Eletrci High-Performance Four Lever Offset Shutoff Butterfly Valves for Various Applications 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, 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, a pinnacle in four-link eccentric butterfly valves, engineered meticulously for high-temperature environments, handling large diameters, and ensuring robust flow with minimal pressure drop and leakage. Its superior planar sealing performance ensures seamless operations without jamming, even under extreme temperatures. This valve's swift opening and closing capabilities, coupled with precise adjustment accuracy and steadfast sealing, make it the ideal choice for managing and regulating pipeline media like phthalic anhydride and maleic anhydride in production processes. It also excels in controlling a variety of gases and liquids such as hydrogen, ammonia, air, smoke, and other gases within pipeline systems. For media that tends to crystallize, like sulfur, an innovative jacketed structure is available to avert blockages from cooling and condensation, ensuring smooth flow.

The AOC-4000 series is typically paired with a state-of-the-art cylinder-type single-acting actuator, offering flexibility to opt for cylinder-type double-acting actuators, electric actuators, or hydraulic actuators to suit specific operational needs. Impressively, this valve can achieve a minimum shut-off time ranging from a mere 2 to 6 seconds.</sup>




Working Principle

^{At the core of the four-link butterfly valve's operation is a synergy of components: a drive device, a valve plate, a valve body, a valve shaft, a linkage system, and shaft end seals. Activation of the valve's opening and closing action is powered by the drive device, which engages the valve shaft and the sophisticated four-link mechanism. As the valve shaft rotates, it moves the valve plate to align parallel with the pipeline center, indicating a fully open position. Conversely, a reverse rotation closes the valve plate, and the valve achieves full closure when the plate contacts and compresses the sealing surface of the valve body, guaranteeing a secure seal.}

 

Product Specifications

Body: The robust design of the body ensures unparalleled durability and resilience, constructed from top-grade materials that promise long-lasting performance and exceptional resistance to wear and corrosion.

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

^{• Boasting an impressive maximum diameter for connecting valve bodies of up to DN4000, these valves are built for the most demanding environments.
• Featuring a distinctive four-stem structure design, coupled with a flat seal design, ensuring optimal performance and reliability.
• The innovative external double bearing design effectively prevents any medium intrusion, eliminating blockage issues and enhancing operational efficiency.
• Equipped with a drain valve that safeguards against medium corrosion, ensuring longevity and durability.
• Engineered to withstand high temperatures up to an extraordinary 800 ºC, making it ideal for extreme conditions.
• Incorporates API607 Fire Protection Design for unparalleled safety and security.
• Presents an integral stem design with an anti-center shaft out feature, enhancing stability and control.
• Includes an anti-static design to prevent static charge build-up, ensuring safe and reliable operation.
• Designed with an anti-misoperation mechanism to avoid accidental activation and ensure user safety.
• Offers multiple sealing structures as options, catering to diverse needs and applications.
• Features a robust fabricated construction, guaranteeing strength and resilience under pressure.
• In the initial stages of opening and the final stages of closing, the disc moves parallel to the body seat, providing a friction-free motion that enhances efficiency and reduces wear.
• Comes with various seat arrangements to cater to different operational requirements and preferences.}
 

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: -20 °C ~ 800 °C
★ Leakage class: ANSI B16.104 VI, API 598 No leakage
★ Body material: ASTM A105, A351 CF8M /special alloy, etc.
★ Valve internals material: A479-316; S2205; 17-4 PH
★ Operation mode: Manual, Pneumatic, Electric, Electro-hydraulic, etc.
★Product range can be expanded according to user needs}

Valve Special Treatments

<sup>• Advanced Sand Blasting Surface Treatment SA2.5
1. Comprehensive sandblasting of valve body, inside and out, ensures a pristine surface.
2. Achieve a fine, even surface post-sandblasting, enhancing paint adhesion remarkably.
3. In scenarios where the oxygen content in the medium exceeds 23.5%, only external sandblasting is necessary, eliminating the need for internal treatment.•</sup>

<sup>• Painting Excellence after Meticulous Surface Treatment
1. Our standard painted surfaces withstand temperatures up to 450°C effortlessly. For even higher temperatures, specialized treatments are available.
2. Apply two robust coats of paint, each 35 micrometers thick, ensuring superior corrosion resistance.

• High-Precision Hard Alloy Surfacingon the Sealing Surface of the Valve Plate
a) Transform the sealing surface of the valve plate with welded materials like Hastelloy and Stellited gr.6 for unmatched durability.
b) Employ tungsten carbide or other hard alloy spraying techniques, achieving an extraordinary hardness level of HRC60-70.</sup>
 

Typical Product Application

Sulfur Tail Gas Recovery: Elevate your processes with our advanced butterfly valves, specifically designed to excel in demanding sulfur tail gas recovery operations. Experience enhanced efficiency and uncompromising quality.

SINOCHEM GROUP Petrochemical Incineration Boiler Crossover Four-: Witness the power of precision with our state-of-the-art valves, expertly integrated into Sinochem Group's sophisticated petrochemical incineration systems.stem: Our cutting-edge design ensures seamless performance and adaptability, catering to complex operational requirements with ease. Butterfly Valve (: Discover the epitome of innovation with our butterfly valves, engineered to redefine the standards of performance and durability.T: The hallmark of excellence, our valves embody technological advancements that elevate your industrial applications to new heights.he right: Our meticulously crafted solutions are always the right choice for enhancing operational efficiency and safeguarding your systems. figure: The figure exemplifies the remarkable engineering and robust construction of our butterfly valves, setting a benchmark for excellence. is: Our product is synonymous with reliability and superior performance, even in the most challenging environments. used product after: Experience the lasting impact of our valves, engineered to maintain their optimal performance even after years of use. 4 years): Our valves stand the test of time, delivering consistent and reliable performance well beyond four years of rigorous application.

Petro China 270,000 tons/year sulfur tail gas standard project: Our valves play a pivotal role in Petro China's ambitious sulfur tail gas project, designed to handle 270,000 tons annually with unmatched precision and efficiency.

catalytic flue gas turbine outlet butterfly valve instead of water seal tank: Transform your operations by replacing traditional water seal tanks with our innovative butterfly valves at the catalytic flue gas turbine outlet, paving the way for enhanced efficiency.

Comparison of SINOPEC catalytic flue gas turbine outlet to heat recovery boiler site: Our valves redefine industry standards, showcasing unparalleled performance in the catalytic flue gas turbine outlet to heat recovery boiler comparison.

Images from the scene: Visualize the remarkable integration and functionality of our high-performance valves through vivid images captured from operational sites. of: A testament to the impeccable craftsmanship and superior performance that our valves consistently deliver. SINOCHEM GROUP: Partner with industry leaders like Sinochem Group and leverage our world-class valve solutions for unmatched operational success. Refining and Chemical: Our valves are expertly crafted to meet the rigorous demands of refining and chemical applications, ensuring optimal performance and reliability. catalytic flue gas turbine outlet: Our solutions are integral to optimizing the catalytic flue gas turbine outlet, delivering efficiency and reliability at every turn. to chimney: From turbine outlet to chimney, our butterfly valves facilitate seamless transitions, ensuring a streamlined and efficient process flow.

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd, a powerhouse in control valve production, elegantly marries manufacturing, design, sales, and exceptional service under one roof. With a strategic location in Qingdao, Shandong province, sprawling over 42,000 square meters, our state-of-the-art facilities and cutting-edge production equipment set the stage for innovation and excellence. As a high-tech enterprise, we pride ourselves on owning independent intellectual property rights and integrating advanced management and production practices from around the globe. Our dynamic team of over 150 skilled workers includes 15% dedicated R&D specialists and 30% graduates with advanced degrees, driving our leap from modest beginnings to rapid advancement. Our relentless pursuit of quality and innovation enables us to produce a vast array of superior valves, essential to the petrochemical, oil, and coal chemical industries. By 2017, our sales soared to an impressive near 100 billion, a testament to our commitment to excellence.

SNT is not just a manufacturer; we are certified leaders in the valve industry. We proudly hold the TS special equipment manufacturing certificate and ISO 9001 certification, in addition to the network qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio of national patents showcases our technological prowess. We specialize in designing and producing a comprehensive range of valves conforming to ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of globally renowned valves and infusing our own research-driven innovations, we offer a wide spectrum of valves, including GLOBE, High Pressure Boiler Blow-down Valves, and High-performance Butterfly Valves, amongst others. Our versatile driving forms span manual, power-driven, pneumatic, and hydraulic options, crafted from premium materials like A216WCB and A217 WC6/WC9. With specifications ranging from 1/2" to 120", pressures of ANSI 150#~2500#, and temperatures from -196ºC to 1100ºC, our valves are engineered for precision and durability.

Built on a foundation of cutting-edge production technology and a robust quality assurance system, SNT Valves have become indispensable in the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and more illustrious names. This vast network of partnerships underscores our reputation as a trusted supplier, continuously delivering excellence and reliability.

At SNT Machinery, customer success fuels our passion. By prioritizing user profits and committing to exemplary quality and brand prestige, we stand united with our customers. Our impeccable quality assurance and exemplary after-sales service systems ensure that with SNT valves, prosperity is a shared journey. Join us as we craft a future of innovation and growth together.</sup>