- 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 an extraordinary level of precision, the ball and seat of these valves are fortified with cutting-edge hard coatings, utilizing either chrome carbide or tungsten carbide. This advanced fortification ensures remarkable resistance to erosion and abrasion, thereby significantly enhancing the longevity and reliability of the valves.
Discover the SNT High Performance Soft Seated Ball Valves, featuring a revolutionary HVOF coating system. Each valve is subject to meticulous mate-lapping through proprietary techniques, ensuring a flawless 100% sealing capability. The innovative live loading functionality guarantees zero emissions. Additionally, the ball is engineered to maintain constant contact with the seat, effectively removing contaminants with its self-cleaning mechanism. This state-of-the-art design prevents interference and damage from particles, making these valves the ideal solution for slurry and abrasive service applications.









The robust anti-blow out design is specifically intended to prevent the stem from being expelled, effectively safeguarding against potential damage and enhancing overall product safety.
Featuring an advanced seat ring structure with a wave spring and dual-scraper, this design meticulously cleans the ball surface, thereby maintaining optimal sealing and ensuring long-lasting performance.
Our dual-sealing system is engineered to perfection, guaranteeing leakage class integrity by preventing flow from contacting the spring, ensuring reliability and peace of mind.
Ingeniously designed draining and sweeping functions prevent the valve from becoming jammed by effectively cleaning any potential blockages, promoting seamless operation.
Adhering to API 607 standards, our product boasts excellent fireproof and anti-static functions, ensuring safety and reliability even under extreme conditions.

Exceptional Design Features Include:
Streamlined design ensuring effortless disassembly and reassembly.
Our ball valves are engineered for ease of maintenance with a non-tight fit design that allows for rapid servicing, dramatically minimizing downtime during routine upkeep.
Innovative sealing technology delivering maximum security.
The multi-layer sealing system of both stem and body provides dual protection through a blend of O-ring and high-performance graphite or PTFE, guaranteeing outstanding sealing integrity.
This forward-thinking design adheres to the rigorous TA-Luft/Shell SPE 77/312 standards.
Extended Durability for Superior Cost-Efficiency
Our metal seated ball valves benefit from state-of-the-art processing techniques, including spray welding, spraying, and fusion welding. These processes ensure a hardness range of HRC58-73 and a binding force of 80-40MPa, with an impressive on-off cycle lifespan that exceeds 100,000 operations, achieving a leakage class of ANSI VI.
Modular Design for Extraordinary Flexibility
The modular internal sealing composition allows for seamless interchangeability between soft and metal seats, offering unparalleled flexibility and dependability.
Varied Connection Options for User-Friendly Experience
Our valves are engineered with a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. These options adhere to international standards, ensuring seamless and user-friendly integration.
Extensive Application Expertise Ensures Unmatched Reliability
SNT Valves have built a prestigious reputation through broad application in fields such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimal solutions custom-tailored to specific service conditions, guaranteeing market-leading reliability.








SNT Machinery (Qingdao) Co., Ltd stands as a beacon of innovation and excellence in the domain of control valves. As a premier manufacturer, we seamlessly integrate production, design, sales, and superior services. Nestled in the scenic beauty of Qingdao, Shandong province, our expansive facility covers 42,000m², equipped with cutting-edge workshops and state-of-the-art machinery. Recognized as a high-tech enterprise with exclusive intellectual property rights, we are fortified with world-class management and production prowess. Our dynamic team, comprising over 150 skilled professionals, includes 15% dedicated to research and development and 30% holding advanced degrees, propelling us towards excellence and innovation. We proudly manufacture top-tier valves extensively utilized in petrochemical, oil, and coal chemical industries. In 2017, our remarkable sales revenue approached a staggering 100 billion, marking our indelible presence in the sector.
SNT proudly carries the esteemed TS special equipment manufacturing certificate and the ISO 9001 accreditation, a testament to our unwavering commitment to quality. We've garnered net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio is adorned with numerous national patents, showcasing our prowess across diverse technologies. Our expertise encompasses the design and manufacture of a wide array of valves that conform to ANSI, API, DIN, BS, and JIS standards. By amalgamating the exceptional features of renowned global valves with our innovative R&D, we present a comprehensive range of valves, including GLOBE valves, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our extensive product range also features T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and more. We offer versatile driving forms including manual, power-driven, pneumatic, and hydraulic operations. The main component materials encompass A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, with working pressures from ANSI 150# to 2500#, and operational temperatures spanning -196ºC to 1100ºC, ensuring adaptability to diverse industrial needs.
Leveraging advanced production technology and a robust quality assurance system, SNT valves are indispensable to a variety of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele, featuring illustrious names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and many others, stands testament to our commitment to quality and reliability.
Our dedication to maximizing customer profitability is unwavering, as we strive to establish an extraordinary quality standard and a highly reputable brand. Our comprehensive quality assurance and after-sales service systems are designed to foster prosperous partnerships with all our valued clients, reinforcing SNT valves as a cornerstone of their operational success.