Metal Seated Butterfly Valves Triple Offset Body Rating

• 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 in the realm of butterfly valves. With a pioneering design and cutting-edge processing techniques, coupled with over a decade of dedicated experience, we specialize in crafting solutions tailored for even the most challenging and demanding service conditions. Our Metal Seated Butterfly Valves Triple Offset Body Rating series boasts remarkable market competitiveness and adheres to international standards such as ASME B16.34-2009, GB/T12221-1989, and API 607-2009. These versatile products find their application across a multitude of industries including petroleum, chemical, light industry, pharmaceuticals, paper making, metallurgy, and rubber.
The AOC-3812 series triple offset butterfly valve is expertly engineered to provide a bi-directional, bubble-tight shut-off that is second to none. Its unique geometry ensures,
that the disc seal engages with the body seat exclusively at the final shut-off position, eliminating friction and wear to deliver a reliable torque-driven performance. generated resilient seal with a robust 'wedging' action that guarantees}

 

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 exceptional performance with its bi-directional, bubble-tight shut-off feature. This sophisticated geometry is designed so that the disc seal precisely interacts with the body seat exclusively at the final shut-off stage. This prevents any rubbing or galling, enabling the valve to generate a resilient seal through torque. The 'wedging' mechanism ensures a consistent and reliable seal contact, offering superior efficiency and sealing capabilities.

The Triple Offset Geometry

Offset 1 - Ingeniously designed, the shaft is positioned behind the seat axis. This ensures comprehensive sealing contact around the entire seat, enhancing the valve's functionality.
Offset 2 - With the shaft centerline strategically offset from both the pipe and valve, this innovative design allows for interference-free opening and closing, making the operational transitions smooth and seamless.
Offset 3 - By offsetting the seat cone axis from the shaft centerline, this design effectively eliminates any friction during the closing and opening phases. This ensures a uniform and compressive seal around the entire seat, optimizing the valve's performance and longevity.

Valve Construction

 

Design of Triple-Eccentric: This cutting-edge design is specifically engineered to thrive under the most demanding conditions of high temperature and pressure. It ensures minimal leakage with a unique opening and closing mechanism characterized by non-friction and low torque. As the fluid force intensifies, the sealing capability is enhanced, promising unparalleled reliability.

Integral Structure of Seat Ring and Body: The sealing face, surfaced with high-strength alloy, is expertly crafted to deliver exceptional reliability.
This advanced construction greatly enhances the durability of the sealing face, extending its service life and often eliminating the need for maintenance.

Stepped Sealed for Anti-Blowing Out: Provides assured security while the high-strength integral stem material significantly boosts the allowable pressure drops.

Innovative Driving Method with Round Pin Offset: This design cleverly avoids the reduction in stem strength due to drilling. It enhances the shearing strength of the round pin, thereby boosting reliability and security.

Advanced Stem Sealing Design: Utilizing high-temperature resistant non-metallic material, this design prevents particle-laden fluids from infiltrating the bearing, effectively eliminating the risk of locking or jamming.

Belleville Springs - Dynamic Loading and Compensation: By employing Belleville springs for dynamic loading and compensation, the packing system efficiently reduces emissions. The modern processing of the stem and the innovative packing box design align with the stringent Ta-Luft standards.

Multiple Sealing Options: Featuring options like multi-layer composite sealed, multi-layer all-metal sealed, and integral all-metal sealed. These are tailored to meet various service conditions. The multi-layer composite sealed option is designed for flexibility, enhancing the fit between the seat ring and sea ring to achieve the stringent ANSI VI leakage class.

Thrust Collar: The stem-protecting thrust collar is engineered to prevent particle or coking substance accumulation that can lead to jamming. In reverse flow, it effectively stops stem displacement caused by fluid force, which could otherwise increase leakage.

Convenient Maintenance: Precision-engineered parts facilitate easy on-
site regulation and replacement of seal rings.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd stands as a beacon in the realm of control valve production, harmonizing the art of manufacturing, design, sales, and service into one seamless operation. Nestled in the picturesque city of Qingdao, Shandong province, our expansive 42,000m2 facility is outfitted with state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights, bolstered by globally sourced management and production expertise. Our dynamic team comprises over 150 skilled professionals, with 15% dedicated to R&D and 30% holding advanced degrees. Our commitment to excellence and innovation drives us to produce top-tier valves deployed across the petrochemical, oil, and coal chemical industries. In 2017, our sales soared to an impressive nearly 100 billion.

SNT Machinery has proudly obtained the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, along with the net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. We are a trailblazer in patented valve technology, designing and manufacturing an extensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. Our proprietary research and global insights enable us to produce a diverse array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and the innovative T Three-eccentric Center Butterfly Valves.
Our product range extends to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, with operation modes comprising manual, powered, pneumatic, and hydraulic drives. We ensure excellence with materials including A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, covering specifications from 1/2"~120" and accommodating working pressures from ANSI 150#~2500#, and temperatures ranging from -196ºC to 1100ºC.

Built on a foundation of advanced production technology and a robust quality assurance system, SNT Valves have earned the trust of industries spanning petrochemicals, oil, steel, iron, paper manufacturing, and power stations. Esteemed clients such as SINOPEC QILU, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, and many more rely on our superior products and services.

Placing customer success at the forefront, we at SNT are committed to forging a legacy of unmatched quality and brand excellence. Our comprehensive quality assurance and after-sales support systems ensure that SNT valves continue to collaborate with our esteemed clients, driving mutual growth and prosperity.