Four Lever Offset Shutoff Butterfly Valves, Nps 12-160" with API607 Compliance

• 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 industrial advancements have surged forward, the emphasis on energy conservation and environmental protection has become paramount. Policy changes in this domainhave led to the increased adoption of cut-off butterfly valves. Historically, in prior technological paradigms, thetri-eccentric butterfly valve functioned through torque sealing, employing actuator torque to close the valve plate more securely, ensuring an effective seal. However, certain exigent conditions arise (such as high-temperature catalytic flue gases, various gases, sulfur tail gases, and other media reaching temperatures up to 800°C). In these scenarios, thermal expansion stress can hinder valve operation, culminating in grave outcomes like the tri-eccentric butterfly valve becoming stuck, which adverselyaffectsthe continuity of industrial operations, potentially leading to significant financial losses and even safety hazards. causing huge economic losses, and even cause safety accidents.

SNT VALVE excels in the development and innovation of high-temperature flue gas device butterfly valves. To address the challenges mentioned above, SNT VALVE pioneered the introduction of a four- levereccentric butterfly valve, replacing the conventional tri- eccentric butterfly valves. This innovation,has been a game-changerin the industry. Itoperates with unparalleled efficiency, successfully overcoming longstanding issues, earning two national patents: a four-lever eccentric butterfly valve (patent No.: ZL201520326489.1) and a catalytic device featuring a four-lever eccentric butterfly valve (patent No.: ZL201921719624.3). This has been recognized by the China Petroleum and Chemical Industry Federation which conducted a thorough product assessment in partnership with Changzhou Universityand the result has been acknowledgedas leading in the domestic sphere.
 

<sup>Four-link Eccentric Butterfly Valve Application: The AOC-4000 series, crafted by SNT, is prominently utilized as a specialized regulating and shut-off valve under exceptional conditions.

The AOC-4000 series four-link eccentric butterfly valve, designed by SNT, is widely used as a special condition regulating and shut-off valve.
Discover the unparalleled capabilities of the AOC-4000 series four-link eccentric butterfly valve, meticulously engineered for exceptional performance in a variety of demanding scenarios. Whether dealing with high temperatures, large diameters, or high flow rates, this valve excels in reducing pressure drops and minimizing leakage. It boasts remarkable planar sealing performance, effectively preventing valve jamming even in extreme conditions. With its rapid open-close functionality and outstanding adjustment precision, this valve is a perfect choice for regulating or halting pipeline media, particularly in the production of phthalic anhydride and maleic anhydride. Furthermore, it proves its versatility by adeptly managing other gases and liquids, including hydrogen, ammonia, air, smoke, and gas in various pipeline systems. For media susceptible to crystallization, such as sulfur, the valve can be outfitted with a jacketed structure, ensuring smooth flow by avoiding blockages caused by cooling and condensation.

The AOC-4000 series four-link eccentric butterfly valve typically comes equipped with a high-performance cylinder-type single-acting actuator, offering remarkable control and efficiency. However, for those seeking tailored solutions, options are available to incorporate cylinder-type double-acting actuators, electric actuators, or hydraulic actuators, ensuring optimal performance to meet your specific needs. Notably, the valve's rapid response is evidenced by its minimum shut-off time of just (2-6) seconds, guaranteeing swift and secure operation.</sup>




Working Principle

^{The innovative four-link butterfly valve is composed of integral components including a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The process of opening and closing the valve is initiated by the drive device, which activates the valve shaft along with the four-link mechanism. As the valve shaft rotates, the valve plate opens, achieving a fully open state when the plate is aligned parallel to the pipeline center. Conversely, the reverse rotation of the valve shaft facilitates the closing of the valve plate. Complete closure is achieved when the valve plate makes contact with and compresses against the sealing surface of the valve body, thus ensuring a secure and leak-proof seal.}

Product Specifications

Body

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

^{• Crafted to perfection, this valve boasts a maximum connection diameter reaching up to DN4000, making it an industrial marvel.
• Innovative and unique four-stem structure design, coupled with a flat seal for impeccable sealing performance.
• Engineered with an external double bearing design, effectively preventing medium intrusion and blockage, ensuring seamless operation.
• Equipped with a state-of-the-art drain valve that expertly prevents medium corrosion, enhancing longevity.
• Designed to withstand extreme temperatures, this model can operate efficiently up to a soaring 800ºC.
• Features the robust API607 Fire Protection Design, ensuring superior safety and reliability.
• Comprehensive integral stem design, with an anti-center shaft out feature to maintain structural integrity.
• Incorporates an anti-static design, safeguarding against potential static discharge issues.
• Ingenious anti-misoperation design to avert accidental or erroneous usage.
• Offers an array of multiple sealing structures for customizable options, catering to diverse application needs.
• Boasts a fabricated construction for exceptional strength and durability.
• In the initial and concluding stages of operation, the disc ensures friction-free movement by gliding parallel to the body seat.
• Provides various seat arrangements to accommodate specific 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; 17-4 PH
★ Operation mode: manual, pneumatic, electric, electro-hydraulic, etc.
★Product range can be expanded according to user needs}

Valve Special Treatments

<sup>• Premium Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting, both inside and outside of the valve body, ensures optimum cleanliness and preparation.
2. Delivers an impeccably fine surface post-sandblasting, ensuring robust paint adhesion that enhances longevity.
3. When the oxygen content in the medium exceeds 23.5%, external sandblasting becomes essential, whereas internal sandblasting can be omitted.•</sup>

<sup>• Enhanced Painting Process After Comprehensive Surface Treatment
1. The standard painted surface withstands temperatures up to an impressive 450°C; for even higher temperatures, specialized treatments are available.
2. Dual-layered paint coats, each 35 micrometers thick, are applied for superior corrosion resistance.

• Advanced Hard Alloy Surfacingon Sealing Surface of Valve Plate for Maximum Durability
a) Employing welding techniques with Hastelloy or Stellited gr.6, the valve plate's sealing surface achieves unmatched resilience.
b) Through tungsten carbide and other hard alloy spraying, surfaces reach a hardness of HRC60-70, ensuring exceptional wear resistance.</sup>
 

Typical Product Application

Efficient Sulfur Tail Gas Recovery

SINOCHEM GROUP: Petrochemical Incineration Boiler Crossover Four-stem: The Heart of Our System Our Top-Quality Butterfly Valve (Trusted by Industry Leaders: SNThe right choice for optimal performance figure that exemplifies excellence is designed for longevity and reliability a preferred product, even after an impressive 4 years of service

Petro China: 270,000 tons/year sulfur tail gas project adherence to standards

Catalytic flue gas turbine outlet butterfly valve, replacing the traditional water seal tank

A comprehensive comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site

Captivating Images from the Scene of renowned SINOCHEM GROUP's Refining and Chemical Innovations Catalytic Flue Gas Turbine Outlet to a sustainable chimney solution

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. stands as a premier producer of control valves, seamlessly integrating manufacturing, design, sales, and services into one cohesive entity. With a forward-thinking and innovative approach, SNT is strategically situated in Qingdao, Shandong province, sprawling across a vast 42,000 square meters. The facility is equipped with state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, SNT boasts independent intellectual property rights while integrating advanced international management and production expertise. The team comprises over 150 dedicated professionals, including 15% R&D specialists and 30% graduates or higher degree holders. Anchored by a top-tier production management team and pioneering technology research and development, SNT consistently delivers high-quality valves extensively utilized in the petrochemical, oil, and coal chemical sectors. In 2017, the sales value impressively approached 100 billion.

SNT has proudly secured the TS special equipment manufacturing certificate along with ISO 9001 certification. We are also accredited with the net qualification certificate from prominent entities such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is evidenced by numerous national patents across various technologies. We expertly design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By blending the best features of renowned global valves with our own independent R&D, SNT has mastered the art of crafting an array of valves, including GLOBE, 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. We offer diverse driving forms such as manual, power-driven, pneumatic, and hydraulic. The main component materials encompass A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc. Specification ranges from 1/2" to 120", with working pressure spanning ANSI 150# to 2500#, and working temperatures ranging from -196ºC to 1100ºC.

Thanks to our sophisticated production technology management and robust quality assurance system, SNT Valves have earned widespread adoption across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes the SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others.

At SNT, we prioritize the profits of our users, dedicating ourselves to the creation of superior quality products and a strong brand presence. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT valves collaborate harmoniously with all our customers, fostering shared prosperity and success.</sup>