angle area between the stem and body, which could cause jamming. When flowing in reverse, it prevents the stem from rotational displacement due to fluid force, thus averting increased leakage.

Effortless Maintenance: The high precision of parts and components facilitates on-site
adjustment and replacement of seal rings, ensuring seamless operation and maintenance.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. is a distinguished producer of control valves, seamlessly integrating manufacturing, design, sales, and services. With a robust foundation and rapid development, SNT is strategically located in the vibrant city of Qingdao, Shandong Province, sprawling over an impressive 42,000 square meters. Equipped with cutting-edge workshops and state-of-the-art production facilities, we are a high-tech enterprise endowed with independent intellectual property rights and have adopted sophisticated international management and production methodologies. Our dedicated team comprises over 150 skilled workers, with R&D specialists making up 15% and employees holding graduate or higher degrees representing 30%. Driven by a top-notch production management team and pioneering technology research and development, we produce extensive volumes of superior quality valves for the petrochemical, oil, and coal chemical sectors. Our sales achieved a remarkable value of nearly 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, alongside prestigious net qualification certificates from giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We have amassed numerous national patents for our technological innovations. Our capabilities encompass the design and manufacture of a comprehensive array of valves adhering to ANSI, API, DIN, BS, and JIS standards. By synthesizing global valve technologies and leveraging our proprietary research and development, we produce a diverse 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 product line also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. These valves are available with various driving options, including manual, power-driven, pneumatic, and hydraulic drives. Key components are crafted from materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ensuring durability and reliability. Specifications range from 1/2" to a remarkable 120", with working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.

With our advanced production technology management and stringent quality assurance systems, SNT Valves have gained widespread application across industries such as petrochemical, oil, steel and iron, paper manufacturing, and power stations. Our esteemed clientele includes prestigious names like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others, reflecting our commitment to excellence and reliability.

At SNT, we prioritize the profitability and success of our clients, dedicating ourselves to crafting unparalleled quality and fostering a trusted brand. Our impeccable quality assurance and comprehensive after-sales services ensure that SNT valves forge strong partnerships with customers, paving the way to shared prosperity and success.