- 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, the ball and seat of these valves are enhanced with cutting-edge hard coatings of either chrome carbide or tungsten carbide. This superior enhancement provides exceptional resistance to erosion and abrasion, significantly improving the longevity and reliability of the valves.
Our SNT High Performance Soft Seated Ball Valves feature a state-of-the-art HVOF coating system for ultimate durability. Each valve undergoes precise mate-lapping using proprietary techniques to ensure a flawless 100% sealing. The innovative live loading feature assures zero emissions while maintaining the ball's constant contact with the seat, effectively wiping away contaminants. This groundbreaking self-cleaning mechanism prevents particle interference and damage, making these valves the ideal choice for slurry and abrasive service applications.









Engineered with an anti-blow out design, this feature acts as a safeguard, effectively preventing the stem from blowing out and ensuring the integrity of the casing is maintained.
The innovative seat ring structure, featuring a wave spring and dual-scraper design, diligently cleans the ball surface and maintains optimal sealing capabilities.
Our superior dual-sealing ensures an unparalleled leakage class by ingeniously preventing the flow from contacting the spring, thereby safeguarding efficiency.
Ingeniously designed with draining and sweeping capabilities, our valves prevent jamming by effectively cleaning away debris.
Firmly adhering to API 607 standards, our product boasts robust fire-proof and anti-static features that guarantee enhanced safety and reliability.

Their Outstanding Features Include:
Streamlined design allowing for effortless and intuitive disassembly.
Crafted with the utmost simplicity in maintenance, our ball valves boast a non-tight fit design that facilitates swift servicing. This significantly reduces downtime during routine maintenance, ensuring operational continuity.
Pioneering sealing technology ensures maximum security and reliability.
The innovative multi-layer sealing of the stem and body offers dual protection via an advanced combination of O-ring and graphite or PTFE, achieving outstanding and uncompromised sealing performance.
This cutting-edge design adheres to the stringent TA-Luft/Shell SPE 77/312 standards, exemplifying our commitment to excellence.
Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves undergo sophisticated processing techniques such as spray welding, spraying, and fusion welding. This ensures a hardness range of HRC58-73 and a binding force of 80-40MPa, boasting an extraordinary on-off cycle lifespan that exceeds 100,000 operations, coupled with a leakage class of ANSI VI.
Modular Design for Enhanced Convenience
The modular inner sealing design offers the ease of interchangeability between soft and metal seats, assuring unparalleled flexibility and steadfast reliability.
Varied Connection Types for User Convenience
Our valves are available with diverse connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. Each type aligns with international standards, ensuring seamless integration and user-friendly application.
Extensive Application Experience Guarantees Reliability
SNT Valves have built an enviable reputation through their extensive deployment across sectors such as petroleum, chemical industry, light industry, pharmaceuticals, paper-making, metallurgy, and power stations. We provide optimal solutions meticulously tailored to specific service conditions, ensuring industry-leading reliability and trust.








SNT Machinery(Qingdao) Co., Ltd stands as a leading force in the world of control valves, skillfully integrating production, design, sales, and service into one seamless operation. Nestled in the picturesque city of Qingdao, Shandong Province, our expansive facility stretches over a remarkable 42,000m², equipped with cutting-edge workshops and superlative production technology. As a high-tech enterprise, we proudly possess exclusive intellectual property rights and are empowered by a wealth of international management and production expertise. Our dynamic team of over 150 professionals includes 15% focused on Research & Development, coupled with 30% holding advanced degrees, all united in our quest for innovation and excellence. Our top-tier valves are the choice of the petrochemical, oil, and coal chemical sectors, contributing significantly to our impressive 2017 sales revenue that soared to nearly 100 billion.
SNT is honored to hold the distinguished TS special equipment manufacturing certificate and ISO 9001 accreditation, a testament to our commitment to excellence. Our prestigious net qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM are complemented by our extensive portfolio of national patents in diverse technologies. Our expertise shines in the design and manufacture of a broad spectrum of valves conforming to ANSI, API, DIN, BS, and JIS standards. By harmoniously blending premier global valve features with our proprietary R&D advancements, we proudly offer a comprehensive selection of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our impressive array of products further includes 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 a diverse range of driving mechanisms such as manual, power-driven, pneumatic, and hydraulic operations. The main component materials include A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M. Our specifications range from 1/2" to 120" in size, accommodating working pressures from ANSI 150# to 2500#, and operational temperatures from -196ºC to 1100ºC.
Harnessing advanced production techniques and a robust quality assurance framework, SNT valves play a pivotal role across a multitude of industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele features illustrious names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and many more.
With an unwavering focus on amplifying customer profitability, we are dedicated to establishing an unparalleled standard of quality and a reputable brand presence. Our extensive quality assurance and after-sales service systems ensure that SNT valves not only meet but exceed expectations, forging prosperous partnerships with our valued clients.