Basic Info.
Seal Form
Supercharging Pressured Sealed
Work Pressure
High Pressure (10.0mpa< Pn <80.0mpa)
Working Temperature
High Temperature (T>450°C)
Material of Seal Surface
Soft Sealed
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
Product Description
About SNT Butterfly Valves
Four-link Eccentric Butterfly Valve ApplicationThe 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 AOC-4000 series, a cutting-edge four-link eccentric butterfly valve designed for the most demanding industrial applications. This sophisticated piece of engineering excels in high-temperature environments, effortlessly handling large diameters and ensuring optimal flow with minimal pressure drop. Perfect for scenarios requiring low to zero leakage, the AOC-4000 showcases impeccable planar sealing that prevents any valve jamming even under extreme heat. Its design ensures rapid opening and closing with precision, offering unmatched adjustment accuracy and dependable sealing. This makes it an ideal choice for regulating or shutting off pipeline media, particularly in the production of phthalic anhydride and maleic anhydride. Additionally, it is versatile enough to manage other gases and liquids, including hydrogen, ammonia, and even smoke, throughout various pipeline systems. For crystallization-prone media like sulfur, an innovative jacketed structure is available, effectively preventing pipeline blockages caused by cooling and condensation.
Typically, the AOC-4000 series comes equipped with a state-of-the-art cylinder-type single-acting actuator, which is highly efficient for most applications. However, for tailored needs, options include cylinder-type double-acting actuators, as well as sophisticated electric and hydraulic actuators. Remarkably, the valve's minimum shut-off time can be as swift as 2 to 6 seconds, delivering rapid responses when time is of the essence.Working PrincipleThe operation of the four-link butterfly valve is a marvel of modern engineering. It comprises several key components: a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The valve's opening and closing mechanism is ingeniously powered by the drive device, which actuates the valve shaft along with the four-link mechanism. When the valve plate aligns parallel to the pipeline center, the valve achieves full openness, allowing unobstructed flow. Conversely, rotating the valve shaft in the opposite direction closes the valve, as the valve plate moves to contact and compress the valve body's sealing surface, ensuring a secure and complete closure.Valve Body Details
| 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 |
• Maximum diameter of connecting valve body up to DN4000
• Unique four-stem structure design, flat seal design
• External double bearing design prevents medium from entering the bearing and causing blocking
• Drain valve prevents medium corrosion
• High temperature design up to 800 ºC
• API607 Fire Protection Design
• Integral stem design, anti-center shaft out design
• Anti-static design
• Anti-misoperation design
• Multiple sealing structures for option
• Fabricated construction
• In the initial stage od opening and final stage od closing, the disc moves parallel to the body seat provinding a friction-free motion.
• Various seat arrangement
★ Design standard: AP1598API607ASMEB16.34
★ Standard size: NPS12-160" (DN300-DN4000)
★ Pressure class: PN2.5-PN20/ASME CLASS 150, offering high durability under pressure
★ Applicable temperature: -20°C to 800°C, ensuring performance in extreme temperatures
★ Leakage class: ANSI B16.104 VI, API 598 no leakage, guaranteeing a tight seal
★ Body material: ASTM A105, A351 CF8M /special alloy, etc., for robust construction
★ Valve internals material: A479-316, S2205, 17-4PH, ensuring longevity and reliability
★ Operation mode: manual, pneumatic, electric, electro-hydraulic, etc., offering flexible control options
★Product range can be expanded according to user needs, providing customizable solutions
• Sand Blasting Surface Treatment SA2.5
1. To ensure impeccable quality, we sandblast both the interior and exterior of the valve body, achieving an unparalleled smoothness.
2. Post-sandblasting, the surface is incredibly fine, ensuring exceptional paint adhesion that enhances durability.
3. If the oxygen content in the medium exceeds 23.5%, we conduct external sandblasting only, as internal sandblasting becomes unnecessary.•
• Painting after Surface Treatment
1. Our standard paint provides remarkable temperature resistance up to 450°C. For conditions above this, specialized treatments are available.
2. We apply two robust coats of paint, each 35 micrometers thick, offering superior protection against corrosion.
• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The valve plate's sealing surface can be skillfully welded with premium materials like Hastelloy or Stellited gr.6
b) Additionally, we offer tungsten carbide and other hard alloys for spraying, reaching an impressive hardness of HRC60-70. Typical Product Application
Sulfur Tail Gas Recovery: Unleash the power of our state-of-the-art valves to enhance efficiency and performance in sulfur tail gas recovery systems.
SINOCHEM GROUP Petrochemical Incineration Boiler Crossover: Our advanced valves are integral to the crossover systems, ensuring optimal performance and reliability.Stem: Experience the robust construction and design of our valve stem, crafted for durability and seamless operation. Butterfly Valve: Standout engineering tailored for precision control and long-lasting performance in tough industrial environments.T: This segment showcases the unparalleled craftsmanship and technical excellence of our product.The right: Features that set our valves apart, delivering unmatched reliability and efficiency. Figure: A glimpse into the innovative design and advanced technology incorporated in our butterfly valves. Is: A testament to the high standards of quality and precision in our product lineup. Used product after: Witness the enduring efficacy and dependability of our valves, even after extended use. 4 years: A timeline that highlights the resilience and consistent performance of our butterfly valves.
Petro China 270,000 tons/year sulfur tail gas standard project: Our valves play a pivotal role in pioneering projects like these, offering unmatched capability and reliability.
Catalytic flue gas turbine outlet butterfly valve instead of water seal tank: A modern solution designed to replace traditional methods, enhancing efficiency and output.
Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Explore the superior performance of our valves in various industrial comparisons.
Images from the scene: Visual documentation showcasing the real-world application and success of our valve solutions. Of: Integral elements that collectively contribute to the high performance of our valves. SINOCHEM GROUP: Proud partners in innovation and excellence, driving advancements in petrochemical applications. Refining and Chemical: Engaging applications in the refining and chemical sectors, underpinned by our valve technology. Catalytic flue gas turbine outlet: Strategically engineered for superior performance in complex industrial systems. To chimney: Efficiently channeling outputs to the chimney, our valves ensure smooth and reliable operations.
SNT Machinery (Qingdao) Co., Ltd. stands as a prominent producer of control valves, integrating the core aspects of manufacturing, design, sales, and service into a unified entity. Situated in the vibrant city of Qingdao, Shandong province, SNT Machinery spans an impressive area of 42,000 square meters, featuring state-of-the-art workshops and advanced production equipment. As a high-tech enterprise endowed with independent intellectual property rights, SNT leverages both imported advanced management and production expertise, underscoring its high starting point and rapid development trajectory. With a dynamic workforce of over 150 employees, 15% are dedicated R&D specialists, while 30% are graduates or hold higher educational qualifications. Through a commitment to high-quality production management and pioneering technology research and development, SNT Machinery excels in producing superior quality valves, extensively utilized across petrochemical, oil, and coal chemical industries. In 2017, the company's sales value soared to nearly 100 billion, highlighting its industry impact.
SNT Machinery has achieved significant certifications, including the TS special equipment manufacturing certificate and ISO 9001. Additionally, it holds the net qualification certificate from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Numerous national patents further bolster SNT's technological prowess. The company is proficient in designing and manufacturing a comprehensive range of valves according to ANSI, API, DIN, BS, and JIS standards. By amalgamating global valve expertise with independent R&D capabilities, SNT offers an extensive portfolio of valve solutions, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, and more. The driving forms encompass manual, power-driven, pneumatic, and hydraulic methods. Key materials include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications from 1/2" to 120", working pressures of ANSI 150# to 2500#, and operating temperatures ranging from -196ºC to 1100ºC.
Employing cutting-edge production technology management and a robust quality assurance system, SNT valves have garnered widespread application in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients include SINOPEC QILU Branch, SINOPEC Qingdao Branch, and CNOOC Huizhou Refinery, among others, cementing SNT's reputation for reliability and excellence.
At SNT Machinery, we prioritize user profitability and are fully committed to establishing an exceptional reputation for quality and brand integrity. Our comprehensive quality assurance and after-sales systems ensure that SNT valves consistently meet and exceed customer expectations. By fostering collaborative partnerships, we strive to drive mutual prosperity and innovation with all our valued clients.
Address:
Shiao International 1602, Shinan District, Qingdao, Shandong, China
Business Type:
Manufacturer/Factory
Business Range:
Industrial Equipment & Components
Management System Certification:
ISO 9001, ISO 20000, IATF16949, HSE
Company Introduction:
SNT Machinery(Qingdao)Co., Ltd. Stands as a leading authority in control valve manufacturing. Based in the strategic hub of Qingdao, Shandong province, our sprawling 42, 000m² Facility is outfitted with cutting-edge workshops and advanced production equipment. As a high-tech enterprise, we take pride in owning independent intellectual property rights and implementing cutting-edge international management and production techniques. Our team of over 150 dedicated professionals includes 15% R&D specialists and 30% with graduate degrees or higher. This commitment to excellence and innovation enables us to produce a diverse array of top-tier valves, widely utilized across the petrochemical, oil, and coal chemical industries. In an impressive milestone, our sales neared 100 billion in 2017. SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We are honored to possess net qualification certificates from industry titans including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess has garnered us multiple national patents. We design and manufacture an extensive range of valves adhering to stringent ANSI, API, DIN, BS, and JIS standards. By merging the finest attributes of world-renowned valves with our innovative R&D, we offer a comprehensive portfolio featuring GLOBE Valves, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and beyond.
Our product lineup showcases V Ball Valves, High Wear-resistant Ball Valves, High-Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, available in manual, electric, pneumatic, and hydraulic driving forms. We use premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, accommodating working pressures from ANSI 150# to 2500# and operating temperatures from -196º C to 1100º C. Utilizing our advanced production technology, precise management, and robust quality assurance systems, SNT valves earn trust across diverse industries including petrochemical, oil, steel, iron, paper manufacturing, and power stations. Our esteemed clientele features SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, among others. At SNT, we are devoted to maximizing customer profitability by consistently delivering superior quality and establishing a reputable brand. Our unwavering commitment to comprehensive quality assurance and exemplary after-sales services ensures that SNT valves cultivate enduring partnerships with our clients, driving mutual success and long-term prosperity.
