Four Lever Offset Shutoff Butterfly Valves, ASME B16.34 Design Standard

• 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 industrial landscape experiences a transformation, and the global demand for energy efficiency and environmental protection policies escalate,the utilization of cut-off butterfly valves has surged remarkably. Previously, technological advancementsin this arena have beendirected towards enhancing torque sealing, where the tri-eccentric butterfly valve employs actuator torque to ensure a robust seal. However, under extreme conditions, such as exposure to high-temperature catalytic flue gases, gases, and sulfurous tail emissions with temperatures soaring to 800°C, thermal expansion stress can render the valve inoperable, risking catastrophic outcomes like tri-eccentric valve jamming, which severely impactsindustrial processes,resulting in substantial economic setbacks,and potentially leading to hazardous accidents. SNT


VALVE is dedicated to pioneering innovative research in high-temperature flue gas butterfly valves.Addressing these challenges, SNT VALVE has devised an unprecedented solution by introducing a four- stemeccentric butterfly valve, replacing the traditional tri- stemeccentric design and collaborating withthe advancedbutterfly valve technology, redefining industry standards as a pioneering move. This breakthrough has resolved enduring issues and earned two prestigious national patents: the four- stemeccentric butterfly valve (patent No. :ZL201520326489.1) and the catalytic device with four- stemeccentric butterfly valve (patent No. : ZL201921719624.3). In collaboration with the China Petroleum and Chemical Industry Federation,commissioned Changzhou University to conduct a rigorous product evaluation, resulting in our technology being recognizedas a domestic benchmark, a pioneering achievementin valve engineering.

<sup>Four-link Eccentric Butterfly Valve Application: Unleashing New Potentials

The AOC-4000 series, skillfully crafted by SNT, demonstrates exceptional performance as a specialized regulatory and shut-off valve for challenging conditions.
Introducing the AOC-4000 series, a pinnacle of engineering in the world of four-link eccentric butterfly valves. This remarkable valve is engineered for scenarios demanding precision and resilience, such as high-temperature, large-diameter, and high-flow applications with minimal pressure drops. It's your go-to solution for achieving zero leakage and exceptional sealing performance, even under extreme temperatures where traditional valves might fail. The AOC-4000 ensures swift opening and closing capabilities, with high adjustment accuracy and sealing reliability. It shines in production processes involving phthalic anhydride and maleic anhydride, and is equally adept at managing other gases and liquids, including hydrogen, ammonia, air, smoke, and pipeline gases. For media like sulfur that tend to crystallize, it boasts an ingenious jacketed structure to maintain seamless flow, preventing blockages from cooling and condensation. Truly, the AOC-4000 is the epitome of versatility and reliability in butterfly valves.

The AOC-4000 series is designed with flexibility and adaptability at its core, typically featuring a robust cylinder-type single-acting actuator. However, it doesn't stop there. Depending on your specific requirements, you can opt for cylinder-type double-acting actuators, electric actuators, or even hydraulic actuators, ensuring complete compatibility with your system. Remarkably, this valve's shut-off time is as swift as (2-6) seconds, providing you with efficiency and control unparalleled in its class.</sup>




Working Principle

^{The AOC-4000's design is a masterclass in engineering, comprising essential components like the drive device, valve plate, valve body, valve shaft, linkage system, and shaft end seals. The operational elegance lies in its drive mechanism, which activates the valve shaft and powerfully manipulates the four-link system. As the valve shaft turns, it flawlessly opens the valve plate, achieving full openness when parallel to the pipeline center. A reverse rotation ensures a precise, full closure, as the valve plate engages and compresses against the sealing surface of the valve body, establishing an impeccable seal. This intricate dance of components guarantees the utmost in operational efficiency and reliability, making it an indispensable element in any high-performance pipeline system.}

Product Specifications

Body: Precision-engineered for durability, the body of our butterfly valves is crafted to withstand the most demanding conditions, ensuring longevity and optimal functionality.

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, the connecting valve body is engineered to accommodate sizes up to DN4000, ensuring versatility and adaptability across a broad spectrum of applications.
• Revolutionary four-stem structure design, paired with a meticulous flat seal design, elevates performance and reliability, setting new standards in engineering excellence.
• The ingenious external double bearing design effectively prevents any medium intrusion, safeguarding the bearings from blockage and ensuring seamless operation.
• A highly efficient drain valve stands guard against medium corrosion, prolonging the lifespan and integrity of the system.
• The robust high temperature design can withstand soaring temperatures up to an impressive 800 ºC
• Engineered with API607 Fire Protection Design, offering an enhanced safety profile that you can trust in critical applications.
• Innovatively crafted with an integral stem design and anti-center shaft out feature, ensuring peak performance and safety.
• Thoughtfully integrated anti-static design safeguards against static electricity, providing a secure and reliable operation.
• With an anti-misoperation design, this product prioritizes user safety and operational precision.
• Offering a plethora of multiple sealing structures for option, catering to diverse operational needs and preferences.
• Employing a fabricated construction, this design promises durability and resilience against demanding conditions.
• At both the initial stage of opening and the final stage of closing, the disc moves parallel to the body seat, providing a friction-free motion that enhances longevity and operational efficiency.
• Featuring various seat arrangements, this design offers flexibility and adaptability to meet diverse application requirements.}
 

Product Range

^{★ Design standard: AP1598, API607, ASME B16.34 - crafted to meet the highest industry benchmarks
★ Standard size: NPS12-160" (DN300-DN4000) - Tailored for diverse operational demands
★ Pressure class: PN2.5-PN20/ASME CLASS 150 - Built to endure varying pressure conditions
★ Applicable temperature: -20 °C ~ 800 °C - Designed for extreme temperature resilience
★ Leakage class: ANSI B16.104 VI, API598 - Precision-engineered for no leakage no leakage
★ Body material: ASTM A105, A351 CF8M/special alloy, etc. - Using premium materials for reliability
★ Valve internals material: A479-316; S2205; 17-4PH - Engineered for durability and strength
★ Operation mode: manual, pneumatic, electric, electro-hydraulic, etc. - Versatile operation modes to suit all needs
★Product range can be expanded according to user needs - Offering customization for specific requirements.}

Valve Special Treatments

<sup>• Sand Blasting Surface Treatment SA2.5
1. The valve body undergoes comprehensive sandblasting, both inside and out, ensuring a pristine finish.
2. The fine surface texture post-sandblasting guarantees superior paint adhesion, enhancing durability.
3. If the oxygen content in the medium exceeds 23.5%, external sandblasting is applied, while internal sandblasting becomes unnecessary.•</sup>

<sup>• Painting after Surface Treatment
1. The standard painted surface withstands temperatures up to 450°C. For even higher temperatures, customized treatments are 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 may be welded with premium materials like Hastelloy or Stellited gr.6, ensuring maximum resilience.
b) Hard alloy spraying, including Tungsten carbide, achieves hardness levels up to HRC60-70, ensuring longevity and performance.</sup>
 

Typical Product Application

Advanced Sulfur Tail Gas Recovery Solutions

SINOCHEM GROUP's Petrochemical Incineration Boiler Crossover Utilizinga Four-Lever Stem Sophisticated Butterfly Valve (The depicted illustration represents a product deployed after 4 years of rigorous operation)

Petro China's state-of-the-art 270,000 tons/year sulfur tail gas benchmark project

where the catalytic flue gas turbine outlet butterfly valve substitutes the traditional water seal tank

A Comparative Analysis of SINOPEC's catalytic flue gas turbine outlet transitioning to a heat recovery boiler site

Visual Imagery Captured from the Scene at SINOCHEM GROUP's Refining and Chemical Division involving the catalytic flue gas turbine outlet leading to the chimney

 

Production application

 

 

 

 

 

Company Profile

<sup>SNT Machinery (Qingdao) Co., Ltd seamlessly integrates the production, design, sales, and service of control valves, establishing itself as a pioneer in the industry. Located in the picturesque city of Qingdao, Shandong province, our state-of-the-art facility spans an impressive 42,000 square meters, boasting cutting-edge workshops and advanced production equipment. Recognized as a high-tech enterprise with proprietary intellectual property rights, SNT Machinery leverages world-class management and production expertise. Our dedicated team comprises over 150 professionals, including a vibrant R&D department representing 15% and a highly educated workforce with 30% holding graduate degrees or higher. Our commitment to excellence in production management and innovative technology enables us to deliver a vast range of premium-quality valves, instrumental in the petrochemical, oil, and coal chemical sectors. In 2017, we achieved a remarkable sales value nearing 100 billion, underlining our prominence in the industry.

SNT proudly holds the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification, complementing our net qualification from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further recognized through numerous national patents. We skillfully design and manufacture a comprehensive array of valves, adhering to global standards such as ANSI, API, DIN, BS, and JIS. By amalgamating the strengths of renowned international valves with our proprietary R&D, we offer an extensive selection 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 valves are available in manual, power-driven, pneumatic, and hydraulic operations. The main parts are crafted from premium materials like A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120" and operational capacities of ANSI 150#~2500#, suitable for temperatures from -196ºC to 1100ºC.

Benefiting from cutting-edge production technology management and a robust quality assurance system, SNT Valves are trusted in critical industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Esteemed clients such as SINOPEC QILU, SINOPEC Qingdao, CNOOC Huizhou Refinery, PETROCHINA Guangxi, PETROCHINA Ningxia, SINOPEC Qingdao Refinery, and many more, form a testament to our reliability and excellence across diverse sectors.

Placing customer profit at the heart of our mission, SNT is devoted to building outstanding quality and reputable brand recognition. Our impeccable quality assurance and comprehensive after-sales systems ensure a collaborative relationship with all our clients, fostering shared success and mutual growth.</sup>