Four Lever Offset Shutoff Butterfly Valves for Nps 12-160" Sizes

• 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, With the improvement of industry and the requirements of energy conservation and environmental protection policy, the cut-off butterfly valve has been more and more widely used. In the prior technology, the tri-eccentric butterfly valve belongs to torque sealing, and the valve plate is closed more tightly by the torque of the actuator to achieve the sealing effect. However, in some special occasions (such as high temperature catalytic flue gas, gas, sulfur tail gas and other media, the temperature reaches 800°C), due to the existence of thermal expansion stress, the valve will not be able to open, easy to cause serious consequences such as tri-eccentric butterfly valve stuck, affecting industrial production, causing huge economic losses, and even cause safety accidents.


SNT VALVE is specialized in the research of high temperature flue gas device butterfly valve. For the above problems, SNT VALVE proposed to use four-stem eccentric butterfly valve instead of tri-eccentric butterfly valve and aeration butterfly valve as a solution in the industry for the first time, successfully solved the problem for many years, applied for two national patents: a four-stem eccentric butterfly valve (patent No.: ZL201520326489.1 and catalytic device with four-stem eccentric butterfly valve (patent No.: ZL201921719624.3), and commissioned China Petroleum and Chemical Industry Federation wot conduct product identification with Changzhou University, which was awarded as the domestic leader.

<sup>Four-link Eccentric Butterfly Valve Application

The AOC-4000 series four-link eccentric butterfly valve, designed by SNT, is widely used as a special condition regulating and shut-off valve.
Introducing the exceptional AOC-4000 series four-link eccentric butterfly valve, meticulously crafted for high-temperature environments, large diameters, and robust flow applications where maintaining low pressure drop and minimal leakage is paramount. Boasting outstanding planar sealing capabilities, this valve effectively eliminates the risk of jamming even under intense heat conditions. Its design ensures rapid opening and closing with unparalleled adjustment precision, coupled with dependable sealing integrity. This makes it the ideal choice for managing and regulating pipeline media, particularly in the sophisticated production realms of phthalic anhydride and maleic anhydride. Beyond these applications, the valve adeptly handles a variety of gases and liquids, including hydrogen, ammonia, air, smoke, and gas within complex pipeline systems. For those challenging media prone to crystallization, such as sulfur, an advanced jacketed structure option is available to avert pipeline obstruction issues caused by cooling and condensation during flow.

The versatile AOC-4000 series four-link eccentric butterfly valve is predominantly paired with a cylinder-type single-acting actuator for optimal performance. However, it also offers flexibility with the option to integrate cylinder-type double-acting actuators, along with advanced electric or hydraulic actuators, depending on specific operational needs. Remarkably, the valve achieves a minimal shut-off time ranging between an impressive 2 to 6 seconds, ensuring swift and efficient operation.</sup>




Working Principle

^{The sophisticated mechanism of the four-link butterfly valve incorporates an intricately designed drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. Initiated by the drive device, the valve shaft and the four-link mechanism collaborate to facilitate the opening and closing functions. The valve plate is rotated into position; when aligned parallel to the pipeline's center, it signifies a fully open valve. Conversely, as the valve shaft rotates in the opposite direction, the valve plate seals tightly against the valve body's surface, ensuring the valve is securely closed, providing complete control over the flow within the system.}

Product Specifications

Body: Revel in the superior engineering of Four Lever Offset Shutoff Butterfly Valves, meticulously crafted by SNT Machinery (Qingdao) Co., Ltd. With an impressive range accommodating NPS 12-160" sizes, these valves demonstrate exceptional durability and precision. Our state-of-the-art body design guarantees robust performance and seamless operations in any demanding industrial environment. Experience the perfect blend of innovative design and unparalleled functionality with each valve, ensuring reliability and efficiency in every application.

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 an impressive maximum diameter for connecting valve bodies, our innovative design accommodates sizes up to DN4000, ensuring versatility and adaptability.
• Distinctive four-stem formation with a flat seal structure, delivering superior performance and enhanced sealing capabilities.
• The advanced external double bearing design meticulously prevents medium infiltration, effectively avoiding potential blockages.
• Our meticulously designed drain valve effortlessly protects against medium corrosion, extending the valve's operational lifespan.
• Engineered to withstand extreme conditions, our high temperature design endures up to a phenomenal 800 ºC,
• Incorporating API607 Fire Protection Design, ensuring safety and reliability under fire situations.
• An integral stem concept paired with an anti-center shaft fallout feature guarantees dependable operation.
• Innovative anti-static design minimizes risks, safeguarding both equipment and operators.
• Anti-misoperation design effectively prevents unauthorized or accidental manipulations.
• A variety of sealing structures are available for selection, catering to diverse application requirements.
• Expertly crafted fabricated construction ensures durability and strength.
• In the initial stage of opening and final closing, the disc operates parallel to the body seat, offering a friction-free motion for smooth performance.
• Diverse seat arrangements are available, tailored to optimize functionality and efficiency.}
 

Product Range

^{★ Design Standard: Crafted in compliance with AP1598, API607, and ASMEB16.34, ensuring top-tier quality and performance.
★ Standard Size: Available for NPS 12-160" (DN300-DN4000), catering to a broad spectrum of needs.
★ Pressure Class: Supports PN2.5-PN20/ASME CLASS 150, built to withstand significant pressure.
★ Applicable Temperature: Functioning seamlessly between -20 °C and 800 °C, adaptable to extreme conditions.
★ Leakage Class: Adheres to ANSIB16.104VI, API598 standards, ensuring no leakage. No Leakage
★ Body Material: Crafted from ASTMA105, A351CF8M, and includes special alloys for enhanced durability.Special Alloy, etc.
★ Valve Internals Material: A479-316, S2205, 17-4PH, designed for reliable performance.
★ Operation Mode: Offers versatility with manual,, pneumatic, electric, electro-hydraulic, etc., allowing tailored control solutions.
★Product range can be expanded according to user needs, providing flexibility and customization.}

Valve Special Treatments

<sup>• Advanced Sand Blasting Surface Treatment SA2.5
1. Complete sandblasting of the valve body inside and out for impeccable finish
2. Achieves a flawlessly smooth surface, ensuring superior paint adhesion
3. For media with an O2 contentgreater than 23.5%, only external sandblasting is required, internal is optional•</sup>

<sup>• Premium Painting Techniques after Surface Treatment
1. Standard painted finish withstands temperatures up to 450°C; customization available for even higher temperatures
2. Dual-layer paint application with 35-micrometer thickness for optimal corrosion resistance

• Durable Hard Alloy Surfacingon Sealing Surface of Valve Plate
a) Valve plate's sealing surface can be enhanced with welding of Hastelloy or Stellited gr.6,
b) Option for tungsten carbide and other hard alloy spraying, achieving hardness levels of HRC60-70</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Experience unparalleled efficiency and precision in sulfur tail gas recovery operations with our high-performance solutions designed to enhance productivity and environmental compliance.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-stem: Witness excellence in engineering with our SINOCHEM GROUP Petrochemical Incineration Boiler Crossover solutions, engineered to meet the highest standards of durability and efficiency.stem: Our stem technology is crafted to ensure seamless operation and long-lasting performance, tailored to meet your specific requirements with uncompromised quality. Butterfly Valve (: Delve into the advanced features of our Butterfly Valves, offering superior control and unmatched reliability for diverse applications.T: The letter 'T' symbolizes our commitment to technological advancements, transforming industry standards through innovative engineering.he right: Explore the right solution crafted with precision engineering, dedicated to delivering exceptional results for your industrial applications. figure: Our figure represents a perfect blend of form and function, ensuring that every component plays a vital role in the overall performance. is: Trust is built into every aspect of our design, promising consistent and reliable performance that exceeds expectations. used product after: Gain confidence in our products with proven longevity and effectiveness, remaining dependable even after years of rigorous use. 4 years): After four years of exceptional service, our products continue to deliver outstanding performance, proving their durability and reliability time and again.

Petro China 270,000 tons/year sulfur tail gas standard project: Proudly part of Petro China's landmark project, contributing to environmentally sustainable solutions and industrial advancements.

catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Revolutionize your operations with our cutting-edge catalytic flue gas turbine outlet butterfly valve, designed to replace traditional water seal tanks with superior efficiency.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: A comprehensive comparison highlights our superior solutions, designed to optimize performance and efficiency at SINOPEC's heat recovery boiler sites.

Images from the scene: Visualize the excellence of our installations with captivating images that showcase the real-world application and impact of our products. of: Every component and system is meticulously crafted to be part of a larger, highly efficient ecosystem that enhances operational success. SINOCHEM GROUP: Partner with SINOCHEM GROUP for innovative solutions that drive industrial growth and environmental stewardship. Refining and Chemical: Specializing in refining and chemical processes, our solutions are engineered to meet the rigorous demands of the industry. catalytic flue gas turbine outlet: Our catalytic flue gas turbine outlet solutions lead the industry in performance and reliability, ensuring optimal operation under challenging conditions. to chimney: Efficiently channel operations from turbine outlet to chimney, with our tailor-made solutions that guarantee exceptional performance and environmental compliance.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. stands as a beacon of innovation and expertise in the realm of control valves. Seamlessly merging manufacturing, design, sales, and service, we are strategically positioned in the vibrant city of Qingdao, Shandong province, covering a sprawling 42,000 square meters. Our state-of-the-art workshops and cutting-edge production technologies underscore our status as a high-tech enterprise with exclusive intellectual property rights. In addition, we harness the power of advanced management and production techniques from across the globe. With a dynamic workforce exceeding 150 professionals, our R&D specialists make up 15%, while a significant 30% boast graduate or higher-level qualifications. Our unwavering commitment to excellence is reflected in our production management and pioneering R&D efforts, enabling us to deliver premium valves for the petrochemical, oil, and coal chemical sectors. Our impressive sales milestone reached nearly 100 billion in 2017, a testament to our quality and innovation.

SNT has proudly secured the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation. Additionally, we have earned the net qualification certificate from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our relentless pursuit of innovation has led to numerous National Patents in cutting-edge technologies. We are adept at designing and manufacturing a comprehensive range of valves in accordance with ANSI, API, DIN, BS, JIS standards. By integrating the best features of renowned global valves with our independent research, we offer an extensive selection of valves such as Globe Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and many more. Our portfolio includes manual, power-driven, pneumatic, and hydraulic operations, with materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, covering specifications from 1/2" to 120", and accommodating working pressures of ANSI 150# to 2500#, with temperatures ranging from -196ºC to 1100ºC.

With a foundation built on advanced production technology and a robust quality assurance system, SNT valves have found their place in critical industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC QILU Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, and many more strategic industry players, affirming our presence and reliability in the market.

At SNT, we are committed to prioritizing our users' success and prosperity. Our dedication to excellence and brand integrity is unwavering. With a flawless quality assurance and responsive after-sales system, we ensure that SNT valves not only meet but exceed expectations, forging enduring partnerships that drive mutual growth and success.</sup>