- Overview
- Product Parameters
- Product Description
- Structure Features
- Our Advantages
- Production application
- Company Profile
Basic Info.
Product Description
Body type | AOC-3843 | AOC3844 |
Body size | 1/2''(40A)-6''(600A) | 1/2''(40A)-24''(600A) |
Body rating | ANSI 150-2500 | ANSI150-2500 |
Fluid temperature | -45~+200ºC | -45~+538ºC |
Connections | RF/BW | |
Body materials | A216WC,A217WC6/9,A351CF8,A351CF8M etc | |
Ball Materials | A182 F304/F316/316L | |
Ball Treatment | Polishing/Hard Chromium Plating | Hard Chromium/Surfacing STL/Spary Ni60/Sparyed tungsten carbide |
Sealing Ring | PTFE/RTFE | Surfacing STL/Spary Ni55/Sparyed tungsten carbide |
Valve seat leakage | API 598 0 leakage | ANSI B16.014V API598 0 leakage |

Crafted with unmatched precision, the ball and seat of these extraordinary valves are enhanced with advanced, hard coatings of either chrome carbide or tungsten carbide. This superior fortification ensures they offer exceptional resistance to erosion and abrasion, significantly enhancing their longevity and reliability, while maintaining peak operational efficiency.
Our SNT High Performance Soft Seated Ball Valves are equipped with a state-of-the-art HVOF coating system. Each valve undergoes meticulous mate-lapping using proprietary techniques to ensure a flawless 100% sealing. The innovative live loading feature guarantees zero emissions, keeping the ball in constant contact with the seat to effectively wipe away contaminants. This pioneering self-cleaning mechanism prevents interference and damage from particles, making these valves the ideal solution for demanding slurry and abrasive service applications. Experience the pinnacle of reliability and efficiency with every use.









Ingeniously designed with an anti-blowout feature, this innovation safeguards against stem blowouts, thus preventing potential damage and ensuring peace of mind.
The seat ring structure, featuring a wave spring and dual-scraper mechanism, expertly cleans the ball surface while maintaining impeccable sealing performance.
Our dual-sealing system meticulously prevents leakage, ensuring unparalleled leakage class by intelligently isolating flow from the spring.
The meticulously crafted design for draining and sweeping effectively prevents valve jamming by maintaining cleanliness and fluidity.
Proudly complying with API 607 standards, our product boasts fire-proof and anti-static capabilities, ensuring safety and reliability.

Their Outstanding Features Include:
Streamlined design for effortless disassembly, simplifying your operations.
Crafted with a focus on ease of maintenance, our ball valves incorporate a non-tight fit design that allows for swift servicing, thereby reducing downtime during regular maintenance and ensuring uninterrupted operations.
Cutting-edge sealing technology for unparalleled security and performance.
The multi-layer sealing system of stem and body offers dual protection through the integration of an O-ring with graphite or PTFE, delivering extraordinary sealing capabilities and reliability.
This innovative design rigorously meets the exacting standards of TA-Luft/Shell SPE 77/312.
Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves undergo sophisticated processing techniques such as spray welding, spraying, and fusion welding, ensuring a hardness range of HRC58-73 and a binding force of 80-40MPa. With an impressive lifecycle exceeding 100,000 on-off operations and a leakage class of ANSI VI, these valves are designed for longevity and superior performance.
Modular Design for Enhanced Convenience
The modular inner sealing design facilitates easy interchangeability between soft and metal seats, offering flexibility and reliability to meet varied operational needs efficiently.
Varied Connection Types for User Convenience
Our valves are available in a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. They all conform to international standards, ensuring seamless, user-friendly integration into your systems, enhancing operational efficiency.
Extensive Application Experience Guarantees Reliability
SNT Valves have built a formidable reputation through their widespread application in industries such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We offer optimal solutions tailored to specific service conditions, ensuring unmatched reliability and market leadership.








SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished leader in the control valve manufacturing industry, offering a perfect synergy of production, design, sales, and comprehensive services. Nestled in the breathtaking city of Qingdao in Shandong province, our expansive facility covers an impressive 42,000m², featuring cutting-edge workshops and state-of-the-art production machinery. As a high-tech enterprise, we take pride in possessing exclusive intellectual property rights, empowered by global management and manufacturing expertise. Our vibrant team of over 150 skilled professionals includes 15% dedicated to pioneering research & development, and 30% holding advanced academic qualifications. With an unwavering commitment to innovation and excellence, we engineer top-quality valves widely deployed in the petrochemical, oil, and coal chemical industries. Remarkably, our sales revenue soared to nearly 100 billion in 2017, reflecting our robust market presence and industry leadership.
SNT is honored to hold the esteemed TS special equipment manufacturing certificate and ISO 9001 accreditation, underscoring our dedication to quality and reliability. Our unwavering commitment to excellence is further validated by net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our extensive portfolio encompasses numerous national patents across a spectrum of advanced technologies. Our expertise lies in the design and manufacturing of a comprehensive range of valves that meet ANSI, API, DIN, BS, and JIS standards. By integrating the finest attributes of globally renowned valves with our proprietary R&D, we proudly offer a diverse array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, each crafted to perfection.
Our extraordinary product range further comprises T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, and Self-operated Control Valves, among others. We offer a wide variety of operational modes such as manual, power-driven, pneumatic, and hydraulic operation. The main component materials used include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications encompass sizes ranging from 1/2" to a grand 120", capable of withstanding working pressures from ANSI 150# to 2500#, and operational temperatures spanning from an extreme -196ºC to a staggering 1100ºC.
Harnessing advanced production technology and a robust quality assurance system, SNT valves are indispensable to a multitude of industries including petrochemical, oil, steel & iron, paper manufacturing, and power generation stations. Our elite roster of clients features prestigious names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, among many others, all testament to our trustworthiness and excellence.
Driven by a focus on maximizing customer profitability, we are wholeheartedly committed to establishing an exceptional quality standard and a reputable brand. Our extensive quality assurance protocols and dedicated after-sales service systems ensure that SNT valves foster prosperous and enduring partnerships with each of our esteemed clients.