- 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 |

Featuring a robust construction, the ball and seat of these valves are fortified with either chrome carbide or tungsten carbide coatings. This advanced hard coating technology endows the valves with exceptional resistance to erosion and abrasion, ensuring long-lasting durability even in the harshest conditions.
SNT Machinery employs a state-of-the-art HVOF coating system, complemented by our proprietary mate-lapping technique, to achieve unparalleled sealing integrity. Our innovative live-loading mechanism not only ensures zero emissions but also maintains a perfect seal. The ball remains firmly seated, effectively wiping away contaminants and executing a self-cleaning action that safeguards against potential damage. This makes our valves exceptionally well-suited for both slurry and abrasive service applications, delivering reliable performance and protection where it counts most.








They boast the following features:
A straightforward design allows for quick and easy disassembly, enhancing operational efficiency.
Our ball valves, designed for periodic maintenance, feature a non-tight fit design that simplifies upkeep and significantly reduces service time.
State-of-the-art sealing technology ensures utmost security.
The multi-layer sealing system, comprising a combination of O-ring and either graphite or PTFE, provides dual sealing for the stem and body, enhancing durability.
This innovative design complies with TA-Luft/Shell SPE 77/312 standards, guaranteeing performance excellence.
Extended service life delivers exceptional cost-effectiveness.
For metal-sealed ball valves, cutting-edge processes like spray welding, spraying, and fusion welding ensure the ball and seat ring achieve a hardness of HRC58-73 and a binding force of 80-40MPa. With over 100,000 on-off cycles, they meet the stringent ANSI VI leakage class.
Modular design provides unparalleled flexibility.
The modular inner sealing design enables interchangeability between soft and metal seats, enhancing adaptability.
Diverse connection types for user-friendly operation.
Offering multiple connection types including flanged (RF, FF, FM, G, RJ), screw-threaded, and BW types, these valves meet international standards for convenient and adaptable use.
Extensive industry experience underscores reliability.
With widespread use in sectors such as petroleum, chemical, light industry, pharmaceuticals, paper-making, metallurgy, and power stations, SNT Valve has earned a stellar market reputation. We provide optimal solutions tailored to service conditions, ensuring reliability and satisfaction.
The innovative packing combination is engineered to meet stringent emissions requirements, achieving a remarkable 100 ppm while simultaneously reducing friction on the stem by an impressive 20%.
2. The cutting-edge seat ring structure, featuring a wave spring and dual-scraper mechanism, is adept at maintaining a pristine ball surface, ensuring a consistently reliable seal.
3. Our advanced dual-sealing system is a hallmark of excellence, ensuring the highest leakage class by expertly preventing flow from contacting the spring, thereby guaranteeing optimal performance.
4. Experience unmatched stability and reliability with the sealing performance of our soft seat, designed to perform impeccably under various conditions.
5. The thoughtfully designed draining and sweeping features prevent any potential jamming, ensuring continuous operation by effectively cleaning the valve.
6. Built in compliance with API 607 standards, our valve embodies both fire-proof and anti-static capabilities, offering peace of mind and robust protection in demanding environments.









SNT Machinery (Qingdao) Co., Ltd. stands as a distinguished producer of control valves, seamlessly integrating manufacturing, design, sales, and services. With a robust foundation and rapid growth trajectory, SNT is strategically positioned in Qingdao, Shandong province, sprawling over 42,000 square meters, and equipped with state-of-the-art workshops and production facilities. As a high-tech enterprise, SNT prides itself on possessing independent intellectual property rights and adopting cutting-edge management and production practices from global leaders. Our dynamic team consists of over 150 skilled professionals, with R&D specialists comprising 15% and individuals with graduate or higher degrees making up 30%. Fueled by a top-tier production management team and pioneering research and development, SNT excels in producing large volumes of superior quality valves for the petrochemical, oil, and coal chemical industries, achieving a sales revenue nearing 100 billion in 2017.
SNT proudly holds the prestigious TS special equipment manufacturing certificate and ISO 9001 certification, reflecting our commitment to excellence. We've also secured net qualification certificates with industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM, alongside numerous national patents for our innovative technologies. Our expertise extends to designing and manufacturing an expansive array of valves compliant with ANSI, API, DIN, BS, and JIS standards. By harnessing the strengths of renowned valve brands worldwide and leveraging our independent R&D capabilities, we offer a comprehensive range of valves, including GLOBE, High-Pressure Boiler Blow-Down Valves, High-Performance Butterfly Valves, Angle-Regulating Valves, and Eccentric Rotary Valves.
Our extensive product lineup further encompasses V Ball Valves, High Wear-Resistant Ball Valves, High Pressure Steam Valves, Micro-Flow Control Valves, Self-Operated Control Valves, and Cryogenic Valves. Our versatile driving forms include manual, power-driven, pneumatic, and hydraulic options. Crafted from premium materials such as A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, our valves meet specifications ranging from 1/2" to 120", with operational pressures from ANSI 150# to 2500# and working temperatures spanning -196ºC to 1100ºC.
Leveraging advanced production technology and a robust quality assurance system, SNT valves have secured their place across a spectrum of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power generation sectors. Our esteemed clientele features SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, Jinan branch, and numerous other industry pioneers.
At SNT, our customer's success is our highest priority. We are committed to building an exceptional quality brand, supported by a flawless quality assurance and customer service framework. This dedication ensures that SNT valves consistently align with our customers, fostering mutual growth and shared prosperity.