- 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 |

Expertly crafted for superior durability, the ball and seat of these valves are fortified with a robust hard coating of either chrome carbide or tungsten carbide, known for their exceptional erosion and abrasion resistance.
At SNT Machinery (Qingdao) Co., Ltd., we employ an advanced HVOF coating system. Our innovative mate-lapping technique guarantees an impeccable 100% sealing. Enhanced with live loading, our design ensures zero emissions by maintaining the ball in constant contact with the seat, effectively wiping contaminants away. This self-cleansing action safeguards against interference and damage from impurities, making our valves especially ideal for challenging slurry and abrasive service applications.
SNT Ball Valves are meticulously crafted to align with a multitude of prestigious international standards, including ASME B 16.34-2009, ASME B16.10-2000, and API 589-2009, among others. This exceptional series of products finds versatile applications across various industries such as petroleum, chemical manufacturing, light industry, pharmaceuticals, paper production, metallurgy, and power generation.
These ball valves boast remarkable features as outlined below,
The simple structure of our ball valves allows for quick disassembly, facilitating easy maintenance and efficient handling.
With periodic maintenance protocols in place, our ball valves are designed for ease of service. The non-tight fit design significantly reduces servicing time, ensuring seamless operation.
The advanced sealing technology employed guarantees utmost security and reliability in operation.
Our innovative multi-layer combined sealing of the stem and body provides dual sealing protection through a strategic blend of O-rings and graphite or PTFE.
Engineered to perfection, this design complies with the stringent TA-Luft and Shell SPE 77/312 standards, assuring top-tier performance.
The impressive longevity of our ball valves contributes to exceptional cost-effectiveness, making them a wise investment.
For metal-sealed ball valves, we employ cutting-edge processing techniques such as spray welding, spraying, and fusion welding. This ensures a hardness of HRC58-73 and a binding force of 80-40MPa. Remarkably, our valves can perform over 100,000 on-off cycles with a leakage class of ANSI VI.


Our modular design offers unparalleled convenience and adaptability.
The modular design of our inner sealing system allows for the interchangeability of soft and metal seats, providing flexibility and assurance in performance.
With a variety of connection types, our ball valves offer unparalleled convenience and ease of use.
The connection options include flanged types (RF, FF, FM, G, RJ), screw-thread types, and BW types. These internationally recognized connections ensure user-friendly and versatile applications.
Our extensive experience in diverse applications ensures the reliability and trustworthiness of our offerings.
SNT Valves have been extensively utilized in industries such as petroleum, chemical processing, light manufacturing, pharmaceuticals, paper-making, metallurgy, and power stations. We have earned a stellar reputation in the market, providing reasonable solutions tailored to specific service conditions.


Our innovative special packing combination is expertly designed to meet the stringent smission requirement of 100 ppm, while ingeniously reducing friction to the stem by an impressive 20%.
2. Featuring a sophisticated seat ring structure with a wave spring and dual-scraper, our design efficiently cleans the ball surface, ensuring immaculate sealing at all times.
3. Our advanced dual-sealing technology guarantees superior leakage class by ingeniously preventing the flow from contacting the spring, thus enhancing operational reliability.
4. Experience unparalleled sealing performance with our soft seat design, offering stability and reliability that surpasses expectations.
5. The innovative design of draining and sweeping is expertly formulated to prevent valve jamming, maintaining optimal cleanliness and functionality.
6. Fully compliant with API 607 standards, our valves boast exceptional fire-proof and anti-static functions, offering unmatched safety and peace of mind.











SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished leader in the realm of control valve production, seamlessly integrating manufacturing, design, sales, and service into one cohesive operation. With a strong foundation for dynamic growth, SNT is nestled in the vibrant city of Qingdao, Shandong Province, sprawling over an expansive 42,000m², and featuring cutting-edge workshops and state-of-the-art production facilities. As a trailblazing high-tech enterprise, SNT boasts independent intellectual property rights and has embraced advanced international management and production methodologies. With a dedicated workforce of over 150, where 15% are R&D specialists and 30% hold graduate or higher degrees, SNT leverages a top-tier production management team and pioneering technological research to produce high-quality valves extensively utilized in the petrochemical, oil, and coal chemical sectors. Our stellar sales performance reached nearly 100 billion in 2017.
SNT proudly holds the TS Special Equipment Manufacturing Certificate and ISO 9001 certification, alongside net qualifications from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. With numerous national patents to our name, SNT excels in designing and manufacturing a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the superior features of globally renowned valves with our independent R&D, we are proficient in crafting an extensive array of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves. Our repertoire also includes T Three-eccentric Center Butterfly Valves and more.
Our diverse valve offerings encompass V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. We provide versatile driving mechanisms including manual operation, power-driven, pneumatic, and hydraulic drives. The primary materials used in our valves include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Specifications range from 1/2" to 120", with working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC.
Thanks to our innovative production technology and robust quality assurance system, SNT Valves have garnered widespread acclaim across various industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Prestigious clientele such as SINOPEC QILU Branch, SINOPEC Qingdao Branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi Branch, and PETROCHINA Ningxia Branch, among others, underscore our commitment to excellence.
At SNT, we prioritize our users' profitability, dedicating ourselves to establishing unmatched quality and a reputable brand. Our comprehensive quality assurance and after-sales systems ensure that SNT valves foster enduring partnerships with all our customers, driving shared success and prosperity.