- Overview
- Product Parameters
- Product Description
- Structure Features
- Our Advantages
- Production application
- Company Profile
Basic Info.
Product Description
Body type | AOC-3843 | AOC3844 |
Body size | 1/2''(40A)-6''(600A) | 1/2''(40A)-24''(600A) |
Body rating | ANSI 150-2500 | ANSI150-2500 |
Fluid temperature | -45~+200ºC | -45~+538ºC |
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 |

Crafted with unmatched precision and fortified with advanced hard coatings in chrome carbide or tungsten carbide, the ball and seat of these valves stand as a testament to superior technology. This enhanced protection ensures extraordinary resistance to erosion and abrasion, significantly boosting the product's durability and reliability.
Our SNT High Performance Soft Seated Ball Valves feature a state-of-the-art HVOF coating system. With each valve meticulously mate-lapped using our proprietary techniques, we guarantee a flawless 100% sealing capability. The innovative live loading feature ensures zero emissions, while the ball maintains constant contact with the seat, effortlessly clearing away contaminants. This innovative self-cleaning feature prevents damage and interference from particles, making it the ultimate choice for slurry and abrasive service applications.









Featuring a robust anti-blowout design, our valve ensures the utmost safety by preventing stem ejection, thereby averting potential damage.
Ingeniously crafted, the wave spring and dual-scraper seat ring structure effectively cleans the ball surface, maintaining an impeccable seal.
Our dual-sealing mechanism ensures superior leakage protection, ingeniously preventing any contact between the flow and the spring to uphold the highest leakage class.
The innovative design of our draining and sweeping mechanism actively prevents valve jamming, ensuring seamless operation through thorough cleaning.
Engineered to comply with API 607 standards, our valves are equipped with essential fire-proofing and anti-static functions to enhance operational safety.

Discover Their Exceptional Features:
Streamlined and user-friendly design ensures effortless disassembly.
With maintenance simplicity in mind, our ball valves boast a non-tight fit design, facilitating swift servicing and minimizing downtime during scheduled maintenance intervals.
State-of-the-art sealing technology ensures unparalleled security.
The multi-layer sealing between stem and body offers dual protection through an ingenious blend of O-ring and graphite or PTFE, guaranteeing superior sealing performance.
This groundbreaking design adheres to the stringent TA-Luft/Shell SPE 77/312 standards.
Prolonged Service Life Enhances Cost-Efficiency
Our metal seated ball valves undergo advanced processing techniques like spray welding, spraying, and fusion welding. This results in a hardness range of HRC58-73 and a bonding force of 80-40MPa, boasting an extraordinary operational cycle lifespan exceeding 100,000 operations, with a leakage class certified at ANSI VI.
Modular Design Elevates Convenience
A modular inner sealing design enables seamless interchangeability between soft and metal seats, ensuring both flexibility and enduring reliability.
Diverse Connection Types for Enhanced User Convenience
Our valves come in various connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. All conform to international standards, ensuring seamless, user-friendly integration.
Vast Application Experience Ensures Reliability
SNT Valves have earned an exceptional reputation through extensive use in petroleum, chemicals, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We offer optimal solutions tailored to specific service conditions, securing market-leading reliability.








SNT Machinery (Qingdao) Co., Ltd stands as a leading beacon in the control valves industry, seamlessly integrating production, innovative design, strategic sales, and comprehensive services. Nestled in the enchanting city of Qingdao within Shandong province, our expansive 42,000m² facility is equipped with cutting-edge workshops and advanced manufacturing machinery. As a distinguished high-tech enterprise, we boast exclusive intellectual property rights and harness global management and production expertise to drive our success. Our dynamic team comprises over 150 professionals, with 15% devoted to research and development and 30% possessing advanced academic degrees. Upholding a steadfast commitment to excellence and innovation, we manufacture superior valves that are indispensable in the petrochemical, oil, and coal chemical sectors. Our remarkable sales revenue soared to nearly 100 billion in 2017, marking a milestone in our journey toward industry leadership.
SNT stands proudly with the esteemed TS special equipment manufacturing certificate and ISO 9001 accreditation, serving as a testament to our unwavering commitment to quality. Our net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM highlight our credentials and credibility. Our portfolio showcases a myriad of national patents across diverse technologies. We specialize in designing and manufacturing an extensive range of valves, adhering to renowned standards such as ANSI, API, DIN, BS, and JIS. By fusing the finest elements of global valve designs with our innovative R&D, we provide an impressive variety of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our outstanding product spectrum also encompasses T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, and Self-operated Control Valves, among others. We offer diverse actuation methods, including manual, power-driven, pneumatic, and hydraulic operations. The main component materials comprise A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications cover sizes from 1/2" to 120", with working pressures ranging from ANSI 150# to 2500#, and operational temperatures spanning from -196ºC to 1100ºC, catering to a wide array of industrial requirements.
Leveraging advanced production technologies and a robust quality assurance framework, SNT valves are pivotal to sectors including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious client roster features renowned entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and others, underscoring our prominence and trust in the industry.
Dedicated to optimizing customer profitability, we are unwavering in our commitment to establishing unparalleled quality standards and a reputable brand identity. Our extensive quality assurance and after-sales service systems are meticulously crafted to ensure that SNT valves forge successful and enduring partnerships with our esteemed clientele.