- 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 ball valves feature balls and seats that are meticulously hard-coated with either chrome carbide or tungsten carbide. This advanced coating technology imparts exceptional resistance to erosion and abrasion, ensuring long-lasting durability and performance under extreme conditions.
At SNT Machinery, we employ cutting-edge HVOF coating systems. Our proprietary mate-lapping technique guarantees a flawless 100% seal, while live loading ensures zero emissions. The innovative design keeps the ball constantly seated, effectively wiping away contaminants. This self-cleaning feature significantly reduces interference and potential damage, making these valves ideal for both slurry and abrasive service environments. Trust in our robust solutions for superior performance.
The SNT Ball Valves are meticulously crafted to align with a wide array of prestigious international standards, including ASME B 16.34-2009, ASME B16.10-2000, and API 589-2009. These exceptional products find extensive applications across diverse sectors such as petroleum, chemical industry, light industry, pharmacy, paper-making, metallurgy, and power stations.
They boast remarkable features as highlighted below:
Ingeniously simple structure allows for effortless and swift disassembly.
Regular maintenance ensures our ball valves are designed for easy upkeep, featuring a non-tight fit that significantly reduces servicing time.
Cutting-edge sealing technology ensures unparalleled security.
Our multi-layer combined sealing system, utilizing a sophisticated blend of O-ring and graphite or PTFE, provides robust double sealing for unmatched safety.
This innovative design complies with the stringent TA-Luft/Shell SPE 77/312 standards.
Extended service life delivers exceptional cost-efficiency.
With advanced techniques like spray welding, spraying, and fusion welding, our metal-sealed ball valves boast impressive durability, achieving a hardness of HRC58-73 and a binding force of 80-40MPa. They are capable of withstanding over 100,000 on-off cycles and meet ANSI VI leakage standards.


Modular design ensures unparalleled convenience.
The innovative modular design of the inner sealing allows for seamless interchangeability between soft and metal seats, enhancing adaptability.
Versatile connection types provide ultimate user comfort.
Our valves come with various connection options, including flanged type (RF, FF, FM, G, RJ), screw-thread type, and BW type, all of which conform to international standards for convenient and flexible usage.
Extensive application experience guarantees reliability.
SNT Valves have earned widespread acclaim across industries such as petroleum, chemical, light industry, pharmacy, paper-making, metallurgy, and power stations. Our reputation for excellence is fortified by providing pragmatic solutions tailored to specific service conditions.


Our unique special packing combination is expertly engineered to meet stringent smission requirements of 100 ppm, while also reducing friction by an impressive 20% at the stem, ensuring smooth and efficient operations.
2. The innovative seat ring structure, incorporating a wave spring and dual-scraper, is designed to meticulously clean the ball surface, ensuring impeccable sealing and enhanced longevity of the valve.
3. Our dual-sealing technology is crafted to guarantee superior leakage class performance by ensuring that the flow does not come into contact with the spring, thereby preserving the integrity of the seal.
4. The sealing performance of our soft seat is engineered for superior stability and reliability, providing consistent and long-lasting sealing effectiveness.
5. The innovative design of our draining and sweeping features effectively prevents the valve from becoming jammed, ensuring continuous cleanliness and uninterrupted functionality.
6. Fully compliant with stringent API 607 standards, our valves boast fire-proof and anti-static capabilities, ensuring maximum safety and reliability in demanding environments.











SNT Machinery (Qingdao) Co., Ltd stands as a pioneering force in the realm of control valve production, combining manufacturing, design, sales, and service into a single, dynamic entity. Strategically situated in the vibrant city of Qingdao, Shandong province, our enterprise spans an impressive 42,000 square meters, featuring state-of-the-art workshops and cutting-edge production equipment. As a high-tech enterprise, we proudly hold independent intellectual property rights and have embraced world-class management and production practices from abroad. Boasting a skilled workforce exceeding 150 employees, we dedicate 15% to research and development, while 30% hold advanced degrees. Fueled by our exceptional production management team and groundbreaking technological innovations, we deliver an extensive range of superior quality valves serving the petrochemical, oil, and coal chemical industries. In 2017 alone, our sales value soared to nearly 100 billion.
SNT Machinery has proudly attained the prestigious TS Special Equipment Manufacturing Certificate and ISO 9001 certification. Our qualifications extend to include the net qualification certificate from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our technological prowess is further evidenced by numerous National Patents. We excel in designing and manufacturing a comprehensive range of valves compliant with ANSI, API, DIN, BS, and JIS standards. By integrating the strengths of renowned global valves with our own innovative research and development, SNT now produces an extensive array of valves. Our offerings include GLOBE Valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our diverse valve selection also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. We offer varied driving forms such as manual, power-driven, pneumatic, and hydraulic operations. The main components are crafted from materials including A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120", supporting working pressures of ANSI 150# to 2500#, and capable of operating within temperatures from -196ºC to 1100ºC.
With our advanced production technology, rigorous management, and quality assurance systems, SNT Valves proudly serve a vast array of industries such as petrochemical, oil, steel & iron, paper manufacturing, and power generation. Esteemed clients include SINOPEC's QILU and Qingdao branches, CNOOC Huizhou Refinery, PETROCHINA's Guangxi and Ningxia branches, and SINOPEC's Changling and Jinan branches, among others.
We place our customers' profitability at the heart of our mission, dedicating ourselves to crafting exceptional quality and building a reputable brand. Our impeccable quality assurance and after-sales service systems ensure that SNT Valves forges prosperous partnerships with all of our valued clients, embarking on a journey of shared success and prosperity.