- 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 valves boast a ball and seat that are meticulously hard coated with robust materials such as chrome carbide or tungsten carbide. This innovative coating ensures exceptional resistance to erosion and abrasion, providing the durability you require for demanding environments.
SNT employs an advanced HVOF coating system, ensuring each valve is mate-lapped using our proprietary technique for impeccable 100% sealing. The live loading feature guarantees zero emissions. Ingeniously designed, the ball remains in constant contact with the seat, deftly sweeping away contaminants. This self-cleaning mechanism not only prevents interference and damage from foreign particles but also makes the valve an ideal choice for slurry and abrasive services.








They boast the following exceptional characteristics:
The straightforward structure facilitates quick and easy disassembly.
Thanks to the periodic maintenance of all valves, our ball valves are designed for effortless maintenance. The non-tight fit design significantly reduces servicing time, enhancing efficiency.
State-of-the-art sealing ensures maximum security.
A multi-layered combined sealing system of the stem and body offers dual sealing capabilities through the integration of O-ring and graphite or PTFE, ensuring robust protection.
This innovative design adheres to TA-Luft and Shell SPE 77/312 standards, guaranteeing compliance and reliability.
Extended service life promotes cost-effectiveness.
For metal-sealed ball valves, advanced processing techniques like spray welding, spraying, and fusion welding are employed for the ball and seat ring. This ensures a hardness level of HRC58-73 and a binding force of 80-40MPa. Additionally, these valves can exceed 100,000 on-off cycles while maintaining an ANSI Class VI leakage standard.
The modular design enhances convenience.
With a modular design in inner sealing, the interchangeability between soft and metal seats is assured, providing versatile and adaptable solutions.
Multiple connection options ensure user-friendly operation.
Offering a diverse range of connection types, including flanged types (RF, FF, FM, G, RJ), screw-thread types, and BW types, these are internationally recognized standards that assure ease of use and convenience.
Our vast experience in application ensures reliability.
SNT Valves have been extensively implemented in petroleum, chemical industries, light industries, pharmacy, paper-making, metallurgy, and power stations. Our esteemed reputation is built on providing reasonable solutions tailored to specific service conditions, ensuring trust and reliability in the market.
A unique packing combination is engineered to achieve the emission requirement of 100 ppm while simultaneously reducing the friction against the stem by 20%, ensuring smoother operations.
2. The wave spring and dual-scraper seat ring construction cleans the ball surface efficiently, maintaining a tight seal for optimal performance.
3. Dual-sealing technology ensures outstanding leakage prevention by tactically directing flow away from the spring, thus enhancing reliability.
4. Soft seat sealing performance is remarkably stable and consistently reliable, providing peace of mind for critical applications.
5. The strategic design of draining and sweeping mechanisms prevents blockage by effectively cleaning the valve, ensuring uninterrupted function.
6. Adhering to API 607 standards, the valve features robust fire-proof and anti-static capabilities, meeting high safety and performance requirements.









SNT Machinery (Qingdao) Co., Ltd. is a leading innovator and manufacturer in the realm of control valves, seamlessly blending manufacturing, design, sales, and service into a singular powerhouse of excellence. With a high starting point for rapid development, SNT proudly calls Qingdao, Shandong province its home, sprawled over a vast 42,000 square meters. Our state-of-the-art workshops and cutting-edge production equipment symbolize our commitment to quality and advancement. Recognized as a high-tech enterprise with a treasure trove of independent intellectual property rights, we have seamlessly integrated advanced management and production methodologies from global leaders. Our dynamic team of over 150 dedicated professionals includes a remarkable 15% who specialize in Research and Development, and an impressive 30% are graduates with advanced degrees. Driven by our elite production management team and groundbreaking technology innovations, we manufacture superior quality valves that serve the petrochemical, oil, and coal chemical industries with finesse. In 2017, our sales value soared to nearly 100 billion yuan.
Today, SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, and has secured net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our prowess in innovation is evidenced by numerous National Patents. We possess the expertise to design and craft a full spectrum of valves in adherence to ANSI, API, DIN, BS, and JIS standards. Drawing inspiration from the world's most renowned valves, combined with our pioneering research and development, we have mastered the art of manufacturing diverse valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and 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, and Cryogenic Valves. Our versatile driving mechanisms encompass manual, power-driven, pneumatic, and hydraulic operations. The materials we utilize for core components include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ensuring unmatched durability and performance. Our valves boast specifications ranging from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and resiliently operate in temperatures ranging from -196ºC to 1100ºC.
Harnessing our advanced production technologies and stringent quality assurance systems, SNT valves have become a trusted choice in industries such as petrochemicals, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, among others.
At SNT, our customers' prosperity is our mission. We are devoted to establishing a reputation for unparalleled quality and a distinguished brand. Our impeccable quality assurance and dedicated after-sales service systems are the bedrock of our enduring partnerships, as we join hands with our clients to create shared success and prosperity.