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 revolutionary four-link eccentric butterfly valve, expertly crafted for environments demanding high-temperature resilience, large diameter capacities, and exceptional flow management. This valve excels in low-pressure drop and both low and zero-leakage scenarios, making it an indispensable asset for any advanced piping system. Its superior planar sealing prowess ensures flawless operation without risks of valve jamming, even under severe thermal conditions. With lightning-fast opening and closing actions, coupled with unparalleled adjustment precision and steadfast sealing reliability, this valve is the go-to solution for regulating or shutting off pipeline media, particularly in the sophisticated production chains of phthalic and maleic anhydride. Furthermore, its versatility shines as it adeptly manages other gases and liquids like hydrogen, ammonia, air, smoke, and gas across various pipeline systems. For media with crystallization tendencies, such as sulfur, the innovative jacketed structure is available to prevent any potential blockages stemming from cooling and condensation during flow.
The AOC-4000 series is designed with flexibility in mind, typically integrating a cutting-edge cylinder-type single-acting actuator. However, it offers adaptability with options for cylinder-type double-acting actuators, as well as electric or hydraulic actuators, tailored to your specific operational needs. Remarkably, the valve boasts a minimum shut-off time of just 2-6 seconds, ensuring swift and efficient control.Working PrincipleThe engineering brilliance of the four-link butterfly valve is evident in its meticulous construction, featuring a robust drive device, valve plate, valve body, valve shaft, linkage system, and secure shaft end seals. Activation of the valve is achieved through the drive device that propels the valve shaft and the ingenious four-link mechanism. By rotating the valve shaft, the valve plate transitions to an open position, aligning perfectly parallel to the pipeline center, thereby achieving full openness. Conversely, rotating the shaft in the opposite direction closes the valve plate, which then contacts and compresses against the valve body's sealing surface, culminating in a complete closure. This seamless operation underscores the valve's efficiency and reliability in critical applications.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 |
• Boasting an impressive maximum diameter of connecting valve body that extends to DN4000, our Four Lever Offset Shutoff Butterfly Valves are engineered to perfection.
• The exceptional four-stem structure design is complemented by a sophisticated flat seal design, ensuring reliability and efficiency.
• Our innovative external double bearing design effectively prevents medium intrusion, safeguarding against potential blocking and enhancing durability.
• With a thoughtfully engineered drain valve, we offer superior protection against medium corrosion, extending the life of your system.
• Crafted for extreme conditions, our high temperature design withstands heat up to an astonishing 800 ºC, ensuring optimal performance even in the most demanding environments.
• API607 Fire Protection Design ensures unparalleled safety and reliability in fire-prone scenarios.
• The integral stem design, combined with an anti-center shaft out feature, offers enhanced stability and security.
• An anti-static design is incorporated to mitigate risks, ensuring a seamless operational experience.
• Our expertly crafted anti-misoperation design minimizes human errors, providing peace of mind and confidence.
• Choose from multiple sealing structures, tailored to meet your specific needs and ensuring a perfect fit every time.
• Engineered with precision, the fabricated construction guarantees robustness and longevity.
• In the initial stage of opening and final stage of closing, the disc moves parallel to the body seat, providing a friction-free motion that enhances efficiency and reliability.
• A variety of seat arrangements are available, offering versatility and adaptability to suit diverse applications.
★ 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; 17-4PH
★ Operation Mode: Manual, Pneumatic, Electric, Electro-Hydraulic, etc.
★Product range can be expanded according to user needs
• Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting of the valve body, both internally and externally, ensuring a pristine finish
2. Post sandblasting, the surface achieves exceptional smoothness, significantly enhancing the adhesion of subsequent paint layers
3. For media with oxygen content above 23.5%, sandblasting is applied externally, whereas internal sandblasting becomes unnecessary•
• Painting after Surface Treatment
1. Our standard painted coatings boast temperature resistance up to 450°C, with specialized treatments available for even higher thermal demands
2. A robust dual-layer paint application, each layer 35 micrometers thick, provides durable corrosion protection
• Advanced Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The valve plate sealing surface can be reinforced with high-performance materials such as Hastelloy and Stellite Gr.6,
b) For extreme durability, we offer tungsten carbide and other hard alloy coatings, achieving hardness levels up to HRC60-70 Typical Product Application
Sulfur Tail Gas Recovery: Our advanced technology is pivotal in the efficient recovery of sulfur tail gases, enhancing sustainability and operational efficiency.
SINOCHEM GROUP Petrochemical Incineration Boiler Crossover: Delivering unparalleled performance, our products serve as the cornerstone in this complex and demanding application.stem: An essential component of our Four Lever Offset Shutoff Butterfly Valves, ensuring reliability and precision in high-pressure systems. Butterfly Valve (Crafted to perfection, our butterfly valves epitomize excellence in flow control for robust industrial environments.T: Our products represent the pinnacle of engineering and innovation, setting new standards in quality and performance.he right: Achieve maximum efficiency and reliability with our meticulously engineered butterfly valves, designed for high-pressure applications. figure: Witness the detailed engineering excellence that makes our products stand out in the industry, depicted in each blueprint and specification. is: Our commitment to excellence is reflected in every product we deliver, supported by industry-leading technologies and innovations. used product after: Experience the long-lasting durability of our solutions, proven effective even after years of rigorous use in demanding environments. 4 years): With a track record of excellence, our products maintain peak performance and reliability after years of service in challenging conditions.
Petro China 270,000 tons/year sulfur tail gas standard project: Contributing to large-scale projects, our solutions ensure optimal performance and compliance with industry standards.
catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Our innovative design replaces traditional methods, offering superior efficiency and reliability in gas turbine applications.
Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Witness the superior efficacy of our products in comparative scenarios, driving innovation and excellence.
Images from the scene: Capturing our products in action, these images showcase the robustness and effectiveness in real-world industrial settings. of: Integral components that form the backbone of our product lines, ensuring seamless integration and functionality. SINOCHEM GROUP: Partnering with industry leaders, we provide top-tier solutions that meet the sophisticated demands of global enterprises. Refining and Chemical: Our products are engineered to meet the exacting standards of the refining and chemical industries, ensuring safety and efficiency. catalytic flue gas turbine outlet: Designed for critical applications, our solutions excel in high-demand environments, providing unmatched reliability. to chimney: Ensuring the safe and efficient transition of gases through industrial systems, our products are a staple in modern industrial processes.
SNT Machinery (Qingdao) Co., Ltd is a pioneering force in the world of control valves, seamlessly merging manufacturing, innovative design, sales, and service into a cohesive powerhouse. Established with a cutting-edge foundation for rapid progress, SNT proudly finds its roots in Qingdao, Shandong province, sprawling over an impressive 42,000 square meters. Our state-of-the-art facilities boast modern workshops and advanced production equipment. We are a distinguished high-tech enterprise, possessing both independent intellectual property rights and a wealth of imported advanced management and production expertise. Our dynamic team comprises over 150 dedicated professionals, with 15% specializing in research and development, and 30% holding graduate or higher degrees. Through a commitment to excellence in production management and avant-garde technology research, we deliver high-quality valves extensively utilized across petrochemical, oil, and coal chemical industries. In 2017, we achieved an impressive sales milestone, nearing a remarkable 100 billion.
Today, SNT has secured the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001. We've also acquired esteemed net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovations are backed by numerous National Patents. We design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. Merging the superior attributes of world-renowned valves with our own independent research and development, we proudly produce an extensive 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, Cryogenic Valves, and more. Our driving forms encompass manual operation, power-driven, pneumatic, and hydraulic systems. We utilize top-grade materials for essential components such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", accommodating working pressures of ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.
Leveraging cutting-edge production technology management and a robust quality assurance system, SNT Valves are trusted worldwide in industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many more, all of whom rely on our products to fuel their success.
Placing our customers' profits at the forefront, we are dedicated to building a legacy of exceptional quality and a reputable brand. Our immaculate quality assurance and after-sales services ensure that SNT valves stand shoulder to shoulder with our valued clients, forging a path to mutual prosperity and shared success.
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.
