- 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 |

Our cutting-edge ball valves feature a robust and resilient design, with both the ball and seat meticulously hard-coated using premium chrome carbide or tungsten carbide. This ensures superior resistance to erosion and abrasion, guaranteeing long-lasting durability and performance in challenging environments.
At SNT Machinery, we harness the power of the advanced HVOF coating system to deliver an unmatched sealing solution. Our proprietary mate-lapping technique ensures a flawless 100% seal, while our innovative live loading mechanism eliminates emissions entirely. By keeping the ball in constant contact with the seat, our design effectively wipes away contaminants, enabling self-cleaning properties that prevent interference and potential damage. These features make our valves exceptionally suited for both slurry and abrasive services, providing reliable and efficient operation.
SNT Ball Valves are meticulously engineered to align with a broad spectrum of international standards such as ASME B 16.34-2009, ASME B16.10-2000, and API 589-2009, among others. This versatile series of products finds wide-ranging applications across industries including petroleum, chemicals, light industries, pharmaceuticals, paper manufacturing, metallurgy, and power stations.
They possess the following remarkable characteristics:
The simplistic design ensures rapid disassembly for efficient maintenance.
With our commitment to periodic upkeep, SNT ball valves are crafted for effortless maintenance, featuring a non-tight fit design that significantly reduces servicing time.
Our advanced sealing technology ensures optimal security and reliability.
The innovative multi-layer sealing of both stem and body offers enhanced double protection through the synergy of O-ring and graphite or PTFE materials.
This design rigorously complies with international standards such as TA-Luft and Shell SPE 77/312, ensuring unparalleled safety and performance.
Extended Service Life for Superior Cost-Effectiveness
Our metal-sealed ball valves leverage cutting-edge processing techniques such as spray welding, thermal spraying, and fusion welding for the ball and seat ring, achieving an impressive hardness range of HRC58-73 and a binding force of 80-40MPa. This ensures over 100,000 on-off cycles with a leakage rating of ANSI VI.


Our Modular Design Offers Unparalleled Convenience
The modular inner sealing design allows for seamless interchangeability between soft and metal seats, ensuring adaptability and efficiency.
Diverse Connection Types for Enhanced Usability
The valves come with various connection types, including flanged (RF, FF, FM, G, RJ), threaded, and BW types, widely recognized internationally, facilitating convenient use and installation.
Extensive Application Experience Guarantees Reliability
SNT Valves are extensively utilized across petroleum, chemical, light industries, pharmaceuticals, paper manufacturing, metallurgy, and power stations. Renowned for our market reputation, we deliver tailored solutions based on specific service conditions, ensuring reliability and excellence in every application.


This innovative packing combination is meticulously crafted to satisfy transmission requirements of 100 ppm. It also ingeniously minimizes friction at the stem by an impressive 20%, enhancing efficiency and longevity.
2. The advanced wave spring and dual-scraper seat ring construction is designed to expertly cleanse the ball surface, maintaining pristine sealing conditions.
3. Our dual-sealing technology expertly ensures superior leakage prevention by ingeniously isolating the flow from contacting the spring, guaranteeing high integrity.
4. Enjoy unmatched stability and reliability with our soft seat, whose sealing performance is robustly dependable in every application.
5. With a sophisticated draining and sweeping design, our valves are adept at preventing any jamming, making cleaning effortless and efficient.
6. Our product proudly adheres to the rigorous API 607 standards, offering advanced fire-proof and anti-static functionalities for ultimate safety and compliance.











SNT Machinery (Qingdao) Co., Ltd. is a pioneering leader in the production of control valves, seamlessly integrating manufacturing, design, sales, and service under one roof. With our high starting point and rapid development, SNT is proudly situated in the vibrant city of Qingdao, Shandong province, sprawling across a vast area of 42,000 square meters. The facility is equipped with cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise, we boast independent intellectual property rights and have imported advanced management practices and production techniques. Our dedicated team is composed of over 150 employees, with 15% specializing in research and development, and 30% holding graduate or higher degrees. Leveraging our exceptional production management team and innovative technology, we produce a significant volume of premium quality valves, primarily serving the petrochemical, oil, and coal chemical industries. Our remarkable achievement includes reaching nearly 100 billion in sales value in 2017.
SNT has proudly secured the TS special equipment manufacturing certificate and ISO 9001 accreditation. We have also attained the network qualification certificates from industry giants like SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our commitment to innovation is reflected in the numerous national patents we've acquired across various technologies. We are proficient in designing and manufacturing a comprehensive range of valves, adhering to ANSI, API, DIN, BS, and JIS standards. By harnessing the best features from renowned valve designs across the globe and pairing them with our independent R&D, we are adept at crafting a wide array of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, Eccentric Rotary Valves, and T Three-eccentric Center Butterfly Valves.
Our diverse portfolio also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and Cryogenic Valves. These valves are available in various driving forms such as manual operation, power-driven, pneumatic, and hydraulic drive. The primary materials used in our valves include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, etc. Our specifications range from 1/2" to 120", with a working pressure of ANSI 150# to 2500#, and the capability to operate in temperatures spanning from -196ºC to 1100ºC.
Thanks to our advanced production technology, robust management, and unwavering quality assurance system, SNT valves are extensively utilized across various industries including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele comprises esteemed names such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and Jinan branch, among others.
At SNT, we prioritize our users' profitability, dedicating ourselves to creating unparalleled quality and establishing a reputable brand. Our impeccable quality assurance and comprehensive after-sales systems ensure that SNT valves forge prosperous partnerships with our esteemed clientele, driving mutual success and growth.