Hrad Seal/Soft Seal for Four Lever Offset Shutoff Butterfly Valves for Nps 12-160" Pressure Systems with Carbon Steel Materials

• Customization: Available
• Media: Gas
• Driving Mode: Pneumatic
• Model NO.: AOC-430
• Connection Form: Flange
• Structure: Eccentric
• Seal Form: Supercharging Pressured Sealed
• Valve Stem: Link
• Work Pressure: High Pressure (10.0mpa< Pn <80.0mpa)
• Working Temperature: High Temperature (T>450°C)
• Material of Seal Surface: Soft Sealed
• Standard: Sil/API
• 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
• Transport Package: Wooden
• Trademark: SNT
• Origin: China
• HS Code: 8481804090
• Production Capacity: 500000PCS/Year

Product Description

About SNT Butterfly Valves

In recent years, as the industry advances with remarkable strides, and with a heightened focus on energy conservation and steadfast environmental protection policies,the utilization of cut-off butterfly valves has surged dramatically. In traditional technological applications,the tri-eccentricbutterfly valve is known for its torque sealing, where the valve plate is secured more tightly by the actuator's torque to ensure a firm seal. Nonetheless, in certain challenging scenarios (such as in high-temperature catalytic flue gases, various gases, and sulfur tail gases, where temperatures can skyrocket to 800°C), thermal expansion stress becomes a significant challenge, causing the valve to become immovable and resulting in severe issues such as tri-eccentric butterfly valves getting stuck, thusdisrupting industrial operations, leading to substantial financial losses, and potentially triggering safety hazards.

SNT VALVE is committed to the pioneering research of butterfly valves for high-temperature flue gas systems. To address these concerns, SNT VALVE has innovatively introduced the four-stem eccentric butterfly valve as a superior alternative to the tri-eccentric butterfly valve, therebyeliminating the issues faced and ushering ina new era for butterfly valve solutions in the industry, solving long-standing challenges, and securing two prestigious national patents: a four-stem eccentric butterfly valve (patent No.: ZL201520326489.1, and a catalytic device featuring a four-stem eccentric butterfly valve (patent No.: ZL201921719624.3). Additionally, SNT VALVE has collaborated with the China Petroleum and Chemical Industry Federation to conduct rigorous product identification in association with Changzhou University,which culminated in recognitionas a domestic industry leader.

<sup>Applications of the Innovative Four-link Eccentric Butterfly Valve

The AOC-4000 series of four-link eccentric butterfly valves, ingeniously crafted by SNT, has found its niche as an essential regulating and shut-off valve under special conditions.
Introducing the AOC-4000 series four-link eccentric butterfly valve, the ultimate solution for high-temperature, large-diameter systems where high-flow efficiency and minimal pressure drop are crucial. Engineered for scenarios demanding low leakage and even zero leakage, this valve shines with its remarkable planar sealing performance, effectively preventing valve jamming even under extreme temperatures. Its swift action allows for rapid opening and closing, coupled with high precision in regulation and an unwaveringly reliable seal. Ideal for managing the flow of pipeline media in the intricate production processes of phthalic anhydride and maleic anhydride, this versatile valve also adeptly controls other gases and liquids, such as hydrogen, ammonia, air, smoke, and gas within pipeline systems. To tackle media prone to crystallization, such as sulfur, a jacketed structure can be implemented to avert blockages caused by cooling and condensation, ensuring uninterrupted flow.

The AOC-4000 series four-link eccentric butterfly valve is designed to accommodate flexibility in operation and can be equipped with various actuator types to meet your specific needs. Typically paired with a cylinder-type single-acting actuator, this valve also offers compatibility with cylinder-type double-acting, electric, or hydraulic actuators. This adaptability ensures that the valve meets the demands of diverse applications. Moreover, it boasts an impressive minimum shut-off time ranging from 2 to 6 seconds, allowing for swift and efficient control of fluid dynamics.</sup>




Working Principle

^{The four-link butterfly valve is a sophisticated assembly comprising a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals, each playing a crucial role in its operation. The drive device is the powerhouse behind the valve's functionality, energizing the valve shaft and the innovative four-link mechanism. As the valve shaft rotates, it elegantly opens the valve plate; when aligned parallel to the pipeline center, the valve is in its fully open state, maximizing flow. Conversely, the reverse rotation prompts the closing of the valve plate, achieving complete closure when the plate contacts and compresses against the valve body's sealing surface, ensuring a secure and dependable seal every time.}

Product Specifications

Body

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

 

Design Features

^{• With an impressive maximum diameter of connecting valve bodies reaching up to DN4000, our design stands out in its class.
• Embrace innovation with our distinctive four-stem structure, paired with a pioneering flat seal design for unparalleled reliability.
• The external double bearing design ingeniously prevents mediums from infiltrating and obstructing the bearings.
• Our integrated drain valve deftly shields your system from medium corrosion.
• Crafted for resilience, this high-temperature design withstands temperatures soaring up to 800 ºC
• Engineered with an API607 Fire Protection Design, ensuring safety and reliability.
• Features an integral stem configuration, incorporating an anti-center shaft out design for enhanced security.
• Boasts an anti-static design to safeguard against static electricity.
• With an anti-misoperation design, ensuring precision and control in operation.
• Choose from multiple sealing structures, tailored to meet diverse operational needs.
• Meticulously fabricated construction for robust performance.
• Ingeniously designed for friction-free motion, the disc glides parallel to the body seat during the initial opening and final closing stages.
• Offers a variety of seat arrangements to cater to specific requirements.}
 

Product Range

^{★ Cutting-Edge Design Standard: AP1598, API607, ASME B16.34 - Excellence in Engineering
★ Versatile Standard Sizes: NPS 12-160" (DN300-DN4000) - Broad Spectrum Solutions
★ Robust Pressure Compatibility Class: PN2.5-PN20 / ASME CLASS 150 - Built to Last
★ Wide Applicable Temperature Range: -20 °C ~ 800 °C - Ready for Extremes
★ Leak Prevention Excellence Class: ANSI B16.104 VI, API 598 - Zero Tolerance for Leakage No Leakage - Dependable and Secure
★ Durable Body Material: ASTM A105, A351 CF8M /Special Alloy, etc. - Unyielding Strength
★ Premium Valve Internals Material: A479-316; S2205; 17-4PH - Quality and Reliability
★ Versatile Operation Modes: Manual, Pneumatic, Electric, Electro-Hydraulic, etc. - Adaptable for Every Need
★Product range can be expanded according to user needs - Tailored for You}

Valve Special Treatments

<sup>• Sand Blasting Surface Treatment SA2.5
1. The valve body undergoes thorough sandblasting both inside and outside, ensuring a pristine and smooth base.
2. Experience a refined surface post-sandblasting, offering superior paint adhesion for long-lasting durability.
3. In scenarios where the oxygen content in the medium exceeds 23.5%, only external sandblasting is performed, making internal treatment unnecessary.•</sup>

<sup>• Painting after Surface Treatment
1. Our standard painted surface resists temperatures up to 450°C, with options for tailored treatments for higher temperatures.
2. Two protective coats of 35 micrometers thickness ensure robust corrosion resistance and enhance longevity.

• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The sealing surface of the valve plate can be precision-welded with high-performance materials like Hastelloy and Stellited gr.6.
b) Advanced techniques such as Tungsten carbide and other hard alloy spraying provide remarkable hardness up to HRC60-70.</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Experience efficiency and reliability in sulfur tail gas recovery with our cutting-edge solutions that maximize performance and sustainability.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-: Empower your operations with our innovative solutions tailored for the specific needs of SINOCHEM GROUP's petrochemical incineration boiler crossover projects.stem: Our systems are engineered for precision and durability, ensuring optimal operation and minimal downtime. Butterfly Valve (: Built to withstand rigorous demands, our butterfly valves offer unparalleled control and reliability in diverse industrial applications.T: Trust in our technology to deliver exceptional performance and efficiency for your critical operations.The right: Choose the right solution with our expertly designed products that meet the highest standards of quality and performance. figure: Each figure represents the pinnacle of engineering excellence, crafted to deliver superior functionality. is: Experience the pinnacle of innovation with our state-of-the-art offerings, designed to transform your operations. used product after: Our products continue to perform exceptionally, even after extensive use, proving their durability and dependability. 4 years): For over four years, our products have consistently delivered outstanding performance, underscoring our commitment to quality.

Petro China 270,000 tons/year sulfur tail gas standard project: Our solutions support Petro China's large-scale sulfur tail gas projects, driving efficiency and environmental compliance.

catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Opt for superior efficiency with our catalytic flue gas turbine outlet butterfly valve, a reliable alternative to traditional water seal tanks.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Analyze the benefits of our advanced solutions in SINOPEC's catalytic flue gas turbine applications, enhancing heat recovery and operational efficiency.

Images from the scene: Captivating images from the field highlight the exceptional performance and integration of our products in real-world applications. of: A vital component of strategic industrial operations, our products are designed to deliver exceptional results. SINOCHEM GROUP: Partner with SINOCHEM GROUP to leverage the power and reliability of our specialized machinery. Refining and Chemical: Our products seamlessly integrate into refining and chemical processes, enhancing productivity and operational excellence. catalytic flue gas turbine outlet: Benefit from our cutting-edge solutions for catalytic flue gas turbine outlets, engineered for superior performance. to chimney: Our products ensure efficient and reliable flow from turbine outlets to chimneys, optimizing your process efficiency.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery(Qingdao) Co., Ltd stands as a beacon of innovation in the sphere of control valves, harmoniously integrating manufacturing, design, sales, and services under one prestigious banner. With an auspicious beginning and rapid progression, SNT is strategically situated in the dynamic landscape of Qingdao, Shandong province, sprawling over an impressive area of 42,000 m2. This state-of-the-art facility is adorned with modern workshops and cutting-edge production equipment. Proudly recognized as a high-tech enterprise, SNT boasts independent intellectual property rights, enriched by imported, avant-garde management and production expertise. Supported by a talented workforce exceeding 150, with 15% dedicated to R&D and 30% holding graduate or higher degrees, SNT thrives on a robust production management team and pioneering technology R&D. This enables SNT to deliver vast quantities of superior valves, indispensable to the petrochemical, oil, and coal chemical sectors. In 2017, our sales value soared to nearly 100 billion.

SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside the esteemed net qualification certificates from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further validated by numerous National Patents. We are adept at designing and crafting an extensive range of valves in strict accordance with ANSI, API, DIN, BS, JIS standards. By amalgamating the finest attributes of globally renowned valves and fostering our own research and development, we excel in producing diverse valve types, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, 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 driving forms encompass manual, power-driven, pneumatic, and hydraulic options. Main materials feature A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", supporting working pressures from ANSI 150# to 2500#, and accommodating temperatures from -196ºC to 1100ºC.

Harnessing advanced production technology, astute management, and a rigorous quality assurance system, SNT Valves have found widespread application across pivotal industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features industry giants such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Changling branch, Jinan branch, and many more, reinforcing our reputation as a trusted partner.

At SNT, we prioritize our users' success, committing ourselves to unparalleled quality and brand excellence. Our sophisticated quality assurance and after-sales systems ensure that SNT valves foster prosperity in collaboration with our valued customers, creating a legacy of mutual growth and success.</sup>