Triple Offset Metal Seated Valves Body Size 3′′-24′′

• 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 distinctive designs and state-of-the-art processing techniques, backed by over a decade of expertise in the innovation and production of butterfly valves. We are equipped to deliver tailored solutions for all varieties of challenging and demanding service environments. Our butterfly valves boast exceptional market competitiveness, adhering to esteemed international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. This versatile series finds its applications across diverse industries including petroleum, chemical, light industry, pharmaceuticals, papermaking, metallurgy, and the rubber sector.}
The AOC-3812 series triple offset butterfly valve from SNT offers an unparalleled bi-directional bubble-tight shut-off. This advanced geometric design ensures
that the disc seal engages the body's seat exclusively at the final shut-off point, eliminating any possibility of rubbing or galling. This feature is paired with a torque-j
enabled resilient seal, providing ample 'wedging' action to ensure a secure and reliable closure.

 

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 engineered to deliver an exceptional bi-directional bubble tight shut-off. Its innovative design ensures that the disc seal makes contact with the body seat only at the very last moment of the shut-off position, avoiding any rubbing or galling. This sophisticated mechanism delivers a resilient seal, which is torque-generated and creates a 'wedging' effect, thus guaranteeing consistent and uniform seal contact every time.

The Triple Offset Geometry

Offset 1 - Designed for superior performance, the shaft is strategically positioned offset behind the seat axis. This unique placement allows for complete sealing contact around the entire seat, enhancing reliability.
Offset 2 - With precision engineering, the shaft centerline is offset from both the pipe and valve. This configuration ensures an interference-free experience, facilitating smooth and effortless opening and closing of the valve.
Offset 3 - Ingeniously crafted, the seat cone axis is offset from the shaft centerline. This alignment minimizes friction during the closing and opening processes, achieving a consistent and compressive seal around the entire seat, ensuring optimal performance and durability.

Valve Construction

 

Design of Triple-Eccentric: Tailored for extreme service environments, this design excels under high temperature and pressure, ensuring minimal leakage. The non-friction and low torque during operation enhance its efficiency, and the sealing improves with increased fluid force.

Seat Ring and Body Integral Structure: Featuring a sealing face surfaced with high-strength alloy, this construction ensures flawless reliability.
This robust sealing face extends service life, reducing the need for maintenance to near elimination.

Stepped Seal for Anti-Blowout: Guarantees security while the integral stem crafted from high-strength materials enhances allowable pressure drops.

Advanced Stem and Disk Driving Method: The offset round pin design prevents stem strength reduction from drilling, boosting shearing strength, reliability, and security.

High-Temperature Stem Sealing Design: Utilizes non-metallic materials to block particle-laden fluid from entering the bearing, thus preventing lockups and jams.

Belleville Springs - Dynamic Loading and Compensation: Employing Belleville springs, the packing system offers dynamic loading and compensation. The packing box is meticulously rolled and pressed, while the stem undergoes precision processing to curb emissions in line with TA-Luft standards.

Diverse Sealing Options: Choose from multi-layer composite, multi-layer all-metal, or integral all-metal seals. Each option caters to specific service conditions, with the multi-layer composite seal providing enhanced flexibility and fit, meeting ANSI VI leakage standards.

Thrust Collar Protection: Shields the stem from particle or coking substance accumulation, preventing jams. In reverse flow, it forestalls rational displacement due to fluid force, minimizing large leaks.

Effortless Maintenance: High precision components facilitate seamless
on-site regulation and easy replacement of seal rings.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands as a beacon of innovation in control valve production, seamlessly integrating design, manufacturing, sales, and service into a singular, efficient operation. Strategically nestled in the thriving city of Qingdao, Shandong province, our expansive 42,000m2 facility is a testament to cutting-edge industrial prowess. As a proud high-tech enterprise, we boast independent intellectual property rights and leverage globally sourced management and production expertise. Our dynamic team of over 150 employees is bolstered by a robust R&D division, with an impressive 15% being specialists and 30% holding graduate or higher degrees. This talented cohort drives the creation of superior valves, pivotal to the petrochemical, oil, and coal chemical sectors. Our relentless pursuit of excellence translated into an astounding sales value approaching 100 billion in 2017.

SNT's esteemed status is underscored by our TS special equipment manufacturing certificate and ISO 9001 accreditation. Furthermore, we proudly possess the net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is evidenced by numerous National Patents, and our product design aligns with globally recognized standards including ANSI, API, DIN, BS, and JIS. We've ingeniously synthesized the merits of world-renowned valves with our own innovative R&D efforts. Our diverse valve portfolio encompasses 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 extensive valve offerings further include V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, and Self-operated Control Valves, extending even to Cryogenic Valves. These are available with a variety of driving forms, including manual, power-driven, pneumatic, and hydraulic options. Constructed from premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, our valves cater to specifications from 1/2" to 120", withstanding pressures from ANSI 150# to 2500#, and operating across temperature ranges of -196ºC to 1100ºC.

SNT Valves are synonymous with reliability and superior performance, utilized across diverse industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele includes industry titans like SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, to name a few. Our unwavering commitment to excellence ensures our products exceed expectations in every application.

At SNT Machinery, we prioritize our client's success, dedicating ourselves to crafting exceptional quality and cultivating a distinguished brand. Our comprehensive quality assurance and after-sales systems foster lasting partnerships with our customers, paving the way for mutual prosperity and shared success.