Heavy-Duty Four Lever Butterfly Valves for Fluid Control/API598/API607/ASME B16.34/ASTM/A105/A351 CF8 M for Body Valves 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, with the rapid advancement of the industry, there's been a surge in demand for high-quality industrial components. Moreover, the emphasis on energy conservation and stringent environmental protection policies are reshaping industrial standards. These policies,coupled with the increasing application of shut-off butterfly valves, underscore their growing significance. Historically, the prior technology presented limitations.In this realm, the tri-eccentric butterfly valve relied heavily on torque sealing, where the actuator's torque closes the valve plate snugly to ensure a tight seal. However, in specific scenarios (such as extreme conditions involving high-temperature catalytic flue gas, aggressive gases, and sulfur tail gases, with temperatures soaring to 800°C), the resulting thermal expansion stress can render the valve inoperable, leading to grave outcomes such as tri-eccentric butterfly valve malfunctions, disruptingindustrial operations and processes,resulting in substantial economic impacts and potential safety hazards.


SNT VALVE is dedicated to pioneering the research and development of butterfly valves tailored for high-temperature flue gas applications. In response to these challenges, SNT VALVE introduced the innovative four-stem eccentric butterfly valve, a groundbreaking alternative to the traditional tri-eccentric butterfly design, alongside the operation butterfly valve, marking a pioneering solution in the industry. This revolutionary approach has successfully addressed longstanding issues, earning two national patents: a four-stem eccentric butterfly valve (patent No.: ZL201520326489.1) and a catalytic device integrating the four-stem eccentric butterfly valve (patent No.: ZL201921719624.3). This innovation has been recognized by the China Petroleum and Chemical Industry Federation, which conducted rigorous product evaluations in collaboration with Changzhou University, and the product has been honoredas a benchmark for domestic excellence.

<sup>Applications of the Four-link Eccentric Butterfly Valve

The AOC-4000 series, ingeniously crafted by SNT, serves as an indispensable solution for special condition regulation and shut-off applications, embodying the pinnacle of engineering excellence.
Introducing the AOC-4000 series, a groundbreaking four-link eccentric butterfly valve engineered for excellence in demanding conditions. Designed for scenarios requiring high-temperature resilience, large-diameter adaptability, substantial flow capacity, minimal pressure drop, and impeccable leakage prevention, this valve is your go-to solution. Its superior planar sealing ensures no valve jamming, even at peak temperatures, providing swift and precise control. Ideal for regulating or halting pipeline media in chemical production settings like phthalic and maleic anhydride, it also excels in managing other gases and liquids, such as hydrogen, ammonia, air, and smoke. When dealing with crystallization-prone media like sulfur, opt for the innovative jacketed structure to avert blockages from cooling and condensation, ensuring seamless flow control.

The AOC-4000 series four-link eccentric butterfly valve is designed to offer flexibility and performance with various actuator options. Typically coupled with a cylinder-type single-acting actuator, this versatile valve can be tailored to fit your requirements with cylinder-type double-acting actuators, electric actuators, or hydraulic actuators. Experience responsive control with a remarkable minimum shut-off time range of just 2-6 seconds, ensuring efficiency and precision in every operation.</sup>




Working Principle

^{The ingenious design of the four-link butterfly valve comprises crucial components such as the drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The seamless operation of opening and closing is powered by the drive device, which activates the valve shaft and four-link mechanism. Rotation of the valve shaft unfolds the valve plate, achieving a fully open state when parallel to the pipeline center. Conversely, a reverse rotation secures the valve's closure as the valve plate compresses against the body's sealing surface, ensuring a perfectly sealed system.}

Product Specifications

Body: Robust Construction and Premium Materials for Enhanced Durability and Optimum Performance

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

^{• With an impressive maximum diameter of connecting valve body up to DN4000, this valve caters to extensive industrial applications with ease.
• Featuring a unique and sophisticated four-stem structure design, coupled with a flat seal design, ensuring optimal performance and reliability.
• Ingenious external double bearing design effectively prevents medium from intruding into the bearing, thereby eliminating any risk of blockage.
• The innovative drain valve ensures protection against medium corrosion, thereby enhancing the longevity and durability of the valve.
• Engineered for extreme conditions with a high temperature tolerance reaching up to 800 ºC, making it perfect for high-stress environments.
• Compliant with API607 Fire Protection Design, offering superior safety and reliability in hazardous conditions.
• Incorporates an integral stem design with an anti-center shaft out feature, ensuring robust security and stability during operation.
• Equipped with an anti-static design, this valve effectively dissipates static electricity, ensuring safe operation.
• Thoughtfully designed to prevent mishandling with an anti-misoperation feature, further safeguarding operational integrity.
• Offers various multiple sealing structures for option, catering to diverse industrial needs and ensuring optimal sealing efficiency.
• Built with a durable and robust fabricated construction, guaranteeing long-lasting performance and reliability.
• In the initial stage of opening and final stage of closing, the disc moves parallel to the body seat, providing a unique friction-free motion, enhancing operational efficiency and longevity.
• Offers versatility with various seat arrangements, adapting seamlessly to specific requirements and enhancing adaptability.}
 

Product Range

^{★ Design standard: AP1598, API607, ASME B16.34
★ Standard size: NPS12-160 (DN300-DN4000)
★ Pressure class: PN2.5-PN20 / 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, orspecial 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>• Advanced Sand Blasting Surface Treatment - SA2.5
1. Thorough sandblasting inside and outside of the valve body for optimal preparation
2. Achieve a refined surface post-sandblasting, ensuring strong paint adhesion
3. For media with oxygen content exceeding 23.5%, only external sandblasting is necessary, negating the need for internal treatment•</sup>

<sup>• Premium Painting Process after Comprehensive Surface Treatment
1. Our standard painted surfaces endure temperatures up to an impressive 450°C; higher temperature treatments available separately
2. Two coats of durable paint, each 35 micrometers thick, ensuring robust corrosion protection

• Superior Hard Alloy Surfacing on the Sealing Surface of the Valve Plate
a) The valve plate's sealing surface can be expertly welded with materials such as Hastelloy, Stellited gr.6,
b) Sprayed with tungsten carbide and other resilient hard alloys, achieving a remarkable hardness of HRC60-70</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Harness the power of our butterfly valves to achieve superior performance in sulfur tail gas recovery processes, ensuring enhanced operational efficiency.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-: Our esteemed collaboration with SINOCHEM GROUP highlights the efficacy of our products in critical petrochemical applications.stem: Engineered to perfection, our valve stems are crafted for durability and precision in industrial fluid control mechanisms. Butterfly Valve: Experience unmatched control with our expertly crafted butterfly valves, designed for seamless integration into your industrial systems.The right: Positioned at the forefront of innovation, our products stand as testament to cutting-edge engineering. figure: The figure epitomizes the sophistication and reliability of our butterfly valves in various industrial settings. is: This represents a paradigm of excellence in fluid control. used product after: Experience a product that has stood the test of time, delivering consistent quality and performance. 4 years): A testament to durability and reliability, operating seamlessly even after 4 years of deployment.

Petro China 270,000 tons/year sulfur tail gas standard project: Our products have been integral to the success of the large-scale Petro China project, ensuring superior performance and efficiency.

catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Our butterfly valves effectively replace traditional systems, offering enhanced control and reliability.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Discover the comparative advantage of our valves in optimizing heat recovery processes.

Images from the scene: Capturing the real-world application of our products, these images reflect our commitment to excellence and innovation. of: Highlighting the significance of our solutions in industrial applications. SINOCHEM GROUP: Partnering with industry leaders like SINOCHEM GROUP showcases our dedication to quality and performance. Refining and Chemical: Our products are tailored to meet the rigorous demands of the refining and chemical industries, ensuring optimal performance. catalytic flue gas turbine outlet: Our valves are engineered to deliver superior performance in catalytic flue gas systems. to chimney: Precisely designed to facilitate efficient flue gas management from turbine outlet to chimney.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. is a prestigious manufacturer of control valves, seamlessly integrating manufacturing, design, sales, and service into a cohesive operation. SNT is strategically positioned in Qingdao, Shandong Province, sprawling over an impressive 42,000 square meters, adorned with state-of-the-art workshops and cutting-edge production equipment. As a distinguished high-tech enterprise, SNT boasts independent intellectual property rights alongside a wealth of imported advanced management and production experience. Our talented team comprises over 150 skilled professionals, with 15% dedicated to R&D and 30% holding graduate or higher degrees. Our commitment to excellence is embodied by a top-tier production management team and a passion for innovative research and development. This dedication allows us to deliver high-quality valves catering to the petrochemical, oil, and coal chemical industries. With an impressive sales value approaching 100 billion in 2017, SNT has solidified its status as a leader in the industry.

SNT has proudly earned the TS special equipment manufacturing certificate and ISO 9001 certification, along with prestigious net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Boasting numerous national patents, our expertise enables us to design and produce an extensive range of valves in accordance with ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of globally renowned valves and spearheading independent R&D, SNT manufactures a diverse array of valves, including Globe Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, 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. Our driving forms encompass manual, power-driven, pneumatic, and hydraulic options. We employ high-quality materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc., with specifications ranging from 1/2" to 120", working pressures of ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.

With a foundation in advanced production technology management and a robust quality assurance system, SNT Valves are trusted across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes industry giants like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, as well as the SINOPEC Changling branch, Jinan branch, and many more.

At SNT, customer profitability is at the forefront of our mission. We are committed to establishing a reputation for exceptional quality and an esteemed brand. Our comprehensive quality assurance and after-sales systems are designed to ensure that SNT Valves work hand-in-hand with our customers to create mutual success and unparalleled prosperity.</sup>