Advanced Four Lever Offset Shutoff Butterfly Valves, Nps 12-160" Specifications

• 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, 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.

<sup>Four-link Eccentric Butterfly Valve Application

The 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 four-link eccentric butterfly valve, the epitome of precision and reliability in valve technology. Perfectly engineered for handling high-temperature, large-diameter, and high-flow applications, this valve excels in scenarios demanding minimal pressure drops and absolute leakage control, ensuring both low-leakage and zero-leakage functionalities. Its exceptional planar sealing performance guarantees smooth operation even at elevated temperatures, effectively eliminating the risk of valve jamming. The valve's rapid opening and closing capabilities, coupled with its remarkable adjustment precision and dependable sealing, make it indispensable for managing pipeline media in the production of phthalic anhydride and maleic anhydride. Additionally, its versatile design allows for adept control over various gases and liquids, including hydrogen, ammonia, air, smoke, and gas. For media susceptible to crystallization, such as sulfur, the valve can be equipped with a jacketed structure to avert pipeline blockages caused by cooling and condensation.

The AOC-4000 series four-link eccentric butterfly valve is most commonly outfitted with a cylinder-type single-acting actuator, ensuring efficient and responsive control. However, for more tailored performance, options include cylinder-type double-acting actuators, as well as electric and hydraulic actuators, catering to diverse operational requirements. Notably, this advanced valve design achieves a minimum shut-off time ranging from an impressive 2 to 6 seconds, providing swift and reliable shut-off in critical situations.</sup>




Working Principle

^{The sophisticated four-link butterfly valve is composed of several key components: a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The valve's operational brilliance lies in the drive device, which propels the valve shaft and the intricate four-link mechanism. As the valve shaft rotates, it elegantly swings the valve plate open, aligning it parallel to the pipeline center for a fully open position. Conversely, reversing the rotation seamlessly closes the valve plate, with precise contact and compression against the valve body's sealing surface, achieving a fully sealed state. This meticulous process underscores the valve's exceptional reliability and efficiency.}

Product Specifications

Body: The core component of our Advanced Four Lever Offset Shutoff Butterfly Valves. Meticulously crafted for unparalleled durability and precision, the body is engineered to withstand the most demanding operational environments, ensuring reliable performance and longevity.

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

^{• Experience superior connectivity with a maximum valve body diameter reaching up to DN4000, ensuring robust performance across demanding applications.
• Embrace innovation with our unique four-stem structure design and flat seal configuration, delivering exceptional sealing efficiency and reliability.
• Our meticulously crafted external double bearing design effectively prevents the intrusion of medium, safeguarding bearings from blockage and enhancing longevity.
• Incorporated drain valve ensures protection against medium corrosion, maintaining optimal operation and durability.
• Engineered for resilience, our high temperature design withstands up to a remarkable 800 ºC
• Conforming to API607 standards, our fire protection design offers unparalleled safety and assurance.
• Our integral stem design features an anti-center shaft out mechanism, ensuring structural integrity and operational security.
• Benefit from our anti-static design, crafted to eliminate static electricity risks during operation.
• Equipped with an anti-misoperation design, our valves provide enhanced safety against unintentional operation.
• Choose from multiple sealing structures tailored to meet diverse industrial requirements, offering flexibility and precision.
• Our precision-engineered fabricated construction ensures durability and consistent performance.
• At both initial opening and final closing stages, the disc's parallel motion against the body seat ensures a friction-free operation, enhancing efficiency and lifespan.
• Explore various seat arrangements tailored to your specific needs, ensuring optimal fit and functionality.}
 

Product Range

^{★ Design standard: AP1598, API607, ASME B16.34
★ Standard size: NPS 12-160" (DN 300-DN 4000)
★ Pressure class: PN 2.5-PN 20/ASME CLASS 150
★ Applicable temperature range: -20 °C to 800 °C
★ Leakage class: ANSI B16.104 VI, API 598 no leakage
★ Body material: ASTM A105, A351 CF8M,and special alloys, etc.
★ Valve internals material: A479-316, S2205, 17-4PH
★ Operation modes: manual, pneumatic, electric, electro-hydraulic, etc.
★Product range can be customized to meet user requirements}

Valve Special Treatments

<sup>• Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting both inside and outside of the valve body ensures unparalleled cleanliness and preparation.
2. Achieve a refined surface finish post-sandblasting with exceptional paint adhesion, enhancing durability.
3. For media with an O2 content exceeding 23.5%, opt for external sandblasting, eliminating the need for internal treatment.•</sup>

<sup>• Painting after Surface Treatment
1. The standard painted surface endures temperatures up to 450°C, with options for higher temperature treatments available.
2. Dual coats of paint, each 35 micrometers thick, provide robust corrosion protection, extending valve life.

• Hard Alloy Surfacing on Sealing Surface of Valve Plate
a) The valve plate's sealing surface can be expertly welded with materials such as Hastelloy and Stellited gr.6 for high performance.
b) For maximum hardness, advanced tungsten carbide and other hard alloy spraying techniques achieve a remarkable HRC60-70.</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Harness the potential of sulfur tail gas with our specialized solutions designed to maximize recovery and efficiency.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-stem: A robust and reliable system crafted to ensure seamless integration and exceptional performance in petrochemical environments. Butterfly Valve (The right figure is used product after 4 years): Experience the enduring quality and lasting performance of our butterfly valves, even after years of rigorous use.

Petro China 270,000 tons/year sulfur tail gas standard project: Our valves are integral in handling substantial capacities, ensuring efficient processing and compliance with stringent standards.

catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Opt for superior technology with our butterfly valves, which provide reliability and improved functionality over traditional water seal tanks.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Discover the advantages of our solutions that enhance performance and energy efficiency in heat recovery applications.

Images from the scene of SINOCHEM GROUP Refining and Chemical: Witness our contributions to the refining and chemical industry, where precision and durability are paramount. catalytic flue gas turbine outlet to chimney: Our valves serve as key components in the flow from catalytic flue gas turbines to chimneys, ensuring optimal performance and environmental compliance.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of innovation and excellence as a distinguished producer of control valves. Seamlessly integrating state-of-the-art manufacturing, strategic design, comprehensive sales, and exceptional service, SNT has swiftly advanced from a strong foundation. Nestled in the dynamic hub of Qingdao, Shandong province, our expansive 42,000m2 facility is a testament to our commitment to cutting-edge production and modern manufacturing excellence. As a high-tech enterprise, we pride ourselves on owning independent intellectual property rights and leveraging advanced international management prowess. With a dedicated workforce exceeding 150 personnel, including 15% R&D specialists and 30% graduates with advanced degrees, we are at the pinnacle of innovation and quality. Our robust production management, bolstered by a visionary R&D team, empowers us to craft high-quality valves extensively used in petrochemical, oil, and coal chemical industries. Our growth trajectory saw us achieving a remarkable sales value nearing 100 billion in 2017.

SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation, underscoring our commitment to quality and safety. We've earned prestigious net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside numerous national patents in innovative technologies. Our capability extends to designing and manufacturing an extensive array of valves, conforming to ANSI, API, DIN, BS, and JIS standards. Our expertise amalgamates the strengths of renowned global valves with our pioneering research and development. Our portfolio includes 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 driving methods span manual, electric, pneumatic, and hydraulic options. We employ premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M in specifications ranging from 1/2" to 120", supporting pressures from ANSI 150# to 2500#, and temperatures between -196ºC and 1100ºC.

Embracing advanced production technology management and a robust quality assurance system, SNT Valves are the trusted choice across petrochemical, oil, steel & iron, paper manufacturing, and power station sectors. Our esteemed clientele includes industry leaders such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others. Our unwavering dedication to excellence ensures that our valves not only meet but consistently exceed the industry's rigorous demands.

At SNT, we prioritize our users' profits, dedicating ourselves to establishing unparalleled quality and a renowned brand. Our flawless quality assurance and exceptional after-sales systems form the cornerstone of our commitment to join hands with all our customers, forging a path to mutual prosperity and success.</sup>