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 Application: Discover the groundbreaking AOC-4000 series,crafted by SNT, which serves as a premier regulating and shut-off valve for special conditions-marking a new era of efficiency and reliability.
Discover the AOC-4000 series, a marvel in four-link eccentric butterfly valve technology, meticulously crafted to thrive in high-temperature, large-diameter, and high-flow environments. With its superb planar sealing performance, this valve effortlessly prevents jamming at elevated temperatures, ensuring seamless operation even under the most demanding conditions. Engineered for rapid opening and closing, it boasts exceptional adjustment precision and dependable sealing, making it ideal for regulating or halting pipeline media in the intricate production processes of phthalic anhydride and maleic anhydride. Its versatility extends to the control of various gases and liquids, including hydrogen, ammonia, air, smoke, and gas within pipeline systems. For media susceptible to crystallization, such as sulfur, a specialized jacketed structure can be incorporated to avert pipeline blockages caused by cooling and condensation during flow.
The AOC-4000 series four-link eccentric butterfly valve is meticulously designed for flexibility, typically featuring a cylinder-type single-acting actuator. However, for tailored solutions, you can opt for cylinder-type double-acting actuators, electric actuators, or hydraulic actuators, depending on your specific needs. Impressively, it achieves a minimum shut-off time ranging from just 2 to 6 seconds, ensuring swift and efficient operation.Working PrincipleAt the heart of the four-link butterfly valve's ingenuity lies its intricate system composed of a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The valve's seamless opening and closing operations are instigated by the drive device, which propels the valve shaft alongside the four-link mechanism. As the valve shaft rotates, the valve plate unfurls, aligning parallel to the pipeline center to signify full opening. Conversely, the reverse rotation orchestrates the closure of the valve plate, culminating in a full seal when the plate meets and compresses against the valve body's sealing surface. This precision engineering ensures optimal flow control and sealing integrity, enhancing process reliability.Body: Crafted with precision and crafted from top-tier materials, the body of our valves ensures durability and reliability, becoming the bedrock of operational excellence.
| 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 a maximum diameter for the connecting valve body of up to DN4000, this engineering marvel epitomizes robustness and adaptability.
• Innovatively crafted with a unique four-stem structure design and complemented by a flat seal design, ensuring unparalleled sealing efficiency and integrity.
• The external double bearing design meticulously prevents medium infiltration, safeguarding against bearing blockages and optimizing longevity.
• The cleverly integrated drain valve effectively prevents medium corrosion, enhancing the valve's durability and lifespan.
• Engineered for resilience, the high-temperature design withstands extreme conditions up to a remarkable 800 ºC,
• featuring an API607 Fire Protection Design to ensure safety and reliability under critical scenarios.
• With an integral stem design and anti-center shaft disengagement feature, these valves promise unwavering stability and safety.
• Enhanced with an anti-static design to avert static build-up, ensuring seamless operations.
• Equipped with an anti-misoperation design to prevent inadvertent usage errors, optimizing operational security.
• Offer versatility with multiple sealing structures available for selection, catering to diverse application needs.
• Masterfully constructed with a fabricated design for superior performance and durability.
• During both the initial opening and final closing phases, the disc performs a friction-free motion by moving parallel to the body seat.
• Provides various seat arrangements to accommodate specific operational requirements and preferences.
★ Design standard: AP1598, API607, ASME B16.34
★ Standard size: NPS 12-160" (DN 300-4000)
★ 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
• Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting on both the interior and exterior of the valve body for a pristine finish and optimal surface preparation.
2. Achieve a refined surface post-sandblasting, ensuring robust paint adhesion for enduring performance.
3. Should the oxygen content within the medium exceed 23.5%, opt for external sandblasting only, as internal sandblasting becomes unnecessary.•
• Painting after Surface Treatment
1. Standard protective paint offers resistance to temperatures soaring up to 450°C. For extreme conditions, specialized treatments are available.
2. Enhanced with two layers of 35-micrometer thick paint, expertly applied to guard against corrosive forces.
• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) Valve plate sealing surfaces can be fortified through welding with advanced alloys like Hastelloy and Stellited gr.6, offering superior durability.
b) Employ tungsten carbide and other state-of-the-art hard alloy spraying techniques, achieving remarkable hardness levels of HRC60-70. Typical Product Application
Sulfur Tail Gas Recovery: Our cutting-edge Four Lever Offset Shutoff Butterfly Valves are meticulously engineered for unparalleled efficiency in sulfur tail gas recovery applications, ensuring optimal performance and reliability.
SINOCHEM GROUP Petrochemical Incineration Boiler Crossover: A robust solution tailored for the demanding environments of petrochemical incineration, providing superior control and durability.stem Butterfly Valve (The right figure is used product after 4 years)
Petro China 270,000 tons/year sulfur tail gas standard project: Our valves excel in high-capacity operations, replacing traditional methods with innovative flow control solutions that enhance efficiency and safety.
Catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Engineered for excellence, this application significantly improves throughput and reduces maintenance requirements.
Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Our butterfly valves deliver unmatched performance in heat recovery applications, optimizing energy efficiency and reducing environmental impact.
Images from the scene of SINOCHEM GROUP Refining and Chemical: Trusted by industry leaders, our valves are a testament to SNT Machinery's commitment to innovation and quality. Catalytic flue gas turbine outlet to chimney: Facilitating seamless transitions, our butterfly valves ensure smooth operations and minimal downtime in industrial applications.
SNT Machinery (Qingdao) Co., Ltd. stands as a pioneering force in the production of control valves, seamlessly integrating manufacturing, design, sales, and service to deliver comprehensive solutions. Strategically located in Qingdao, Shandong province, SNT covers an expansive 42,000 square meters, featuring state-of-the-art workshops and production facilities. As a high-tech enterprise with proprietary intellectual property rights, SNT boasts advanced management and production techniques imported from industry leaders. With a dedicated workforce of over 150, a notable 15% comprises R&D specialists, while 30% are graduates or possess higher degrees. Anchored by a high-caliber production management team and a commitment to innovative technology, SNT excels in producing top-tier valves for the petrochemical, oil, and coal chemical sectors. Remarkably, the company's sales surged to nearly 100 billion in 2017.
SNT Machinery is proud to have received the TS special equipment manufacturing certificate and ISO 9001 accreditation. Furthermore, we hold net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside numerous national patents for our cutting-edge technologies. Our engineering prowess enables us to design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By synergizing the benefits of renowned global valves with our independent research and development, SNT crafts an array of valves such as GLOBE, High Pressure Boiler Blow-down Valves, and High-performance Butterfly Valves, among others. Available in specifications from 1/2" to 120" with working pressures from ANSI 150# to 2500#, and temperatures ranging from -196ºC to 1100ºC, our products are engineered for diverse applications across manual, power-driven, pneumatic, and hydraulic operations. We utilize premium materials including A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M to ensure exceptional reliability and performance.
With a foundation built on cutting-edge production technology and a robust quality assurance system, SNT valves are extensively employed across petrochemical, oil, steel & iron, paper manufacturing, and power station sectors. Our esteemed clientele encompasses industry leaders such as SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, SINOPEC Qingdao Refinery, and many more, demonstrating our widespread impact and trusted reputation.
Placing our customers' profitability at the heart of our mission, SNT is dedicated to cultivating unmatched quality and a distinguished brand. Our impeccable quality assurance and after-sales support systems are designed to foster long-lasting partnerships, ensuring that SNT valves drive prosperity for 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.
