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
SNT VALVE excels in the development and innovation of high-temperature flue gas device butterfly valves. To address the challenges mentioned above, SNT VALVE pioneered the introduction of a four- levereccentric butterfly valve, replacing the conventional tri- eccentric butterfly valves. This innovation,has been a game-changerin the industry. Itoperates with unparalleled efficiency, successfully overcoming longstanding issues, earning two national patents: a four-lever eccentric butterfly valve (patent No.: ZL201520326489.1) and a catalytic device featuring a four-lever eccentric butterfly valve (patent No.: ZL201921719624.3). This has been recognized by the China Petroleum and Chemical Industry Federation which conducted a thorough product assessment in partnership with Changzhou Universityand the result has been acknowledgedas leading in the domestic sphere.
SNT VALVE is specialized in the research of high temperature flue gas device butterfly valve. For the above problems, SNT VALVE proposed to use four-stem eccentric butterfly valve instead of tri-eccentric butterfly valve and aeration butterfly valve as a solution in the industry for the first time, successfully solved the problem for many years, applied for two national patents: a four-stem eccentric butterfly valve (patent No.: ZL201520326489.1 and catalytic device with four-stem eccentric butterfly valve (patent No.: ZL201921719624.3), and commissioned China Petroleum and Chemical Industry Federation wot conduct product identification with Changzhou University, which was awarded as the domestic leader.
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 engineered to excel in high-temperature environments, accommodating large diameters, high flow rates, and ensuring minimal pressure drop. With its cutting-edge planar sealing technology, this valve guarantees zero leakage and effectively prevents jamming even under extreme heat. Experience swift opening and closing dynamics, achieving unparalleled adjustment accuracy alongside robust sealing capabilities. Perfectly tailored for the precise regulation or complete shut-off of pipeline media in the production of phthalic and maleic anhydrides, it also excels in managing 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 integrated to avert blockages caused by cooling and condensation during flow.
The versatile AOC-4000 series four-link eccentric butterfly valve is designed to adapt to your specific needs. Typically outfitted with a cylinder-type single-acting actuator, it offers the flexibility to incorporate cylinder-type double-acting actuators, as well as electric and hydraulic actuators, based on your operational requirements. Remarkably, the minimum shut-off time can be as brief as 2 to 6 seconds, ensuring quick and efficient flow control.Working PrincipleAt the heart of the four-link butterfly valve lies a symphony of engineering excellence, comprising a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The opening and closing mechanism is powered by the drive device, engaging the valve shaft and the four-link system with precision. As the valve shaft rotates, it orchestrates the opening of the valve plate, achieving full openness when parallel to the pipeline center. Conversely, the reverse rotation prompts closure, as the valve plate meets and compresses against the sealing surface of the valve body, ensuring a complete seal when fully closed.Body: Crafted with unparalleled attention to detail, the body of our Four Lever Offset Shutoff Butterfly Valves is engineered to withstand the most demanding conditions. Utilizing high-grade materials and state-of-the-art technology, the body ensures a perfect blend of strength and durability for a longer operational lifespan.
| 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 up to DN4000, the connecting valve body is engineered to accommodate extensive operational requirements.
• Featuring a distinctive four-stem structure design with a flat seal design that ensures superior sealing performance and reliability.
• The innovative external double bearing design effectively prevents medium infiltration, safeguarding against blockage and ensuring seamless operation.
• A strategically placed drain valve acts as a robust barrier against medium-induced corrosion, preserving the valve's integrity and longevity.
• Capable of withstanding high temperatures up to an extraordinary 800 ºC, this design thrives in the most demanding environments.
• Equipped with API607 Fire Protection Design, ensuring exceptional safety and compliance with industry standards.
• The integral stem design is meticulously engineered with an anti-center shaft out feature, providing unmatched operational efficiency.
• Incorporating an anti-static design to guard against static electricity, enhancing overall safety and performance.
• Designed with an anti-misoperation feature to prevent accidental engagements, ensuring precise control and reliability.
• Offering multiple sealing structures for selection, catering to diverse operational needs and ensuring optimal adaptability.
• Fabricated construction for superior structural integrity and longevity, tailored to withstand rigorous applications.
• In the initial stage of opening and the final stage of closing, the disc moves parallel to the body seat, providing a friction-free motion for smooth and efficient operation.
• With various seat arrangements available, this product line offers flexibility to meet specific operational conditions and requirements.
★ Design Standard: Crafted to meet elite benchmarks, ensuring top-tier quality and reliability. AP1598, API607, ASME B16.34 - benchmarks of excellence in the industry.
★ Standard Size: Flexibility and power in a range designed to suit diverse needs. NPS 12-160 (DN 300-DN 4000) - catering to all your dimensional requirements.
★ Pressure: Engineered to withstand varying degrees of pressure with precision. Class: PN 2.5-PN 20 / ASME CLASS 150 - reliable under rigorous conditions.
★ Applicable Temperature: Resilience across extreme environments. -20°C to 800°C - maintaining performance in every climate.
★ Leakage: Designed for impeccable sealing integrity. Class:ANSI B16.104 VI, API 598 - ensuring zero compromise on quality. No leakage - guaranteed performance.
★ Body Material: Robust and versatile.ASTM A105, A351 CF8M, and special alloys - tailored for strength and durability.
★ Valve Internals Material: Unmatched quality inside out. A479-316, S2205, 17-4PH - the core of excellence.
★ Operation Mode: Adaptability at its finest. Manual, pneumatic,electric, electro-hydraulic, etc. - flexibility in control.
★Product Range can be expanded according to user needs - catering to your unique demands.
• Sand Blasting Surface Treatment SA2.5
1. Complete sandblasting of valve body, both internally and externally, ensures immaculate cleanliness and performance.
2. The meticulous sandblasting process results in a refined surface finish with exceptional paint adhesion capabilities.
3. In cases where the oxygen content in the medium exceeds 23.5%, external sandblasting is recommended, eliminating the need for internal sandblasting.•
• Painting after Surface Treatment
1. Our standard painted surfaces boast remarkable temperature resistance of up to 450°C, with specialized treatments available for even higher thresholds.
2. Dual coats of paint, each at 35 micrometers, provide a formidable barrier against corrosion, ensuring long-lasting durability.
• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The state-of-the-art sealing surface of the valve plate can be enhanced with a weld overlay of Hastelloy or Stellited gr.6,
b) Advanced tungsten carbide and other hard alloy sprays can be applied, achieving a remarkable hardness of HRC60-70. Typical Product Application
Sulfur Tail Gas Recovery
SINOCHEM GROUP Petrochemical Incineration Boiler Crossover - An Essential IntegrationStem Butterfly Valve (TThe right figure is used product after 4 years)
Petro China 270,000 Tons/Year Sulfur Tail Gas Standard Project
Catalytic Flue Gas Turbine Outlet Butterfly Valve, Innovatively Replacing Water Seal Tank
Comparison of SINOPEC Catalytic Flue Gas Turbine Outlet to Heat Recovery Boiler Site
Images Capturing the Essence of SINOCHEM GROUP Refining and Chemical Catalytic Flue Gas Turbine Outlet to Chimney
SNT Machinery (Qingdao) Co., Ltd., a distinguished innovator in control valve production, seamlessly integrates design, manufacturing, sales, and service. With a strategic foundation for rapid advancement, SNT is headquartered in the vibrant city of Qingdao, Shandong province. We proudly span 42,000 m2, boasting state-of-the-art workshops and production facilities. As a forward-thinking high-tech enterprise, we hold exclusive intellectual property rights, and our operations are enriched by cutting-edge management and production expertise from abroad. Our talented workforce of over 150 includes a dynamic team where 15% are R&D specialists and 30% hold graduate or higher degrees. Anchored by an exceptional production management team and trailblazing R&D, we excel in crafting premium valves for the petrochemical, oil, and coal chemical sectors. Our impressive sales reached nearly 100 billion in 2017, a testament to our quality and innovation.
SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification. We've also secured key net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further underscored by numerous National Patents. We specialize in the design and manufacture of a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By merging global valve advancements with our proprietary R&D, we produce an extensive portfolio, 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, and Cryogenic Valves. Our versatile drive options encompass manual, power-driven, pneumatic, and hydraulic operations. We utilize premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, and offer specifications from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and temperatures ranging from -196ºC to 1100ºC.
Leveraging sophisticated production technology management and a robust quality assurance framework, SNT Valves are trusted by industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC's QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, SINOPEC Changling, Jinan branches, and more. Our reputation for reliability and excellence positions us as a preferred partner in these critical sectors.
At SNT Machinery, client success is our paramount priority. We are dedicated to crafting superior quality products and building a renowned brand. Our comprehensive quality assurance and after-sales service systems ensure that SNT valves not only meet but exceed expectations, fostering long-lasting partnerships and shared success with all our customers.
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.
