Triple Offset Metal Seated Butterfly 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

^{SNT Machinery (Qingdao) Co., Ltd. boasts a distinctive design and cutting-edge processing technologies, backed by over a decade of intense innovation and craftsmanship in the butterfly valve sector. We excel in delivering robust solutions for a spectrum of challenging and harsh service environments. Our butterfly valves, celebrated for their formidable market edge, adhere to esteemed international standards such as ASME B16.34-2009, GB/T12221-1989, and AP1607-2009. This versatile product line is extensively utilized across various industries, including petroleum, chemical, light industry, pharmaceuticals, paper production, metallurgy, and rubber.}
The AOC-3812 series triple offset butterfly valve is engineered to offer a bi-directional, bubble-tight shut-off. Its sophisticated geometry guarantees that the sealing mechanism engages seamlessly,
ensuring that the disc seal makes contact with the body seat solely at the final shut-off position without any rubbing or galling. This results in a torque-driven,
resilient seal that is empowered by a sufficient "wedging" action to ensure optimal performance.

 

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 Triple Offset Metal Seated Butterfly Valve by SNT Machinery (Qingdao) Co., Ltd. is a marvel of engineering, meticulously crafted to provide unparalleled bi-directional bubble-tight shut-off. This innovative design ensures that the disc seal makes contact with the body seat exclusively at the final shut-off position, eliminating any rubbing or galling. This mechanism offers a torque-generated resilient seal, employing strategic 'wedging' to guarantee a uniform and robust seal contact across all interfaces.

The Triple Offset Geometry

Offset 1: Ingeniously designed, the shaft is offset behind the seat axis to facilitate a complete and comprehensive sealing contact encompassing the entire seat. This ensures maximum efficiency and performance.
Offset 2: The strategic offset of the shaft centerline from both the pipe and valve eliminates any interference during operation, allowing smooth and frictionless opening and closing of the valve.
Offset 3: By offsetting the seat cone axis from the shaft centerline, this design masterfully eliminates friction during the closing and opening processes. It achieves a uniform and compressive sealing force that envelops the entire seat, offering a seamless and durable performance.

Valve Construction

 

Design of Triple-Eccentric: This sophisticated design is tailored for extreme conditions, effortlessly handling both high temperatures and pressures. Engineered for excellence, it offers non-friction opening and closing with minimal torque requirements. Remarkably, as the fluid force intensifies, the sealing becomes even more effective.

Integral Structure of Seat Ring and Body: The sealing face is fortified with high-strength alloy, ensuring unparalleled reliability and endurance. This robust construction promises a near maintenance-free experience, significantly extending the service life.
of the sealing face, providing longevity and approaching non-maintenance requirements.

Stepped Sealed for Anti-Blowing Out: This innovative feature ensures security while the integral stem, crafted from high-strength materials, boosts pressure drop resistance.

Advanced Driving Method of Stem and Disk: Utilizing an offset of round pin, it prevents the weakening of stem strength due to drilling. This enhances the shearing strength of the round pin, further amplifying reliability and security.

Stem Sealing Design: Engineered with high-temperature resistant non-metallic materials, this sealing prevents particle-laden fluid from infiltrating the bearing, effectively avoiding lock-up or jamming.

Belleville Springs - Dynamic Loading and Compensation: The packing system is equipped with dynamic loading and compensation via Belleville springs. The precision-engineered packing box, through rolling and pressing, along with the meticulously processed stem, eliminates packing emissions to comply with the TA-Luft standard.

Versatile Sealing Options: Offering a selection that includes multi-layer composite seals, multi-layer all-metal seals, and integral all-metal seals, each tailored to specific service conditions. The multi-layer composite seal is particularly adaptable, ensuring optimal alignment between the seat and seal rings, thereby achieving ANSI VI leakage class compliance.

Thrust Collar Protection: The thrust collar effectively shields the stem, preventing particle or coking substance buildup in dead angles, which could cause jamming. In reverse flow, it secures the stem against rotational displacement due to fluid forces, mitigating the risk of significant leakage.

Convenient Maintenance: With precise component fabrication,
on-site regulation and seal ring replacement are seamless and efficient.
 

Production application

 

 

Company Profile

SNT Machinery (Qingdao) Co., Ltd. shines as an illustrious leader in control valve production, seamlessly blending the arts of manufacturing, design, sales, and service. With a strategic head start in Qingdao, Shandong Province, sprawling across an impressive 42,000m², our facility boasts state-of-the-art workshops and cutting-edge production equipment. As a beacon of high-tech innovation, we hold independent intellectual property rights and have infused advanced management and production expertise from global front-runners. Our dynamic team consists of over 150 dedicated professionals, with 15% committed to research and development, while 30% are graduates or hold higher degrees. This synergy of a high-caliber production management team and pioneering research and development propels us to manufacture top-tier valves extensively utilized in the petrochemical, oil, and coal chemical industries. In 2017, our sales values soared to an astounding near 100 billion.

SNT Machinery proudly holds the prestigious TS Special Equipment Manufacturing Certificate alongside ISO 9001 certification, further endorsed by the net qualification certifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With a portfolio enriched by numerous National Patents, we excel in designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. Merging insights from renowned valve designs globally with our independent research and development, we masterfully craft an extensive array of valves. Our repertoire includes 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.
V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, Cryogenic Valves, and more form our illustrious catalogue. Our driving mechanisms encompass manual operation, power-driven, pneumatic, and hydraulic drive systems. The main components are meticulously crafted from premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", accommodating working pressures of ANSI 150# to 2500#, and enduring temperatures from -196ºC to 1100ºC.

Leveraging cutting-edge production technology management and a robust quality assurance system, SNT Valves have become indispensable across diverse industries, including petrochemical, oil, steel & iron, paper manufacturing, and power generation sectors. Our esteemed clientele encompasses SINOPEC QILU, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, SINOPEC Qingdao Refinery, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, SINOPEC Changling, and Jinan branches, among others.

Placing our customers' prosperity at the forefront, we are unwaveringly devoted to crafting exceptional quality and esteemed branding. Our robust quality assurance and after-sales systems stand as a testament to our commitment, ensuring that SNT valves forge enduring partnerships with our clients, collectively paving the path to mutual success and prosperity.