-20 Degree to 800 Degree/Four Lever Offset Shutoff Butterfly Valves, Meeting ASME B16.34 Standards with Carbon Steel Materials

• Customization: Available
• Media: Gas
• Driving Mode: Pneumatic
• Model NO.: AOC-430
• Connection Form: Flange
• Structure: Eccentric
• Seal Form: Supercharging Pressured Sealed
• Valve Stem: Link
• Work Pressure: High Pressure (10.0mpa< Pn <80.0mpa)
• Working Temperature: High Temperature (T>450°C)
• Material of Seal Surface: Soft Sealed
• Standard: Sil/API
• Application: Industrial Usage, Water Industrial Usage
• Design Standard: Ap1598API607asmeb16.34
• Standard Size: Nps12-160"(DN300-DN4000)
• Pressure Class: Pn2.5-Pn20/Asmeclass150
• Applicable Temperature: -20 Degree ~ 800 Degree
• Leakage Class: Ansib16.104VI, API598 No Leakage
• Body Material: Astma105A351CF8m/Special Alloy, etc.
• Valve Internals Material: A479-316/S2205/17-4pH
• Operation Mode: Manual, Pneumatic/Electric/Electro-Hydraulic, E
• Design: Anti-Static Design/Anti-Misoperation Design
• Sealing Structures: Multiple Sealing Structures for Option
• Valve Special Treatment: Sand Blasting Surface Treatment SA2.5
• Special Treatment: Painting After Surface Treatment
• Sealing Surface of Valve Plate: Hard Alloy Surfacing
• Valve Body Treatment: Sandblasted Inside and Outside
• Fire Protection Design: API607
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

About SNT Butterfly Valves

In recent years, as the industrial landscape evolves, there has been a remarkable improvement across sectors. Furthermore, the ever-growing emphasis on energy conservation and environmental protection has been transformative. policy.Consequently, the shutoff butterfly valve has increasingly become an essential component in the industry. In earlier technological advancements,thetri-eccentric butterfly valve relied on torque sealing, with the valve plate closing tightly through actuator torque for effective sealing. However, in specific scenarios (such as exposure to high-temperature catalytic flue gases, gases, sulfurous tail gases, and other media reaching up to 800°C), thermal expansion stress poses challenges. The valve may struggle to open, leading to severe issues such as tri-eccentric butterfly valve malfunction, thereby impedingindustrial production, resulting in substantial economic setbacks and potential safety incidents., leading to huge economic losses and even threatening safety.

SNT VALVE: Our expertise lies in the innovative research of high-temperature flue gas device butterfly valves.. To address these challenges, SNT VALVE has pioneered the introduction of four- stemeccentric butterfly valves as a superior alternative to the traditional tri -eccentric butterfly valves andtheindustry-standard erationbutterfly valves, marking a first in our industry. We have effectively resolved long-standing issues, securing two national patents: a four- stemeccentric butterfly valve (patent No. : ZL201520326489.1) and a catalytic device equipped with a four-stem eccentric butterfly valve (patentNo. : ZL201921719624.3). We have also partnered with the China Petroleum and Chemical Industry Federationto conduct product evaluations, in collaboration with Changzhou University , whichhas been recognizedas a leader in domestic innovation.

<sup>Four-link Eccentric Butterfly Valve Application: The AOC-4000 series, crafted by SNT, excels as a specialized regulating and shut-off valve for unique conditions.

The AOC-4000 series four-link eccentric butterfly valve by SNT has been meticulously designed for widespread use, catering to both regulation and shut-off needs in challenging environments.
Introducing the revolutionary AOC-4000 series four-link eccentric butterfly valve, a sophisticated solution crafted for demanding applications requiring high-temperature resilience, accommodating large diameters, and ensuring efficient high-flow operations. It's engineered for scenarios that demand minimal pressure drops and exceptional sealing capabilities, achieving both low and zero-leakage performance. This marvel of engineering boasts superior planar sealing proficiency, adept at thwarting valve jamming under intense thermal conditions. Its strength lies in its rapid actuation, precision in adjustment, and unwavering reliability in sealing, rendering it ideal for the meticulous regulation or complete shut-off of pipeline media within the intricate production processes of phthalic anhydride and maleic anhydride. Beyond these applications, it proficiently manages a variety of gases and liquids, including hydrogen, ammonia, air, smoke, and other gases within pipeline infrastructures. For media susceptible to crystallization, such as sulfur, an innovative jacketed structure option is available to combat blockages induced by cooling and condensation, ensuring seamless flow and optimal operational continuity.

Typically endowed with a state-of-the-art cylinder-type single-acting actuator, the AOC-4000 series four-link eccentric butterfly valve can be customized with a range of actuators to suit your specific requirements. Choose from cylinder-type double-acting actuators, cutting-edge electric actuators, or advanced hydraulic actuators, each offering their unique advantages. Revel in the valve's impressive capability of achieving a minimum shut-off time between a rapid 2 to 6 seconds, ensuring swift and efficient operations.</sup>




Working Principle

^{At the heart of the four-link butterfly valve is a meticulously designed mechanism comprising a drive device, valve plate, valve body, valve shaft, an intricate linkage system, and robust shaft end seals. The drive device orchestrates the opening and closing of the valve by maneuvering the valve shaft and the intricately engineered four-link mechanism. The valve shaft's rotation facilitates the valve plate's movement, and as the plate aligns perfectly with the pipeline center, the valve achieves full openness. Conversely, the reverse rotation seamlessly closes the valve, where the valve plate gently contacts and compresses the valve body's sealing surface, ensuring a complete and secure closure.}

Product Specifications

Body: The robust and durable body of our butterfly valves ensures optimal reliability and longevity, expertly crafted to withstand the most demanding industrial applications.

Type	Four Lever Offset Buterfly Valves
Body Size	NPS 6-64''(DN 150-DN 1600)
Disc Form	Four Lever Eccentric
Flow to	Flow into the shaft side
Characteristics	Liner/On-off
Trim material/Trim treatment	See valve material table
Body ratings	ASME B16.34 ANSI 150
Body Connections	·ANSI, EN Double Flanged ·ANSI B16.25 ·API 609 Single Flange-Lug Type
Face to Face Dimension	See valve overall size
Range ability	Over 100:1(See Cv coefficients table)
Bonnet Type	Standard -29 degree Radiation fin -55 degree-566 degree Cryogenic -196 degree-55 degree
Packing	PTFE flexible graphite
Leakage Class	According to API 598 Zero Leakage

 

Design Features

^{• Boasting a remarkable design, this valve accommodates a maximum diameter of the connecting valve body up to an impressive DN4000, ensuring versatility across various applications.
• Uniquely engineered, it incorporates a sophisticated four-stem structure design complemented by a flat seal design, achieving superior reliability and efficiency.
• The innovative external double bearing design ensures that no medium can infiltrate the bearing, effectively preventing blockage and enhancing longevity.
• Equipped with a high-performance drain valve, it provides robust protection against medium corrosion, maintaining the integrity of the system.
• Engineered for resilience, it supports high temperature applications up to a staggering 800 ºC, delivering unmatched durability and performance.
• Compliant with API607 standards, it features a cutting-edge Fire Protection Design, ensuring safety under extreme conditions.
• The integral stem design, coupled with anti-center shaft out features, guarantees operational stability and security.
• Incorporating an advanced anti-static design, it eliminates static build-up, enhancing safety and efficiency.
• Designed to prevent human error, its anti-misoperation design ensures precise and reliable operation.
• With multiple sealing structures available, it provides flexible solutions tailored to specific needs.
• Expertly crafted with a fabricated construction,
• In the initial opening and closing phases, the disc exhibits friction-free motion by moving parallel to the body seat, enhancing operational smoothness and reducing wear.
• Offers a variety of seat arrangements, adapting seamlessly to diverse operational requirements.}
 

Product Range

^{★ Design standard: AP1598, API607, ASME B16.34
★ Standard size: NPS 12-160" (DN 300-DN 4000)
★ Pressure class: PN 2.5-PN 20 / ASME CLASS 150
★ Applicable temperature: -20°C to 800°C
★ Leakage class: ANSI B16.104 VI, API 598 no leakage
★ Body material: ASTM A105, A351 CF8M /special alloy, etc.
★ Valve internals material: A479-316, S2205, 17-4PH
★ Operation mode: manual, pneumatic, electric, electro-hydraulic, etc.
★Product range can be expanded according to user needs}

Valve Special Treatments

<sup>• Sand Blasting Surface Treatment SA2.5
1. The valve body undergoes meticulous sandblasting both internally and externally.
2. Achieves a smooth, refined surface post-sandblasting, ensuring robust paint adhesion.
3. When the oxygen content in the medium exceeds 23.5%, external sandblasting is conducted, but internal sandblasting is deemed unnecessary.•</sup>

<sup>• Painting after Surface Treatment
1. Standard painted surfaces withstand temperatures up to 450°C, with options for specialized treatments for higher temperatures.
2. Features dual-layer paint application, each 35 micrometers thick, offering superior corrosion resistance.

• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The sealing surface of the valve plate can be enhanced through welding with premium alloys such as Hastelloy, Stellited gr.6,
b) Advanced options include tungsten carbide and other hard alloy spraying, achieving exceptional hardness levels up to HRC60-70.</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Our esteemed valves excel in the critical process of sulfur tail gas recovery, ensuring seamless and effective operation.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover: A testament to durability and performance, our product plays an integral role in the crossover segment of incineration boilers.stem, engineered to meet the most demanding industrial standards with exceptional reliability. Butterfly Valve (An engineering marvel, crafted to perfection for enduring performance and superior control.The right figure exemplifies the robust design is used product after 4 years), showcasing its long-lasting operational excellence.

Petro China 270,000 tons/year sulfur tail gas standard project: Our valves are pivotal in facilitating this massive scale operation, exemplifying unparalleled quality and reliability.

Catalytic flue gas turbine outlet butterfly valve, a superior alternative to traditional water seal tanks, providing advanced technology and efficiency.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Our valves demonstrate their leading-edge performance in these crucial applications.

Images from the scene: Witness the real-world application and efficiency of our products in action. of SINOCHEM GROUP Refining and Chemical: Showcasing the integration of our advanced valve systems in refining and chemical processes. Catalytic flue gas turbine outlet: Our valves are expertly designed to manage and optimize flue gas emissions. to chimney, ensuring smooth and environmentally sound operations.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. stands as a beacon of innovation and excellence in the realm of control valve production. Seamlessly merging advanced manufacturing, cutting-edge design, comprehensive sales, and unparalleled service, we are a powerhouse of industry progression. Nestled in the vibrant city of Qingdao, Shandong province, our expansive 42,000 square meters facility boasts state-of-the-art workshops and top-tier production equipment. Proudly recognized as a high-tech enterprise, we hold independent intellectual property rights and integrate superior global management and production methodologies. Our dedicated team of over 150 skilled professionals includes a significant 15% specialized in R&D, and a noteworthy 30% who hold graduate or higher degrees. With a steadfast commitment to quality and innovation, we deliver exceptional valve solutions catering to petrochemical, oil, and coal chemical sectors, achieving a sales milestone of nearly 100 billion in 2017.

SNT has proudly secured the prestigious TS special equipment manufacturing certificate, alongside the esteemed ISO 9001 certification. Our credibility is further bolstered by net qualification certificates from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents under our belt, we are adept at designing and fabricating a comprehensive range of valves per ANSI, API, DIN, BS, and JIS standards. Drawing inspiration from world-renowned valve technologies and fostering independent R&D, we manufacture 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, 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, and Cryogenic Valves, among others. Our versatile driving mechanisms range from manual, power-driven, pneumatic to hydraulic systems. With main components crafted from materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, our specifications span 1/2"~120", accommodating working pressures from ANSI 150#~2500#, and temperatures from -196ºC~1100ºC.

Leveraging our sophisticated production technology, meticulous quality management, and robust assurance systems, SNT Valves have earned widespread acclaim and adoption across diverse industries including petrochemical, oil, steel, iron, paper, and power generation. Our esteemed clientele features leading entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, among others. Our collaborative engagements with these industry titans underscore the reliability and superior performance of our valve solutions.

Placing customer profitability at the forefront of our mission, we are dedicated to crafting unparalleled quality products while building a distinguished brand reputation. Our comprehensive quality assurance and responsive after-sales systems ensure that SNT valves are synonymous with excellence, fostering prosperous partnerships with our valued customers. Together, we embark on a journey towards mutual prosperity and success.</sup>