- 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 |

Engineered with unparalleled precision, the ball and seat components of these valves feature advanced hard coatings of chrome carbide or tungsten carbide. This robust reinforcement offers extraordinary resistance to both erosion and abrasion, significantly extending the lifespan and reliability of the valves even in the harshest conditions.
The SNT High Performance Soft Seated Ball Valves are equipped with a state-of-the-art HVOF coating system. Every valve undergoes meticulous mate-lapping using proprietary techniques to ensure perfect 100% sealing. The innovative live loading feature not only guarantees zero emissions but also keeps the ball in continuous contact with the seat, efficiently wiping away contaminants. This advanced self-cleaning mechanism prevents particle interference and damage, making these valves an ideal choice for slurry and abrasive service environments.









Our state-of-the-art anti-blowout design ensures the stem remains securely in place, preventing potential damage with unparalleled safety.
The sophisticated seat ring structure, equipped with a wave spring and dual-scraper, effortlessly cleans the ball surface, maintaining impeccable sealing integrity.
Advanced dual-sealing technology ensures unmatched leakage prevention by ingeniously isolating the spring from any flow contact.
Ingeniously designed draining and sweeping features work harmoniously to prevent jamming, ensuring the valve remains clean and fully functional.
Engineered in compliance with API 607 standards, these valves boast exceptional fireproof and anti-static properties.

Their Outstanding Features Include:
Elegant and efficient design for hassle-free disassembly.
Purposefully designed with user-friendly maintenance in mind, our ball valves boast a non-tight fit design, allowing for swift and easy servicing. This feature significantly reduces downtime during scheduled maintenance, ensuring smooth operation.
State-of-the-art sealing technology for unparalleled safety and assurance.
The robust multi-layer sealing of both stem and body provides dual-layer protection via an innovative combination of O-ring and graphite or PTFE, delivering outstanding sealing prowess.
This cutting-edge design adheres to the stringent standards of TA-Luft/Shell SPE 77/312, ensuring maximum compliance.
Extended Service Life for Superior Cost-Efficiency
Our metal seated ball valves are subjected to sophisticated processing methods such as spray welding, high-precision spraying, and advanced fusion welding. This process guarantees an exceptional hardness range of HRC58-73 and a robust binding force of 80-40MPa. With an extraordinary operational cycle lifespan surpassing 100,000 operations and an exceptional leakage class of ANSI VI, they offer unrivaled durability and cost-effectiveness.
Modular Design for Enhanced Convenience
The ingeniously modular inner sealing design permits effortless interchangeability between soft and metal seats, providing unmatched flexibility and reliability tailored to your needs.
Varied Connection Types for User Convenience
Our valves come with a variety of connection options, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW. Each type is meticulously compliant with international standards, ensuring seamless, user-friendly integration for your convenience.
Extensive Application Experience Guarantees Reliability
SNT Valves have cultivated an impeccable reputation, achieved through extensive deployment in petroleum, chemical processing, light industry, pharmaceuticals, paper production, metallurgy, and power stations. We provide optimal solutions that are precisely tailored to specific service conditions, guaranteeing unrivaled market-leading reliability.








SNT Machinery (Qingdao) Co., Ltd. stands at the forefront of control valve manufacturing, seamlessly integrating production, design, sales, and service. Nestled in the scenic beauty of Qingdao, Shandong province, our expansive 42,000m² facility is a testament to innovation, equipped with modern workshops and cutting-edge production machinery. As a distinguished high-tech enterprise, we pride ourselves on holding exclusive intellectual property rights and mastering global management and production expertise. Our dynamic team, comprising over 150 skilled employees, includes a dedicated 15% focused on R&D and an impressive 30% with advanced degrees. Embodying a commitment to excellence and pioneering innovation, we deliver superior quality valves extensively utilized in petrochemical, oil, and coal chemical sectors. Our remarkable sales revenue soared to nearly 100 billion in 2017, underscoring our industry leadership.
SNT proudly bears the esteemed TS special equipment manufacturing certificate and ISO 9001 accreditation, alongside net qualification certifications from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our impressive portfolio is enriched with numerous national patents across diverse technologies. Our expertise encompasses the design and manufacture of a comprehensive valve range, adhering to ANSI, API, DIN, BS, and JIS standards. By integrating the finest attributes of globally renowned valves with proprietary R&D, we offer an extensive array of valves including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves, setting industry benchmarks.
Our exceptional 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, and Self-operated Control Valves, among others. We provide versatile driving forms including manual, power-driven, pneumatic, and hydraulic operations. Our main component materials, such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, ensure unparalleled quality and durability. With specifications ranging from 1/2" to 120" in size, working pressures from ANSI 150# to 2500#, and operational temperatures from -196ºC to 1100ºC, we cater to diverse industry needs with precision.
Harnessing advanced production technology and a robust quality assurance system, SNT valves are pivotal across industries such as petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele, featuring illustrious enterprises such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, and SINOPEC Changling branch, attests to the reliability and excellence of our products.
With a steadfast focus on amplifying customer profitability, we are resolutely committed to establishing unparalleled quality standards and a prestigious brand reputation. Our comprehensive quality assurance and after-sales service systems ensure that SNT valves forge thriving partnerships with our valued clients, fostering mutual success and growth.