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
In recent years, With the improvement of industry and the requirements of energy conservation and environmental protection policy, the cut-off butterfly valve has been more and more widely used. In the prior technology, the tri-eccentric butterfly valve belongs to torque sealing, and the valve plate is closed more tightly by the torque of the actuator to achieve the sealing effect. However, in some special occasions (such as high temperature catalytic flue gas, gas, sulfur tail gas and other media, the temperature reaches 800°C), due to the existence of thermal expansion stress, the valve will not be able to open, easy to cause serious consequences such as tri-eccentric butterfly valve stuck, affecting industrial production, causing huge economic losses, and even cause safety accidents.
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.
The AOC-4000 series four-link eccentric butterfly valve is your ultimate solution for sophisticated industrial needs, tailored for environments demanding high temperature endurance, accommodating large diameters, and managing high flow rates, while ensuring minimal pressure drops and leakage. Its state-of-the-art planar sealing technology ensures seamless operation, even at elevated temperatures, eliminating the risk of valve jamming. With an emphasis on rapid open-close functionality, the valve provides unmatched accuracy in adjustments and dependable sealing. This makes it an ideal choice for managing pipeline media within the intricate production processes of phthalic anhydride and maleic anhydride. Moreover, its versatility extends to the control of various gases and liquids, including hydrogen, ammonia, air, smoke, and gas within your pipeline systems. The added option of a jacketed structure offers a perfect solution for media susceptible to crystallization, such as sulfur, effectively preventing blockages from cooling and condensation during flow.
The AOC-4000 series four-link eccentric butterfly valve is expertly designed to typically incorporate a cylinder-type single-acting actuator, but versatility is at its core. Depending on your specific operational requirements, this valve can also be equipped with cylinder-type double-acting actuators, electric actuators, or hydraulic actuators, ensuring optimal performance tailored to your needs. Astonishingly, the valve can achieve a swift shut-off time ranging between 2 to 6 seconds, demonstrating its efficiency and reliability in critical applications.Working PrincipleThe four-link butterfly valve is an engineering marvel, composed of key components such as a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The opening and closing operations are masterfully driven by the drive device, which initiates movement in the valve shaft and the innovative four-link mechanism. As the valve shaft rotates, it opens the valve plate, achieving a fully open state when the plate aligns parallel to the pipeline's center. Conversely, a reverse rotation closes the valve plate, and upon contact and compression with the valve body's sealing surface, the valve attains full closure, ensuring a secure and precise sealing solution.Body: At the core of the SNT Machinery (Qingdao) Co., Ltd.'s engineering marvel is the robust body. Engineered to withstand the rigors of various industrial and commercial environments, the body of our butterfly valve promises longevity and strength, ensuring seamless integration into your existing systems with unparalleled ease. Experience the blend of innovation and functionality that defines our product.
| 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
• Unique four-stem structure design, flat seal design
• External double bearing design prevents medium from entering the bearing and causing blocking
• Drain valve prevents medium corrosion
• High temperature design up to 800 ºC
• API607 Fire Protection Design
• Integral stem design, anti-center shaft out design
• Anti-static design
• Anti-misoperation design
• Multiple sealing structures for option
• Fabricated construction
• In the initial stage od opening and final stage od closing, the disc moves parallel to the body seat provinding a friction-free motion.
• Various seat arrangement
★ Design Standard: AP1598, API607, ASME B16.34
★ Standard Size: NPS 12-160 (DN300-DN4000)
★ Pressure Rating: Class: PN2.5-PN20 / ASME CLASS 150
★ Applicable Temperature Range: -20°C to 800°C
★ Leakage Specification: Class: ANSI B16.104 VI, API 598 No Leakage
★ Body Material: ASTM A105, A351 CF8M /Special Alloys, etc.
★ Valve Internals Material: A479-316; S2205; 17-4PH
★ Operation Mode: Manual, Pneumatic, Electric, Electro-Hydraulic, etc.
★The product range can be expanded to meet user-specific needs.
• Sand Blasting Surface Treatment SA2.5
1. Both the interior and exterior of the valve body undergo comprehensive sandblasting.
2. The post-sandblast finish is exceptionally smooth, ensuring superior paint adhesion.
3. For media with an O2 concentration um greater than 23.5%, only external sandblasting is necessary; internal is optional.•
• Painting after Surface Treatment
1. Our standard painted surfaces resist temperatures up to 450°C, with custom solutions for higher heat resistance available.
2. A dual-layer paint application, each 35 micrometers thick, provides robust corrosion protection.
• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The valve plate's sealing surface can be fortified with Hastelloy, Stellited gr.6,
b) or enhanced with tungsten carbide and other hard alloys, reaching hardness levels of HRC60-70. Typical Product Application
Optimizing Efficiency in Sulfur Tail Gas Recovery
SINOCHEM GROUP: Leading the Way with Petrochemical Incineration Boiler Crossover Four-Stem Technology Innovative Butterfly Valve (TThe highlighted diagram illustrates a product that has been employed after four successful years)
Petro China's Landmark 270,000 tons/year Sulfur Tail Gas Standard Project
Revolutionary catalytic flue gas turbine outlet butterfly valve, replacing traditional water seal tanks
A Detailed Comparison of SINOPEC's Catalytic Flue Gas Turbine Outlet and Heat Recovery Boiler Site
Captivating Imagery from the Scene at the renowned SINOCHEM GROUP Refining and Chemical Division showcasing catalytic flue gas turbine outlet leading elegantly to the chimney
SNT Machinery (Qingdao) Co., Ltd is a distinguished leader in the control valves industry, seamlessly integrating manufacturing, design, sales, and services to deliver exceptional solutions. With a strategic location in the vibrant city of Qingdao, Shandong province, our expansive 42,000m2 facility is equipped with state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise boasting independent intellectual property rights, we leverage advanced management and production practices from around the globe. Our dynamic workforce comprises over 150 dedicated professionals, including 15% R&D specialists and 30% graduates or individuals with higher degrees. Our commitment to quality and innovation fuels our capacity to produce top-tier valves, serving the petrochemical, oil, and coal chemical sectors. In 2017, we proudly achieved a sales value nearing 100 billion.
SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside net qualification certificates from esteemed entities such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents in cutting-edge technologies, we excel in designing and manufacturing a comprehensive array of valves that adhere to ANSI, API, DIN, BS, and JIS standards. By synthesizing global valve innovations with our own research and development, we expertly craft an extensive range of valves, including 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, Cryogenic Valves, among others. Our robust driving forms encompass manual, power-driven, pneumatic, and hydraulic operations. The main components are fashioned from premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, ensuring specifications of 1/2"~120", withstanding working pressures of ANSI 150#~2500#, and operating temperatures ranging from -196ºC to 1100ºC.
Backed by our cutting-edge production technology, sophisticated management, and unwavering quality assurance system, SNT Valves are the preferred choice across an array of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and others, entrust us with their critical operations, reinforcing our reputation for excellence.
At SNT, we prioritize our users' profitability, passionately dedicating ourselves to establishing a brand synonymous with outstanding quality and reliability. Our impeccable quality assurance and comprehensive after-sales support systems ensure that SNT valves consistently exceed customer expectations, fostering mutual prosperity and 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.
