- 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 meticulously crafted ball and seat are fortified with a hard chrome carbide or tungsten carbide coating, endowing them with outstanding resistance against erosion and abrasion. This robust construction ensures durability and longevity, making it a superior choice for challenging environments.
SNT Machinery (Qingdao) Co., Ltd. employs the advanced HVOF coating system, meticulously developed for unparalleled sealing efficiency. Our proprietary mate-lapped technique guarantees a flawless 100% seal, complemented by live loading to ensure zero emissions. Ingeniously designed, the ball remains seated, effectively sweeping away contaminants, thereby preventing potential interference and damage. This self-cleaning mechanism renders the valve exceptionally suitable for both slurry and abrasive service applications.








They boast exceptional characteristics as outlined below:
Ingeniously simple structure allows for rapid disassembly, enhancing operational efficiency.
Thanks to routine maintenance, our ball valves feature a non-tight fit design that simplifies upkeep, ensuring easy maintenance and significantly reducing service time.
Cutting-edge sealing technology assures unparalleled safety and security.
The multi-layer combined sealing of stem and body delivers dual sealing benefits through the synergy of O-ring and graphite or PTFE, enhancing reliability.
This innovative design is compliant with TA-Luft/Shell SPE 77/312 standards, guaranteeing superior environmental protection.
Extended service life translates into significant cost savings over time.
For metal-sealed ball valves, advanced processing techniques such as spray welding, spraying, and fusion welding are employed on the ball and seat ring. This ensures a hardness range of HRC58-73 and a binding force of 80-40MPa, enabling over 100,000 on-off cycles with an ANSI VI leakage class standard.
Our modular design enhances convenience and adaptability.
The modular inner sealing design permits interchangeability between soft and metal seats, ensuring tailored solutions for diverse needs.
Multiple connection types for enhanced user experience.
Our valves offer versatile connection options, including flanged types (RF, FF, FM, G, RJ), screw-thread types, and BW types, all internationally standardized for seamless and intuitive use.
Decades of hands-on application expertise ensure steadfast reliability.
SNT Valve is extensively deployed across sectors such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We are renowned for delivering practical solutions tailored to specific service conditions, bolstered by a sterling reputation in the marketplace.
Our expertly engineered special packing combination is crafted to meet the stringent transmission requirement of 100 ppm. This innovation substantially reduces friction by 20%, ensuring superior performance and durability of the stem.
2. The wave spring and dual-scraper seat ring have been ingeniously structured to effectively clean the ball surface while maintaining impeccable sealing, ensuring optimal functionality and longevity.
3. Our dual-sealing feature is expertly designed to secure the leakage class by preventing the flow from contacting the spring, thereby ensuring maximum efficiency and performance.
4. Experience the stability and reliability of our soft seat sealing performance, which is crafted to deliver exceptional consistency and trustworthiness under various conditions.
5. The innovative draining and sweeping design is meticulously engineered to prevent the valve from jamming, ensuring it remains clean and operationally efficient at all times.
6. Designed in compliance with the esteemed API 607 standards, our product boasts outstanding fire-proof and anti-static functions, ensuring unparalleled safety and resilience.









SNT Machinery (Qingdao) Co., Ltd. stands as a dynamic producer of control valves, seamlessly integrating manufacturing, design, sales, and services into a single powerhouse. Positioned with a high starting point for rapid growth, SNT is strategically located in the vibrant city of Qingdao, Shandong province, spreading across an expansive 42,000 square meters, and boasting state-of-the-art workshops and cutting-edge production equipment. As a distinguished high-tech enterprise, SNT proudly holds independent intellectual property rights and leverages advanced international management and production methodologies. Our dedicated workforce exceeds 150 professionals, with 15% specializing in research and development, and 30% holding graduate or higher degrees. Our robust production management team and pioneering R&D efforts enable the mass production of premium-quality valves that are indispensable in the petrochemical, oil, and coal chemical industries. Remarkably, in 2017, our sales value soared to nearly 100 billion.
SNT has achieved prestigious certifications such as the TS Special Equipment Manufacturing Certificate and ISO 9001, and has earned notable qualifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio boasts numerous National Patents across various technologies. We have the expertise to design and manufacture an extensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. By integrating the strengths of world-renowned valves with our independent R&D, SNT is equipped to produce a diverse array of valve types including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
We also manufacture T 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, Cryogenic Valves, and more. Our driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic operations. The materials used for key components include A216 WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120", supporting working pressures from ANSI 150# to 2500#, and operating temperatures from -196°C to 1100°C.
Leveraging our cutting-edge production technology management and rigorous quality assurance systems, SNT valves are trusted across a variety of industries including petrochemical, oil, steel & iron, paper manufacturing, and power generation. Our esteemed clientele includes prominent names like SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and beyond. These industry leaders consistently rely on our expertise for their critical applications.
Placing our customers' success at the forefront, SNT is unwaveringly committed to establishing a legacy of superior quality and a reputable brand. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT valves remain the trusted ally of our clients, fostering mutual growth and creating shared prosperity.