electric Four Lever Offset Shutoff Butterfly Valves, Nps 12-160" for Heavy Applications From China Manufacturer

• 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 remarkable advancements in industry and technology, alongside the increasing demands for energy conservation and environmental protection, policy,the use of cut-off butterfly valves has expanded significantly. In traditional technology,the tri-eccentric butterfly valve relies on torque sealing. The valve plate is secured more firmly by the actuator's torque to achieve an effective seal. However, in critical settings(such as high temperature catalytic flue gas, gas, sulfur tail gas, and other intense media where temperatures can soar to 800°C), thermal expansion stress may render the valve immovable, leading to catastrophic outcomes such as the tri-eccentric butterfly valve becoming jammed,causing significant interruptions in industrial production, resulting in enormous economic losses, and potentially leading to dire safety incidents.SNT VALVE is a trailblazer intheresearch and development of high-performance butterfly valves for high-temperature flue gas applications.To address these challenges, SNT VALVE has revolutionized the industry by introducing the four-stem eccentric butterfly valve, a pioneering solution. This innovative design, replacing the traditional tri-eccentric models, has effectively resolved longstanding issues and has been recognized with two 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).

SNT VALVE, in collaboration with the China Petroleum and Chemical Industry Federation, commissioned a comprehensive product assessment with Changzhou University, which culminated in the prestigious accolade of being recognized as the domestic leader.Application of the Four-link Eccentric Butterfly Valve: The AOC-4000 series four-link eccentric butterfly valve, expertly crafted by SNT, serves as a superior solution for regulating and shut-off in challenging conditions. Its widespread use underscores SNT's pioneering role in advancing valve technology.

<sup>Presenting the AOC-4000 series four-link eccentric butterfly valve, an engineering marvel perfect for scenarios demanding high-temperature endurance, large-diameter capacity, high-flow efficiency, and minimal pressure drop. This valve is your answer to achieving low to zero leakage, thanks to its outstanding planar sealing performance that adeptly prevents jamming even under soaring temperatures. Experience swift opening and closing accompanied by precise adjustment, ensuring unfailing sealing. This makes it the ideal choice for regulating or halting the flow of pipeline media during the intricate production processes of phthalic anhydride and maleic anhydride. Furthermore, it's adept at controlling a variety of gases and liquids including hydrogen, ammonia, air, smoke, and other gases in diverse pipeline systems. For media susceptible to crystallization, such as sulfur, the optional jacketed design expertly averts pipeline blockage due to cooling and condensation, maintaining smooth and uninterrupted flow.

The AOC-4000 series comes typically outfitted with a cylinder-type single-acting actuator, delivering dependable performance. However, customization options are available, allowing you to opt for cylinder-type double-acting actuators, electric actuators, or robust hydraulic actuators tailored to specific needs. Experience rapid responsiveness with the valve's minimum shut-off time ranging remarkably between 2 to 6 seconds, ensuring prompt action when it matters most.</sup>




Working Principle

^{The four-link butterfly valve showcases a sophisticated composition including a drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The operation hinges on the drive device that initiates the valve's opening and closing processes. The drive maneuvers the valve shaft and the four-link mechanism with precision. When the valve shaft rotates, it unfurls the valve plate, aligning it with the pipeline center to achieve a fully open state. Conversely, the reverse rotation smoothly seals the valve by pressing the valve plate against the body's sealing surface, ensuring a full closure and optimal sealing integrity.}

Product Specifications

Body: Constructed with precision and durability in mind, our valve bodies offer unparalleled strength and resilience, ensuring reliability even under the most demanding conditions.

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 capacity, the connecting valve body can reach up to DN4000, ensuring robust and adaptable performance for various heavy-duty applications.
• Ingenious and unique four-stem structure design, complemented by an innovative flat seal design, guarantees exceptional reliability and efficiency in operations.
• Ingeniously crafted with an external double bearing design that effectively prevents the entry of medium into the bearing, thereby eliminating any potential for blockages.
• Strategically placed drain valve ensures effective prevention against medium corrosion, enhancing longevity and durability.
• Advanced high-temperature resilience with a design accommodating up to 800 ºC, ideal for extreme conditions.
• Complies with API607 Fire Protection Design for superior safety assurance.
• Integrally designed stem incorporating an anti-center shaft out feature for enhanced stability.
• Equipped with an anti-static design ensuring safe and reliable operation.
• Includes an anti-misoperation design to minimize errors and increase operational precision.
• Offers multiple sealing structure options to tailor performance based on specific needs.
• Constructed using a fabricated construction method for superior strength and stability.
• 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 seamless operation.
• Features various seat arrangements, offering flexibility and adaptability to meet a wide range of application requirements.}
 

Product Range

^{★ Design Standard: AP 1598, API 607, 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 to 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.
★Our product range is adaptable and can be expanded according to user needs to ensure a perfect fit for any application.}

Valve Special Treatments

<sup>• Advanced Sand Blasting Surface Treatment SA2.5
1. Thorough sandblasting applied both inside and outside the robust valve body.
2. Achieves a fine, smooth surface post-sandblasting, ensuring exceptional paint adhesion.
3. When oxygen content in mediumexceeds 23.5%, external sandblasting is conducted, making internal sandblasting unnecessary. >23.5%, external sandblasting, internal sandblasting is not required•</sup>

<sup>• Impeccable Painting after Comprehensive Surface Treatment
1. Surfaces with standard paint endure up to 450°C; higher temperatures are addressed with specialized treatments.
2. Dual-layer paint, each 35 micrometers, provides formidable protection against corrosion.

• Innovative Hard Alloy Surfacingon the Sealing Surface of the Valve Platea) Seal surfaces can be enhanced with Hastelloy or Stellited gr.6 welding.
b) Employing tungsten carbide and other hard alloy spraying, results in hardness ranging from HRC60-70.
b) Tungsten carbide and other hard alloy spraying, hardness up to HRC60-70</sup>
 

Typical Product Application

Designed for Efficient Sulfur Tail Gas Recovery

SINOCHEM GROUP's Petrochemical Incineration Boiler Crossover with Four-Lever Stem Mechanism Advanced Butterfly Valve (The accompanying illustration depicts the extensive use of our product after a remarkable 4 years in operation)

Pioneering the Petro China Project: Achieving 270,000 tons/year Sulfur Tail Gas Standards

Utilizing catalytic flue gas turbine outlet butterfly valves to replace traditional water seal tanks

Assessing the SINOPEC catalytic flue gas turbine outlet transition to heat recovery boiler at site

Captivating Images from the Scene of the reputable SINOCHEM GROUP in the Refining and Chemical Sector showcasing catalytic flue gas turbine outlet pathways directing to the chimney

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd. is a distinguished manufacturer of premium control valves. Seamlessly integrating design, production, sales, and service, SNT Machinery stands as a beacon of rapid advancement and innovation. Nestled in the vibrant city of Qingdao, Shandong Province, our enterprise spans an impressive 42,000 square meters, featuring state-of-the-art workshops and cutting-edge production facilities. As a high-tech enterprise with unique intellectual property rights, we leverage imported advanced management and production expertise. Our team boasts over 150 dedicated employees, with 15% specializing in research and development and 30% holding graduate or advanced degrees. Driven by exceptional production management and pioneering technological research, we consistently deliver high-caliber valves for the petrochemical, oil, and coal chemical industries. In 2017 alone, our sales soared to nearly 100 billion.

SNT Machinery proudly holds the TS special equipment manufacturing certificate and ISO 9001 certification, alongside the network qualification certifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Additionally, we have secured numerous national patents in various technologies. Our expertise extends to designing and manufacturing an extensive array of valves conforming to ANSI, API, DIN, BS, and JIS standards. By synthesizing the strengths of renowned global valve technologies and fostering independent research and development, we excel in producing an array of valves, 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, and cryogenic valves. Our drive mechanisms encompass manual, power-driven, pneumatic, and hydraulic operations. Core materials include A216 WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operating temperatures from -196ºC to 1100ºC.

Employing advanced production technologies and a robust quality assurance system, SNT Valves have gained widespread acclaim across petrochemical, oil, steel and iron, paper manufacturing, and power station industries. Our esteemed clientele comprises SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, PETROCHINA Ningxia Branch, among others. Our partnerships with these industry giants underscore our commitment to reliability and excellence.

At SNT Machinery, we prioritize our customers' success, committed to crafting exceptional quality and a respected brand. Our comprehensive quality assurance and after-sales support ensure that SNT valves stand united with our clients, forging a path to shared prosperity and success.</sup>