- 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 and seat components are meticulously enhanced with hard coatings of either chrome carbide or tungsten carbide. These remarkable materials offer superior erosion and abrasion resistance, ensuring long-lasting durability and efficient operation.
At SNT Machinery, we employ an advanced HVOF coating system and apply a specialized mate-lapping technique developed in-house. This ensures 100% sealing efficiency, bolstered by live loading that guarantees zero emissions. The innovative design keeps the ball in constant contact with the seat, effectively wiping away contaminants. This self-cleaning action safeguards the valve against interference and damage from foreign particles, making it exceptionally suitable for both slurry and abrasive service applications.
SNT Ball Valves are meticulously crafted to adhere to a myriad of international standards, including ASME B 16.34-2009, ASME B16.10-2000, and API 589-2009. This exceptional series finds extensive applications in diverse sectors such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations.
Distinctive Features
Its simplistic architecture allows for swift disassembly, ensuring user convenience.
With regular maintenance schedules, our ball valves are engineered for effortless upkeep thanks to a non-tight fit design that minimizes service time.
Cutting-edge sealing technology assures unparalleled safety and security.
The multi-layered sealing of both the stem and body delivers robust dual protection through the integration of O-ring and graphite or PTFE components.
This advanced design complies seamlessly with TA-Luft/Shell SPE 77/312 standards, assuring reliability.
Enduring Longevity, Enhanced Cost-Effectiveness
For metal-sealed ball valves, sophisticated processing techniques such as spray welding, spraying, and fusion welding are employed on the ball and seat ring. This ensures hardness levels ranging from HRC58-73 and binding strengths of 80-40MPa. Moreover, they are capable of enduring over 100,000 on-off cycles with a leakage class of ANSI VI.


Convenience Through Modular Design
The innovative modular design of the inner sealing facilitates the interchangeability of soft and metal seats for enhanced assurance.
Versatile Connection Types for Ease of Use
Our diverse connection options, including flanged types (RF, FF, FM, G, RJ), screw-thread types, and BW types, align with international standards, providing seamless and flexible usage.
Extensive Application Experience Ensures Reliability
SNT Valves are extensively utilized across industries such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We boast a sterling market reputation by providing well-founded solutions tailored to service conditions.


Our innovative packing combination is engineered to meet stringent regulatory demands by efficiently accommodating transmission requirements of 100 ppm. Simultaneously, it ingeniously reduces friction by an impressive 20% at the stem, ensuring smoother operation and enhanced durability.
2. The seat ring's advanced structure, featuring a wave spring and dual-scraper, is adept at maintaining the pristine condition of the ball surface, while simultaneously ensuring an uncompromising seal for optimal performance.
3. Our sophisticated dual-sealing system is adept at ensuring superior leakage prevention, strategically designing the flow to avoid contact with the spring, thus maintaining an impeccable leakage class.
4. Experience unmatched reliability with the soft seat's sealing performance, which offers unparalleled stability and consistency for all your operational needs.
5. The innovative draining and sweeping design is meticulously crafted to avert any valve jamming incidents by effectively cleaning and maintaining the valve's pristine condition.
6. Our products adhere to API 607 standards, incorporating robust fire-proof and anti-static functionalities, providing you with peace of mind through enhanced safety features.











SNT Machinery (Qingdao) Co., Ltd stands as a beacon of innovation in the production of control valves. Seamlessly integrating manufacturing, design, sales, and service, we are poised for swift advancement. Nestled in the vibrant city of Qingdao, Shandong province, our expansive 42,000m2 facility boasts cutting-edge workshops and state-of-the-art equipment. As a high-tech enterprise, we pride ourselves on possessing independent intellectual property rights and leveraging advanced international management and production methodologies. Our dedicated team comprises over 150 skilled professionals, with 15% driven by research and development, and an impressive 30% holding graduate or higher degrees. Through a synergy of top-tier production management and pioneering technological R&D, SNT Machinery excels in delivering superior valves catering to the petrochemical, oil, and coal chemical sectors. Our remarkable sales reached nearly 100 billion in 2017, underscoring our commitment to excellence.
SNT Machinery has proudly achieved the TS Special Equipment Manufacturing Certificate alongside ISO 9001 certification. We have earned the esteemed net qualification certificates from industry leaders such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative technologies have garnered national patents, affirming our expertise in designing and manufacturing a complete spectrum of valves aligned with ANSI, API, DIN, BS, and JIS standards. In our pursuit of excellence, we merge global valve innovations with our proprietary R&D, enabling us to craft an extensive 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 offerings extend to 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 options, encompassing manual, power-driven, pneumatic, and hydraulic systems. Our main components are fabricated from premium materials such as A216 WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120", with working pressures spanning ANSI 150# to 2500#, and operational temperatures from -196ºC to 1100ºC.
With our advanced production technology management and robust quality assurance systems, SNT Valves are extensively utilized across the petrochemical, oil, steel & iron, paper manufacturing, and power station industries. We are honored to serve esteemed clients, including SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and many others.
At SNT Machinery, we prioritize our users' profitability, dedicating ourselves to establishing a hallmark of superior quality and brand prestige. Our impeccable quality assurance and comprehensive after-sales support systems ensure that SNT valves build lasting partnerships with all our clients, fostering mutual prosperity and success.