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 remarkable AOC-4000 series four-link eccentric butterfly valve, a marvel of engineering tailored for exceptional performance in extreme conditions. Perfectly designed for high-temperature, large-diameter, and high-flow applications, this valve excels where low-pressure drop and meticulous control are paramount. Its superior planar sealing ensures seamless operation, even under intense heat, effectively preventing any valve jamming. Distinguished by rapid opening and closing capabilities, this valve promises unmatched adjustment accuracy and dependable sealing. It shines in regulating or halting pipeline media crucial to phthalic anhydride and maleic anhydride production processes. Additionally, it's versatile for managing various gases and liquids, such as hydrogen, ammonia, air, smoke, and gas within pipeline systems. For those dealing with crystallization-prone media like sulfur, our innovative jacketed structure guards against unwanted blockages caused by cooling and condensation during flow. It's a solution tailored for excellence in every scenario.
The AOC-4000 series four-link eccentric butterfly valve is crafted to offer flexibility and adaptability, coming standard with a reliable cylinder-type single-acting actuator. However, customizing the actuator to meet specific needs is straightforward, with options including cylinder-type double-acting, electric, and hydraulic actuators available. This flexibility ensures optimal performance tailored to your requirements. The valve's efficiency is further highlighted by its impressively swift shut-off times, ranging from a mere 2 to 6 seconds, ensuring rapid response when you need it most.Working PrincipleDiscover the sophisticated mechanics behind the four-link butterfly valve, meticulously crafted to ensure seamless operation. At its core, this valve comprises a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The drive device orchestrates the valve's opening and closing, activating the valve shaft and its four-link mechanism with precision. As the valve shaft turns, it opens the valve plate, and when aligned parallel to the pipeline center, the valve is in its fully open state. Conversely, the reverse rotation brings the valve plate to a close, compressing against the valve body's sealing surface, achieving a perfect seal when fully closed. This ingenious design ensures flawless operation with each cycle.Body: Constructed with premium materials, the body of our Four Lever Offset Shutoff Butterfly Valves ensures unmatched durability and strength, providing a robust solution engineered to withstand challenging environments while maintaining top-notch efficiency and functionality.
| 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 - built to accommodate expansive industrial applications seamlessly.
• Unique four-stem structure design, featuring a flat seal design that ensures unrivaled performance and reliability.
• External double bearing design expertly prevents medium entry into the bearing, eliminating risks of blockage and promoting smooth operation.
• Incorporated drain valve that effectively counters medium corrosion, extending valve longevity and maintenance efficiency.
• Designed to withstand extreme conditions with a high temperature rating up to 800 ºC, offering exceptional resilience and durability.
• API607 Fire Protection Design ensures optimal safety and compliance with stringent industry standards.
• Integral stem design with anti-center shaft out features, providing steadfast security and operational integrity.
• Incorporates an anti-static design to prevent electrical hazards and enhance user safety.
• Anti-misoperation design - crafted to prevent errors, ensuring user trust and operational precision.
• Offers multiple sealing structures for options, tailored to meet diverse application needs with precision.
• High-quality fabricated construction that promises robust performance and lasting strength.
• In the initial stage of opening and final stage of closing, the disc moves parallel to the body seat, providing a friction-free motion for smoother operation.
• Various seat arrangement options, allowing customization to suit specific operational environments.
★ Cutting-edge Design Standards: AP1598API607ASMEB16.34 - Ensuring unmatched precision and industry compliance
★ Standard Size Range: NPS12-160 (DN300-DN4000) - Versatile solutions for varied applications
★ Pressure Handling: Class: PN2.5-PN20/ASME CLASS 150 - Robust and reliable for demanding conditions
★ Applicable Temperature Range: -20 °C ~ 800 °C - Designed for extreme thermal conditions
★ Leakage Standards: Class: ANSI B16.104 VI, API 598 - Guaranteed no leakage, ensuring top-notch sealing performance
★ Durable Body Materials: ASTM A105, A351 CF8M/special alloy options available for enhanced performance
★ High-Quality Valve Internals Materials: A479-316; S2205; 17-4PH - Engineered for longevity and reliability
★ Versatile Operation Modes: Manual, Pneumatic, Electric, Electro-hydraulic - Flexible control options
★Our product range is adaptable and can be expanded according to your bespoke needs, ensuring tailor-made solutions for every challenge
• Premium Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting both inside and outside of the valve body ensures optimal surface quality.
2. Achieve a refined surface post-sandblasting, promoting exceptional paint adhesion.
3. When the O2 content in the mediumum exceeds 23.5%, only external sandblasting is necessary, eliminating the need for internal processing.•
• Advanced Painting after Completing Surface Treatment
1. Our standard painted surface withstands temperatures up to 450°C, with options for specialized treatments to endure even higher heat.
2. Dual-layer paint application, each at 35 micrometers thickness, ensures robust corrosion resistance.
• Innovative Hard Alloy Surfacing on the Sealing Surface of the Valve Plate
a) The sealing surface of the valve plate can be enhanced with Hastelloy, Stellited gr.6 welding,
b) Tungsten carbide and other hard alloy coatings, achieving a remarkable hardness level of HRC60-70. Typical Product Application
Expert use in Sulfur Tail Gas Recovery
SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-Lever Offset ShutdownStem Operation Innovative Butterfly Valve (The right figure is precisely used product after 4 years of reliable service)
Petro China 270,000 tons/year advanced sulfur tail gas standard project
upgraded catalytic flue gas turbine outlet butterfly valve replacing traditional water seal tank
Detailed comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler at the industrial site
Vivid images from the scene of SINOCHEM GROUP Refining and Chemical catalytic flue gas turbine outlet leading seamlessly to the chimney
SNT Machinery (Qingdao) Co., Ltd is a distinguished leader in the production of advanced control valves, seamlessly integrating manufacturing, design, sales, and service into a cohesive enterprise. Embarking on a journey of high innovation and rapid growth, SNT is nestled in the vibrant city of Qingdao, Shandong Province, sprawling across a modern, expansive 42,000 square meters. Our state-of-the-art facilities are equipped with cutting-edge production technology, rendering us a high-tech enterprise with independent intellectual property rights and global management and production insights. Our team is comprised of over 150 dedicated professionals, with 15% of them specializing in R&D and 30% holding graduate or higher degrees. This talented team drives our pioneering spirit and excellence in quality management, enabling us to produce a vast array of superior valves essential to petrochemical, oil, and coal chemical industries. In 2017, we proudly achieved a sales revenue nearing 100 billion, underscoring our commitment to quality and innovation.
SNT has achieved significant milestones including the prestigious TS special equipment manufacturing certificate and ISO 9001 accreditation. As a testament to our industry leadership, we hold the net qualification certificate from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside several national patents in pioneering technologies. Our capabilities extend to designing and manufacturing an array of sophisticated valves adhering to ANSI, API, DIN, BS, and JIS standards. By melding the finest attributes of globally acclaimed valves with our independent research and development, SNT produces a diverse suite of valves such as GLOBE, 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 drive mechanisms include manual, power-driven, pneumatic, and hydraulic options. We employ premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", and operational pressures from ANSI 150# to 2500#, catering to working temperatures between -196ºC and 1100ºC.
With our robust production technology, meticulous management, and unwavering quality assurance systems, SNT Valves have become indispensable across multiple industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele incorporates major industry players such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, among others. These partnerships are a testament to our reliability and performance in delivering exceptional valve solutions.
At SNT, we prioritize our customers' success, dedicating ourselves to establishing an unparalleled quality standard and a distinguished brand. Our comprehensive quality assurance and after-sales systems ensure that we forge enduring partnerships with our clients, collaborating to create mutual prosperity and success. Join us as we continue to push the boundaries of excellence and innovation in the valve industry.
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.
