- Overview
- Product Parameters
- Product Description
- Our Advantages
- Structural Features
- Production application
- Company Profile
Basic Info.
Product Description
Body type | AOC-3841 | AOC3842 |
Body size | 1/2''(15A)-6''(150A) | 1/2''(15A)-6''(150A) |
Body rating | ANSI 150-600 | ANSI150-600 |
Fluid temperature | -45~+200ºC | -45~+538ºC |
Nominal diameter | DN15-DN150 | DN15-DN150 |
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 |

Our ball and seat are fortified with superior hard coatings of chrome carbide or tungsten carbide, offering exceptional resistance to erosion and abrasion. This meticulous construction guarantees durability and reliability under the most rigorous conditions.
Utilizing the advanced HVOF coating system, SNT Machinery masterfully crafts each component with our proprietary mate-lapped technique, delivering an impeccable 100% sealing solution. The innovative live loading mechanism further ensures zero emissions. Unique in its design, the ball continuously maintains contact with the seat, effectively eliminating contaminants with a self-cleaning action. This feature is paramount for preventing interference and damage, making this valve an optimal choice for slurry and abrasive services.








These valves boast distinctive features as listed below,
Ingenious simplicity in design facilitates rapid disassembly, making maintenance a breeze.
Owing to our commitment to regular upkeep, SNT's ball valves provide exceptional ease of maintenance. The innovative non-tight fit design significantly reduces servicing time.
State-of-the-art sealing technology ensures unparalleled security.
Our multi-layered sealing system, comprising both stem and body seals, delivers double protection via the synergistic use of an O-ring and graphite or PTFE, ensuring optimal performance.
This cutting-edge design complies fully with TA-Luft and Shell SPE 77/312 standards.
Extended longevity translates into superior cost efficiency.
Advanced manufacturing techniques, such as spray welding, spraying, and fusion welding, are employed on metal-sealed ball valves to enhance the hardness of HRC58-73 and the binding force of 80-40MPa. This results in over 100,000 operation cycles with a leakage class of ANSI VI.
Innovative modular design maximizes user convenience.
The modular inner sealing design facilitates the interchangeability of soft and metal seats, ensuring versatility for various applications.
Diverse connection options ensure user-friendly operation.
Our valves feature versatile connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW types. These international standards guarantee ease of use and adaptability.
Our extensive industry experience ensures dependable performance.
Widely acclaimed in petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power sectors, SNT Valves enjoy an esteemed market reputation. We provide insightful and pragmatic solutions tailored to specific service conditions.
Our innovative packing combination is engineered to meet stringent transmission requirements of 100 ppm, all while reducing friction by an impressive 20% on the stem, ensuring smooth operation and long-lasting performance.
2. Featuring a seat ring structure with a wave spring and dual-scraper mechanism, our design effectively cleans the ball surface while maintaining impeccable sealing integrity.
3. The dual-sealing mechanism is expertly crafted to ensure a superior leakage class by preventing flow from contacting the spring, reinforcing the valve's reliability.
4. Experience unmatched stability and reliability with our soft seat's advanced sealing performance, crafted for consistency and dependability.
5. Our valve features a robust draining and sweeping design that effectively prevents jamming by maintaining cleanliness, ensuring uninterrupted performance.
6. Meticulously engineered to comply with API 607 standards, our valve boasts fire-proof and anti-static capabilities, providing ultimate safety and reliability.









SNT Machinery (Qingdao) Co., Ltd is a premier producer of control valves, seamlessly integrating manufacturing, design, sales, and services. As a company that started with a high benchmark, SNT has swiftly developed and is strategically located in the bustling city of Qingdao, Shandong province, sprawling over an impressive 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment epitomize modern high-tech enterprise excellence. With independent intellectual property rights and the adoption of advanced global management and production techniques, SNT boasts a dynamic team of over 150 skilled workers. Among them, 15% are dedicated R&D specialists, and 30% hold graduate or higher degrees. Driven by a high-caliber production management team and our passion for innovative technological research, we specialize in crafting a wide range of premium quality valves for the petrochemical, oil, and coal chemical industries. Our sales reached an astounding value nearing 100 billion in 2017.
SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 accreditation. Additionally, we have earned the network qualification certificates from giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation has garnered numerous national patents across various technologies. Leveraging a blend of global valve design excellence and our pioneering R&D, we are equipped to design and manufacture an extensive series of valves conforming to ANSI, API, DIN, BS, and JIS standards. Our diverse production capabilities include GLOBE Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves, to name a few.
Our versatile offerings extend to V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves, among others. We offer a range of driving methods including manual, power-driven, pneumatic, and hydraulic drives. Primary materials used include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, and more. Specifications range from 1/2" to a robust 120", withstanding working pressures from ANSI 150# to 2500#, and operational temperatures from a chilly -196ºC up to a blistering 1100ºC.
With a staunch focus on advanced production technology management and an unwavering quality assurance system, SNT Valves have become a trusted choice across diverse industries such as petrochemical, oil, steel and iron, paper manufacturing, and power stations. Our esteemed clientele includes industry titans like SINOPEC's QILU and Qingdao branches, CNOOC's Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, and many more.
We prioritize our clients' profitability, dedicating ourselves to building a reputation for exceptional quality and a distinguished brand. Our comprehensive quality assurance and after-sales systems ensure that SNT Valves forge prosperous partnerships with all our customers, paving the way for mutual success.