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 of four-link eccentric butterfly valves, your go-to solution for high-temperature, large-diameter, high-flow applications requiring minimal pressure drop and zero leakage. This series excels with its exceptional planar sealing capabilities, eliminating valve jamming even under intense heat. It promises swift operation with rapid opening and closing, ensuring precise adjustment and dependable sealing. These features make it an ideal choice for regulating or shutting off pipeline media, particularly in the production processes of phthalic anhydride and maleic anhydride. Furthermore, it adeptly manages various gases and liquids, including hydrogen, ammonia, air, smoke, and gas within pipeline systems. For media susceptible to crystallization, such as sulfur, a jacketed structure is available to avert pipeline blockages caused by cooling and condensation during flow.
The AOC-4000 series four-link eccentric butterfly valve often comes equipped with a cylinder-type single-acting actuator. However, customization is at your fingertips with options like cylinder-type double-acting actuators, electric actuators, and hydraulic actuators based on your system's demands. Enjoy unparalleled efficiency with a minimal shut-off time ranging between an impressive 2 to 6 seconds.Working PrincipleAt the heart of the four-link butterfly valve lies a sophisticated synergy of components including a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The operation is powered by the drive device, which manipulates the valve shaft and activates the four-link mechanism. As the valve shaft rotates, it opens the valve plate; full openness is achieved when the plate aligns parallel to the pipeline's center. Conversely, the reverse rotation seals the valve, as the plate contacts and compresses against the valve body's sealing surface, ensuring complete closure.Body: The cornerstone of durability and reliability, engineered with precision to ensure optimal performance and long-lasting use.
| 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 |
• Our impressive butterfly valves boast a connecting valve body with an exceptional maximum diameter reaching up to DN4000.
• Revolutionary four-stem structure design coupled with a flat seal design ensures enhanced performance and reliability.
• The innovative external double bearing design effectively prevents medium from infiltrating the bearing, thus eliminating any risk of blockage.
• Our specialized drain valve offers superior protection against medium-induced corrosion, ensuring durability.
• Engineered for high temperatures, our design withstands heat up to an impressive 800 ºC, making it suitable for the most demanding applications.
• Compliant with API607 standards, our fire protection design delivers safety and peace of mind.
• Our integral stem design includes an anti-center shaft out feature, enhancing security and stability.
• Incorporating an anti-static design, our valves ensure safe operation in volatile environments.
• Equipped with an anti-misoperation design to prevent accidental mishandling.
• Choose from multiple sealing structures to perfectly match your specific needs.
• Fabricated construction delivers robustness and reliability for sustained performance.
• During both the initial opening and final closing stages, the disc executes a parallel motion to the body seat, providing a seamless and friction-free operation.
• Various seat arrangements are available, allowing for customized solutions tailored to your requirements.
★ Design standard: AP1598, API607, ASME B16.34 - Our valves are crafted following these renowned international design standards ensuring top-tier quality and reliability.
★ Standard size: NPS12-160 (DN300-DN4000) - This extensive range caters to a multitude of applications, offering versatility and adaptability to meet diverse operational needs.
★ Pressure class: PN2.5-PN20 / ASME CLASS 150 - Experience optimal performance and stability with our valves designed for these pressure classes.
★ Applicable temperature: -20°C ~ 800°C - Our butterfly valves are engineered to withstand extreme temperatures, making them suitable for a wide array of industrial environments.
★ Leakage class: ANSI B16.104 VI, API598 - Crafted to perfection, our valves ensure minimal leakage complying with these rigorous standards. no leakage
★ Body material: ASTM A105, A351 CF8M /special alloy, etc. - Select from robust materials that guarantee durability and longevity under challenging conditions.
★ Valve internals material: A479-316, S2205, 17-4PH - Our valve internals are crafted from superior materials, enhancing resilience and performance.
★ Operation mode: manual, pneumatic, electric, electro-hydraulic, etc. - Choose from various operation modes to suit your specific control and automation needs.
★Product range can be expanded according to user needs - We offer customization options to tailor our products to your unique specifications.
• Sand Blasting Surface Treatment SA2.5
1. Experience a pristine and flawless finish with our meticulous sandblasting process applied both inside and out of the valve body.
2. Achieve an extraordinarily fine and smooth surface post-sandblasting, ensuring superior paint adhesion that stands the test of time.
3. For environments where the oxygen content in the medium exceeds 23.5%, enjoy enhanced safety with external sandblasting. Internal sandblasting becomes optional, maintaining structural integrity without compromise.•
• Painting after Surface Treatment
1. Our standard painted surfaces boast remarkable temperature resistance up to 450°C, with options available for specialized treatment at even higher temperatures, catering to your specific needs.
2. For unparalleled corrosion protection, our diligent application of two coats of paint, each 35 micrometers thick, ensures long-lasting durability and aesthetic appeal.
• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) Elevate the performance of the valve plate with our state-of-the-art welding techniques, featuring Hastelloy, Stellited gr.6 for an impervious sealing surface.
b) Employ cutting-edge hard alloy spraying techniques using Tungsten carbide and others, achieving an impressive hardness level of up to HRC60-70 for unmatched durability. Typical Product Application
Sulfur Tail Gas Recovery: Exceptional Efficiency
SINOCHEM GROUP Petrochemical: Incineration Boiler Crossover Four-Stem: Unmatched Performance Butterfly Valve (Theillustrated diagram demonstrates an extensively utilized product after a span of 4 years)
Petro China: 270,000 tons/year sulfur tail gas benchmark project
Innovative Retrofit: Catalytic flue gas turbine outlet butterfly valve replacing traditional water seal tank
Comparative Analysis at SINOPEC: Catalytic flue gas turbine outlet to heat recovery boiler site
Visual Depictions from the Field of SINOCHEM GROUP Refining and Chemical Process: A Glimpse Catalytic flue gas turbine outlet directly connected to chimney
SNT Machinery (Qingdao) Co., Ltd. is a distinguished powerhouse in the realm of control valves, seamlessly merging innovative manufacturing, cutting-edge design, strategic sales, and comprehensive services. Nestled in the vibrant city of Qingdao, Shandong Province, our sprawling facility spans 42,000m², boasting state-of-the-art workshops and advanced production equipment. As a beacon of high-tech innovation, we pride ourselves on our proprietary intellectual property and the integration of global management and production expertise. Our dynamic team exceeds 150 professionals, with 15% dedicated R&D specialists and 30% holding graduate or higher degrees. Through our unwavering commitment to superior production management and pioneering research, we deliver thousands of premium valves utilized across the petrochemical, oil, and coal chemical sectors. In 2017, we proudly achieved a sales milestone nearing 100 billion.
SNT has proudly secured the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside the esteemed net qualification credentials from industry giants SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological advancements have garnered numerous National Patents, empowering us to design and produce a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By blending global valve excellence with our independent R&D prowess, we manufacture an extensive variety of valves, including Globe Valves, High-Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, T 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 operational modalities span manual, power-driven, pneumatic, and hydraulic drives. Constructed with premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, our valves cover specifications from 1/2" to 120", with working pressures ranging ANSI 150# to 2500#, and temperatures from -196ºC to 1100ºC.
Driven by cutting-edge production technology, superior management, and a stringent quality assurance system, SNT Valves have become synonymous with reliability across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes stalwarts like SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, SINOPEC Qingdao Refinery, SINOPEC Changling Branch, and Jinan Branch, to name just a few.
With an unwavering focus on maximizing customer profits, SNT is dedicated to crafting exceptional quality and establishing a revered brand reputation. Our impeccable quality assurance and after-sales frameworks ensure that SNT valves foster enduring partnerships with all our clients, paving the path to shared success and prosperity.
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.
