- 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 |

Engineered for exceptional durability, the ball and seat are fortified with hard coatings of chrome carbide or tungsten carbide. These materials are renowned for their superior erosion and abrasion resistance, ensuring longevity and sustained performance in challenging environments.
SNT employs an advanced HVOF coating system, meticulously mate-lapped using proprietary techniques to guarantee 100% sealing. Live loading further assures zero emissions. Ingeniously designed, the ball remains in constant contact with the seat, effectively wiping away contaminants. This self-cleaning mechanism prevents interference and damage from foreign particles, making our valve ideally suited for slurry and abrasive services.








Distinctive Features of Our Ball Valves:
Ingenious construction ensures rapid disassembly,
With routine maintenance in mind, our ball valves are crafted for uncomplicated servicing. The non-tight fit design significantly reduces maintenance time, enhancing operational efficiency.
State-of-the-Art Sealing for Uncompromised Security,
The innovative multi-layer combined sealing system between the stem and body provides dual sealing capabilities, employing a strategic combination of O-ring and graphite or PTFE for maximum effectiveness.
This sophisticated design is compliant with TA-Luft and Shell SPE 77/312 standards.
Extended Durability for Cost-Effective Operations,
In our metal-sealed ball valves, we utilize cutting-edge processing techniques such as spray welding, spraying, and fusion welding on the ball and seat ring. This ensures a hardness of HRC58-73 and a binding force of 80-40MPa. Remarkably, these valves can perform over 100,000 on-off cycles, boasting a leakage class of ANSI VI.
Streamlined Modular Design for User Convenience,
The adaptable modular design of the inner sealing allows for easy interchangeability between soft and metal seats, ensuring optimal performance.
Versatile Connection Options for Effortless Use,
Our extensive range of connection types-including flanged (RF, FF, FM, G, RJ), screw-thread, and BW types-are widely recognized and facilitate seamless integration.
Proven Expertise for Trusted Reliability,
Backed by extensive application experience, SNT Valves are trusted across industries such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. Our stellar reputation is built on providing sound, practical solutions tailored to specific service conditions.
Our innovative packing combination excels by meeting stringent emission standards with a 100 ppm requirement, all while reducing friction against the stem by an impressive 20%!
2. The sophisticated wave spring and dual-scraper seat ring design actively cleans the ball surface, maintaining superior sealing integrity and performance.
3. With dual-sealing technology at its core, our valve effectively ensures that the flow is isolated from the spring, guaranteeing impeccable leakage class standards.
4. Experience unparalleled reliability and stability with our soft seat's sealing performance, crafted for consistency and precision.
5. The intelligent draining and sweeping design effectively prevents jamming, ensuring the valve remains clean and operationally efficient.
6. Fully compliant with API 607 standards, our product boasts robust fire-proof and anti-static functionalities for unmatched safety and security.









SNT Machinery (Qingdao) Co., Ltd is a trailblazing producer of control valves, seamlessly integrating manufacturing, design, sales, and services into a singular entity. Strategically positioned in Qingdao, Shandong province, our facility spans a vast 42,000m2 and boasts state-of-the-art workshops and production equipment. As a high-tech enterprise endowed with independent intellectual property rights, we have harnessed imported advanced management and production expertise to rapidly advance from a high starting point. Our team comprises over 150 dedicated employees, with 15% specializing in R&D and 30% holding graduate or higher degrees. Through our exceptional production management team and cutting-edge research and development, we have successfully produced large quantities of superior quality valves, serving the petrochemical, oil, and coal chemical industries with distinction. In 2017, our sales value soared to nearly 100 billion.
SNT has proudly obtained the TS special equipment manufacturing certificate and ISO 9001 certification. We have also secured the net qualification certificates of SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, along with numerous National Patents for various technologies. Our expertise allows us to design and manufacture a comprehensive range of valves in accordance with ANSI, API, DIN, BS, and JIS standards. By merging the best features of renowned global valves with our independent research and development, we now produce a diverse array of 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.
Our expansive product line features 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. Our drive options encompass manual, power-driven, pneumatic, and hydraulic solutions. We utilize premium materials for key components, including A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, with specifications ranging from 1/2" to 120". Our valves are engineered to withstand working pressures from ANSI 150# to 2500# and temperatures from -196ºC to 1100ºC.
Leveraging sophisticated production technology and a robust quality assurance system, SNT Valves have gained widespread adoption across petrochemical, oil, steel & iron, paper manufacturing, and power station industries. Our esteemed clientele includes SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling and Jinan branches.
We prioritize our users' success, dedicating ourselves to cultivating unmatched quality and a prestigious brand. Our impeccable quality assurance and after-sales systems ensure that SNT valves forge prosperous partnerships with all our customers, creating mutual prosperity and growth.