- 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 state-of-the-art ball valves and seats are enhanced with an advanced hard coating of either chrome carbide or tungsten carbide. This meticulous coating process endows the valves with unparalleled erosion and abrasion resistance, ensuring superior durability and longevity in challenging operational conditions.
At SNT Machinery, we employ a cutting-edge HVOF coating system, refined by our proprietary mate-lapping technique, guaranteeing 100% sealing efficiency. The innovative design includes live loading for zero emissions, with the ball permanently seated to effectively eliminate contaminants. This self-cleaning mechanism safeguards against interference and abrasion, making our valves the optimal choice for slurry and abrasive service requirements.
SNT Ball Valves are crafted to meet a diverse array of international standards, including ASME B 16.34-2009, ASME B16.10-2000, and API 589-2009, among others. This esteemed series is extensively utilized across industries such as petroleum, chemical processing, light industry, pharmaceuticals, paper-making, metallurgy, and power stations, demonstrating its versatile application potential.
Distinctive Features Include:
A simple structure that facilitates quick disassembly, ensuring hassle-free maintenance.
Thanks to the periodic maintenance of all valves, our ball valves are engineered for easy servicing. The non-tight fit design significantly reduces maintenance time, enhancing operational efficiency.
Advanced sealing technology ensures unparalleled security.
The innovative multi-layer combined sealing of the stem and body delivers dual sealing protection through a sophisticated combination of O-ring and graphite or PTFE.
This superior design complies with stringent standards such as TA-Luft and Shell SPE 77/312, affirming its reliability.
Extended Service Life for Ultimate Cost-Effectiveness
Our metal-sealed ball valves boast advanced processing techniques for the ball and seat ring, including spray welding, spraying, and fusion welding. This ensures a hardness range of HRC58-73 and a binding force of 80-40MPa. Remarkably, the on-off cycle exceeds 100,000 times, while maintaining an ANSI VI leakage class.


Modular Design for Exceptional Convenience
The modular inner sealing design allows for the interchangeability of soft and metal seats, offering unmatched flexibility.
Diverse Connection Types for User Comfort
Our valves support multiple connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW types. These international standards ensure ease of use and adaptability.
Extensive Application Expertise Ensures Reliability
SNT Valves are renowned in sectors such as petroleum, chemical processing, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. Our sterling reputation in the market is backed by delivering practical, reliable solutions tailored to specific service conditions.


Our unique special packing combination is expertly engineered to meet stringent emission requirements of 100 ppm, significantly reducing stem friction by an impressive 20%.
2. The innovative seat ring structure with wave spring and dual-scraper technology is designed to impeccably clean the ball surface while ensuring a superior seal.
3. A state-of-the-art dual-sealing mechanism guarantees exceptional leakage protection by expertly isolating the flow from contacting the spring.
4. Experience the stability and reliability of our soft seat's sealing performance, engineered for consistency and peace of mind.
5. Our ingeniously designed draining and sweeping feature effectively prevents valve jamming by thoroughly cleansing the system.
6. Adhering to the rigorous API 607 standards, our valves are built to withstand fire and prevent static, ensuring safety and compliance.











SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished pioneer in the realm of control valve production, seamlessly integrating manufacturing, design, sales, and service into one cohesive entity. Situated in the dynamic city of Qingdao, Shandong Province, SNT spans an impressive 42,000 square meters, boasting state-of-the-art workshops and advanced production equipment. As a recognized high-tech enterprise with proprietary intellectual property rights, SNT imports cutting-edge management and production expertise. With a dedicated workforce of over 150, of which 15% are innovative R&D specialists and 30% hold graduate or higher degrees, SNT leverages a top-tier production management team and visionary technology R&D. We proudly produce a vast array of high-quality valves essential for the petrochemical, oil, and coal chemical sectors, achieving a remarkable sales figure nearing 100 billion in 2017.
SNT has proudly secured the TS Special Equipment Manufacturing Certificate and ISO 9001 certification and obtained net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With multiple national patents, our prowess in technology is unmatched. We adeptly design and manufacture comprehensive valve series aligned with ANSI, API, DIN, BS, and JIS standards. By combining the global advantages of renowned valves with our proprietary research and development, we excel in producing a wide spectrum of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and Three-eccentric Center Butterfly Valves.
Our extensive valve offerings also include V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. The driving mechanisms range from manual operations to power-driven, pneumatic, and hydraulic drives. Main components are crafted from premium materials such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, with specifications from 1/2" to 120", suitable for working pressures of ANSI 150# to 2500# and temperatures spanning -196ºC to 1100ºC.
Underpinned by advanced production technology management and a robust quality assurance system, SNT Valves are omnipresent across sectors like petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many more, showcasing our widespread industrial impact and trust.
At SNT, we prioritize our users' profits, committing ourselves to stellar quality and brand excellence. Our faultless quality assurance and after-sales systems ensure SNT valves collaborate with our customers in creating enduring prosperity, establishing a legacy of success built on mutual trust and innovation.