- 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 |

Masterfully crafted with precision, the ball and seat of these valves are fortified with sophisticated hard coatings of chrome carbide or tungsten carbide. This remarkable enhancement ensures unparalleled resistance to both erosion and abrasion, significantly boosting the valves' longevity and reliability.
Our SNT High Performance Soft Seated Ball Valves feature a cutting-edge HVOF coating system. Each valve is meticulously mate-lapped using proprietary techniques to ensure a perfect 100% sealing capability. The advanced live loading feature guarantees zero emissions, while the ball consistently maintains contact with the seat, efficiently sweeping away contaminants. This innovative self-cleaning function prevents interference and damage from particles, making these valves an ideal choice for slurry and abrasive service applications.









Ingeniously designed with an anti-blowout feature, our product effectively prevents stem ejection, safeguarding against potential damage.
The seat ring structure, featuring a wave spring and dual-scraper design, expertly cleans the ball surface to maintain optimal sealing integrity.
Our dual-sealing technology guarantees superior leak prevention by ensuring that the flow remains isolated from the spring, achieving excellent leakage class.
Our advanced draining and sweeping design effectively prevents the valve from jamming, maintaining cleanliness and operational efficiency.
Fully compliant with API 607 standards, our product boasts robust fire-proof and anti-static capabilities, ensuring unmatched safety and reliability.

Their Remarkable Features Include:
Effortless disassembly enabled by an elegantly streamlined design.
Purposefully crafted for ease of maintenance, our ball valves boast a non-tight fit design, ensuring swift servicing and reducing downtime during routine maintenance sessions.
Revolutionary sealing technology ensuring utmost security.
The advanced multi-layer sealing system of the stem and body provides dual protection utilizing a combination of O-ring and graphite or PTFE, delivering unparalleled sealing performance.
This groundbreaking design is compliant with the stringent TA-Luft/Shell SPE 77/312 standards.
Prolonged Service Life for Exceptional Cost-Efficiency
Our metal seated ball valves are subjected to state-of-the-art processing methods, including spray welding, spraying, and fusion welding. This ensures a hardness range of HRC58-73 with a binding force of 80-40MPa, boasting an exceptional on-off cycle lifespan exceeding 100,000 operations, and achieving a leakage class of ANSI VI.
Modular Design Elevating User Convenience
The modular inner sealing design facilitates effortless interchangeability between soft and metal seats, providing adaptability and assured reliability.
Versatile Connection Types for Enhanced User Experience
Our valves are designed for diverse connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all adhering to international standards, delivering seamless and user-friendly integration.
Proven Application Experience Ensures Unwavering Reliability
SNT Valves have built a formidable reputation through extensive deployment in petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimized solutions customized to specific service conditions, guaranteeing market-leading reliability.








SNT Machinery(Qingdao) Co., Ltd stands as a beacon of excellence in the manufacture of control valves. Our company perfectly marries production, design, sales, and exceptional services under one spacious roof. Nestled in the breathtaking locale of Qingdao, Shandong province, our sprawling 42,000m² facility is a hub of innovation, equipped with state-of-the-art workshops and groundbreaking production machinery. As a trailblazing high-tech enterprise, we possess unparalleled intellectual property rights and an elite management and production skill set that is recognized worldwide. Our dynamic team, over 150 strong, includes 15% focused on pioneering R&D and an impressive 30% with advanced degrees. Our relentless dedication to perfection and innovation results in premium-quality valves that are the backbone of industries such as petrochemicals, oil, and coal chemicals. In a testament to our success, our sales revenue reached an extraordinary near 100 billion in 2017.
SNT is proud to be a bearer of the esteemed TS special equipment manufacturing certificate and the ISO 9001 accreditation. Our net qualification is endorsed by industry powerhouses including SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our rich portfolio is reinforced by numerous national patents covering a broad spectrum of technologies. Our prowess extends to the design and production of a diverse range of valves, all adhering to global standards like ANSI, API, DIN, BS, and JIS. By infusing the best attributes of world-renowned valves with our cutting-edge R&D, we now offer a vast selection of valves. These include sophisticated GLOBE valves, robust High Pressure Boiler Blow-down Valves, cutting-edge High-performance Butterfly Valves, precise Angle-regulating Valves, and innovative Eccentric Rotary Valves.
Our remarkable array of products further encompasses T Three-eccentric Center Butterfly Valves, V Ball Valves, High Wear-resistant Ball Valves, and High Pressure Steam Valves, along with Micro-flow Control Valves and Self-operated Control Valves. Our offerings are equipped with numerous driving forms such as manual, power-driven, pneumatic, and hydraulic operation to suit various needs. The main components are crafted from premium materials like A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our products boast specifications ranging from 1/2" to 120" in size, can withstand pressures from ANSI 150# to 2500#, and operate in temperatures ranging from a frigid -196ºC to a scorching 1100ºC.
Harnessing advanced production technology and a comprehensive quality assurance system, SNT valves are indispensable across a wide range of industries including petrochemicals, oil, steel & iron, paper manufacturing, and power stations. Our prestigious clientele features illustrious entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, among many more.
Driven by a commitment to optimizing customer profitability, we are devoted to setting an unmatched quality benchmark and establishing a brand synonymous with reliability and excellence. Our comprehensive quality assurance and unparalleled after-sales service systems ensure that SNT valves are more than mere products-they are the foundation of fruitful collaborations with our valued clients.