Socket Welding/Bw/RF/Four Lever Offset Shutoff Butterfly Valves, Perfect for Fluid Control Solutions with Pneumatic Diaphragm Actuator

• 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 industrial sector, and the growing emphasis on energy efficiency and environmental protection, policies.The demand for cut-off butterfly valves has seen unprecedented growth. In traditional technologies,the tri-eccentricbutterfly valves operate on torque sealing principles, with the valve plate achieving closure through actuator torque, ensuring a robust seal. Nonetheless, under certain extreme conditions (such as high-temperature catalytic flue gases, various gases, sulfur tail gases reaching up to 800°C), thermal expansion stress can inhibit valve operation, risking severe outcomes like tri-eccentricbutterfly valve lock-ups, thereby disruptingindustrial production, causing substantial economic losses, and potentially leading to safety hazards. SNT VALVE is at the forefront of innovation,

specializing in pioneering research on high-temperature flue gas butterfly valves. In response to these challenges, SNT VALVE introduced the revolutionary four-stem eccentric butterfly valve, replacing the conventional tri- eccentric models, andintroducing the operationbutterfly valve as a groundbreaking solution in the industry. This innovation effectively resolved long-standing issues, resulting in two national patents: the four-stem eccentric butterfly valve (patent No. ZL201520326489.1) and catalytic device with the four-stem eccentric butterfly valve (patent No. ZL201921719624.3). This accomplishment was validated by the China Petroleum and Chemical Industry Federation through rigorous product identification in collaboration withChangzhou University, earning recognition as a leader in domestic innovation. Applications of the Four-link Eccentric Butterfly ValveThe AOC-4000 series four-link eccentric butterfly valve, meticulously engineered by SNT, serves as a premier solution for regulating and shutting off under unique conditions. This product is celebrated for its adaptability and superior performance in demanding environments.

<sup>Introducing the remarkable AOC-4000 series four-link eccentric butterfly valve, a paragon of efficiency and versatility in fluid control. Expertly designed for high-temperature, large-diameter, and high-flow scenarios, this valve ensures a low-pressure drop with minimal to zero leakage, making it indispensable for challenging environments. Its superior planar sealing performance eradicates the risk of valve jamming even under intense heat. Embrace the advantages of swift opening and closing, precision adjustment, and steadfast sealing, perfectly tailored for regulating or halting pipeline media, exemplified in the production processes of phthalic anhydride and maleic anhydride. This versatile valve adeptly controls various gases and liquids, including hydrogen, ammonia, air, smoke, and gas within pipeline systems. For media susceptible to crystallization, such as sulfur, an innovative jacketed structure can be implemented to avert pipeline blockages due to cooling and condensation, maintaining seamless flow.

Typically, the AOC-4000 series four-link eccentric butterfly valve is partnered with a robust cylinder-type single-acting actuator for optimal performance. However, based on specific needs, the flexibility to choose cylinder-type double-acting actuators, electric actuators, or hydraulic actuators is also available. This adaptability ensures that the minimum shut-off time can impressively range between 2 to 6 seconds, providing a tailored solution for diverse operational requirements.</sup>




Working Principle

^{The sophisticated four-link butterfly valve is a marvel of engineering, consisting of critical components such as a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The operational magic happens as the drive device propels the valve shaft and four-link mechanism, inducing the opening and closing of the valve. As the valve shaft rotates, the valve plate aligns parallel to the pipeline center, signaling a fully open state. Conversely, the reverse rotation prompts the valve plate to secure against the valve body's sealing surface, achieving a full closure. This elegant dance of movements ensures precise flow control, embodying the essence of high-performance valve technology.}

Product Specifications

Body: Meticulously designed to provide outstanding durability and resilience, the body of our Four Lever Offset Shutoff Butterfly Valves is crafted from top-grade materials. This ensures not only long-lasting performance but also unmatched efficiency in various demanding 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

^{• Our innovation leads with an impressive maximum diameter of the connecting valve body reaching up to DN4000, ensuring versatile and adaptable applications.
• A distinctively engineered four-stem structure, coupled with a sleek flat seal design, elevates the standards of efficiency and reliability.
• The advanced external double bearing design effectively blocks medium from infiltrating the bearing, safeguarding against obstructions and ensuring seamless performance.
• Ingeniously crafted drain valve serves as a shield against medium-induced corrosion, extending the lifespan and durability.
• Engineered for resilience, the high-temperature design withstands up to a remarkable 800 ºC, broadening operational scope in extreme conditions.
• Built-in API607 Fire Protection Design offers unmatched safety and peace of mind.
• Crafted with an integral stem design that incorporates an anti-center shaft out feature, ensuring unwavering stability.
• The anti-static design provides superior protection against static electricity, enhancing safety and performance.
• An intuitive anti-misoperation design is integrated to prevent accidental mishandling, securing flawless operation.
• Offers multiple sealing structures for customization, catering to diverse operational requirements.
• Excellently crafted fabricated construction ensures robustness and a long service life.
• In both the initial and final stages of operation, the disc's parallel movement to the body seat guarantees a frictionless motion, enhancing efficiency.
• Diverse seat arrangements available to meet specific requirements, offering tailored solutions for optimal performance.}
 

Product Range

^{★ Design Standard Excellence: AP1598, API607, ASME B16.34 - The benchmarks of quality engineering.
★ Standard Size Variety: NPS12-160 (DN300-DN4000) - Catering to a broad spectrum of requirements.
★ Pressure Rating Efficiency Class Leading: PN2.5-PN20 / ASME CLASS 150 - Crafted for optimal performance.
★ Wide Applicable Temperature Range: -20 °C to 800 °C - Designed for versatile conditions.
★ Superior Leakage Control Class: ANSI B16.104 VI, API598 - Ensures impermeability. No Leakage - Complete reliability assured.
★ Robust Body Material Choices: ASTM A105, A351 CF8M /Special Alloy, etc. - For enduring strength.
★ Advanced Valve Internals Material: A479-316, S2205, 17-4PH - Precision at its core.
★ Versatile Operation Modes: Manual, Pneumatic, Electric, Electro-Hydraulic, etc. - Adaptable to any application.
★Product Range Customizable to User Needs - Tailored just for you.}

Valve Special Treatments

<sup>• Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting, both internal and external, for the valve body
2. Achieves a pristine finish post-sandblasting, ensuring robust paint adherence
3. For medium with O2 content exceeding 23.5%, only external sandblasting is necessary; internal is not required•</sup>

<sup>• Painting after Surface Treatment
1. The standard painted surface can withstand temperatures up to 450°C. For higher temperatures, special treatment options are available.
2. Application of two protective paint coats, each 35 micrometers, for superior corrosion resistance

• Hard Alloy Surfacing on the Sealing Surface of the Valve Plate
a) The valve plate's sealing surface can be reinforced using Hastelloy, Stellited gr.6,
b) Utilizing tungsten carbide and other hard alloys for spraying, achieving a hardness of up to HRC60-70</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Our valves are meticulously designed to optimize the efficiency and reliability of sulfur tail gas recovery processes, ensuring superior performance and sustainability.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover: Experience unparalleled innovation with our precision-engineered shutdown solutions.Stem: Crafted with precision, the stem of our butterfly valve is integral to its robust and reliable operation, offering unmatched durability in demanding environments. Butterfly Valve: Featuring advanced design and technology, our butterfly valves epitomize excellence in fluid control, ensuring seamless integration and operation.The right: Seamlessly fitting into your fluid control systems, our valves offer the perfect balance of performance and reliability.figure: Our design reflects a commitment to high standards of engineering, making it a preferred choice for industry leaders. is: Engineered to meet the highest expectations, our product is synonymous with quality and innovation. used product after: Experience enduring performance and reliability with our products, which continue to excel years after deployment. 4 years): With proven longevity, our butterfly valves maintain exceptional performance and reliability even after extensive use. Petro China 270,000 tons/year sulfur tail gas standard project: Our butterfly valves are a key component in this high-capacity project, ensuring optimal operation and efficiency.

Catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Our innovative solution replaces traditional methods, offering superior efficiency and reliability.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Our valves are pivotal in enhancing performance and sustainability, setting new benchmarks in the industry.

Images from the scene: Visualize the impressive capability and integration of our butterfly valves in high-demand industrial environments.

of: Our butterfly valves are integral components in complex industrial applications, providing unmatched performance and reliability. SINOCHEM GROUP: A testament to our commitment to quality and innovation, our products are trusted by industry leaders like SINOCHEM GROUP. Refining and Chemical: Our solutions are pivotal in refining and chemical processes, offering precision and efficiency at every stage. Catalytic flue gas turbine outlet: Our butterfly valves are indispensable in managing flue gas emissions, ensuring environmental compliance and operational efficacy. to chimney: Our valves facilitate the seamless transition from turbine outlet to chimney, optimizing flow and minimizing emissions. to chimney: Our valves facilitate the seamless transition from turbine outlet to chimney, optimizing flow and minimizing emissions.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. stands as a premier innovator in the control valve industry, seamlessly integrating design, manufacturing, sales, and exceptional service. Situated in the vibrant city of Qingdao, within the expansive 42,000m2 facility, our cutting-edge workshops and advanced production equipment reflect our commitment to excellence. As a distinguished high-tech enterprise, we boast proprietary intellectual property and draw upon global management and production expertise. With a dedicated workforce exceeding 150 employees, 15% are R&D specialists and 30% boast graduate-level or higher qualifications, driving our innovation and high-quality output. Our valves, renowned for superior quality, are pivotal in petrochemical, oil, and coal chemical sectors, achieving a remarkable sales milestone nearing 100 billion in 2017.

SNT has proudly secured the TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside esteemed net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio boasts national patents across multiple technologies. We specialize in designing and crafting a comprehensive range of valves to ANSI, API, DIN, BS, and JIS standards. By integrating global valve innovations with our proprietary research, we offer a diverse assortment of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, and much more. Our driving mechanisms span manual, power-driven, pneumatic, and hydraulic operations. Primary materials include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, with specifications from 1/2" to 120", accommodating pressures up to ANSI 2500# and temperatures ranging from -196ºC to 1100ºC.

With cutting-edge production technology, superior management, and quality assurance systems, SNT Valves are indispensable across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes industry leaders like SINOPEC QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA Guangxi and Ningxia branches, and several prominent SINOPEC facilities, reinforcing our commitment to quality and reliability.

At SNT Machinery, the prosperity of our clients is our foremost mission. We are dedicated to crafting impeccable quality and cultivating a prestigious brand. Our comprehensive quality assurance and customer-focused after-sales systems ensure that SNT valves deliver unmatched performance, fostering collaborative success and shared growth with all our valued partners.</sup>