- 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 unmatched precision, the ball and seat of these superior valves are fortified with advanced coatings of chrome carbide or tungsten carbide. This exceptional strengthening process provides remarkable resistance to erosion and abrasion, significantly enhancing the lifespan and reliability of the valves.
Our SNT High Performance Soft Seated Ball Valves utilize a cutting-edge HVOF coating system. Every valve undergoes meticulous mate-lapping with proprietary techniques, ensuring flawless 100% sealing. The innovative live loading feature guarantees zero emissions, with the ball consistently engaging the seat to effectively remove contaminants. This state-of-the-art self-cleaning mechanism is adept at preventing interference and damage from particles, qualifying these valves as an exceptional choice for slurry and abrasive service applications.









Ingeniously crafted with an anti-blowout design, our product ensures that the stem remains securely in place, effectively preventing any damage that could be caused by blowouts.
The innovative seat ring structure, featuring a wave spring and dual-scraper, efficiently cleans the ball surface while maintaining impeccable sealing performance.
Our dual-sealing mechanism is engineered to perfection, ensuring top-notch leakage prevention by keeping the flow away from the spring, thereby guaranteeing superior leakage class.
Our advanced draining and sweeping design skillfully prevents the valve from becoming jammed, maintaining optimal cleanliness and functionality.
Meticulously designed to comply with API 607 standards, our valves boast fire-proof and anti-static features, ensuring safety and reliability in demanding environments.

Their Remarkable Features Include:
Effortless disassembly thanks to an elegantly streamlined design.
Engineered with a focus on easy maintenance, our ball valves boast a non-tight fit design that allows for rapid servicing, significantly reducing downtime during scheduled maintenance procedures.
Innovative sealing technology ensuring maximum security.
The multi-layer sealing system incorporating both O-ring and graphite or PTFE provides dual-level protection, delivering superior sealing efficacy.
This pioneering design rigorously meets the stringent TA-Luft/Shell SPE 77/312 standards.
Prolonged Service Life for Exceptional Cost-Efficiency
Our metal seated ball valves are subjected to sophisticated processing techniques like spray welding, spraying, and fusion welding. This guarantees a surface hardness between HRC58-73 and a robust binding strength of 80-40MPa, with an outstanding operational lifespan surpassing 100,000 on-off cycles and adhering to a leakage class of ANSI VI.
Modular Design for Elevated Convenience
The modular inner sealing design permits easy interchangeability between soft and metal seats, ensuring both flexibility and high reliability.
Diverse Connection Types for User Ease
Our valves come in a variety of connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW, all meeting international standards for seamless and user-friendly integration.
Vast Application Experience Ensures Dependability
SNT Valves have established a distinguished reputation through extensive use in petroleum, chemical processing, light manufacturing, pharmaceuticals, paper production, metallurgy, and power generation sectors. We offer optimal solutions tailored to precise service conditions, delivering leading-edge reliability.








SNT Machinery (Qingdao) Co., Ltd is not just a manufacturer; we are the epitome of excellence in control valve production. Nestled in the scenic and strategically significant Qingdao, Shandong province, our extensive facility covers an impressive 42,000m². It is equipped with state-of-the-art workshops and cutting-edge machinery to ensure unparalleled production capabilities. As a leading high-tech enterprise with exclusive intellectual property rights, we are at the forefront of global management and production expertise. Our dynamic team, consisting of over 150 dedicated professionals, boasts 15% in R&D and 30% with advanced degrees, fueling our commitment to innovation and quality. We specialize in crafting premium valves that find extensive applications across petrochemical, oil, and coal chemical industries. Remarkably, our sales revenue skyrocketed to nearly 100 billion in 2017, a testament to our industry leadership.
SNT proudly holds the esteemed TS special equipment manufacturing certificate and ISO 9001 accreditation. Our impeccable reputation is further endorsed by net qualification certificates from industry giants such as SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our portfolio of numerous national patents stands as a hallmark of our technological prowess. We excel in the design and manufacture of a comprehensive range of valves that conform to stringent international standards, including ANSI, API, DIN, BS, and JIS. By ingeniously integrating the finest features of world-renowned valves with our proprietary R&D, we now present an extensive selection of valves, including GLOBE, High Pressure Boiler Blow-down Valves, High-performance Butterfly Valves, Angle-regulating Valves, and Eccentric Rotary Valves.
Our extraordinary product lineup 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 offer diverse operation modes, including manual, power-driven, pneumatic, and hydraulic systems. The main component materials, such as A216WCB, A217 WC6/WC9, and A351 CF8/CF8M/CF3/CF3M, guarantee robust performance. Our range of specifications varies from 1/2" to 120" in size, supports working pressures from ANSI 150# to 2500#, and withstands operational temperatures ranging from -196ºC to 1100ºC, catering to a broad spectrum of industrial needs.
With advanced production technology and a comprehensive quality assurance system, SNT valves are indispensable to a wide array of industries, including petrochemical, oil, steel & iron, paper manufacturing, and power generation. Our prestigious clientele comprises leading entities such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Changling branch, and many other esteemed organizations. This esteemed list of clients underscores our commitment to excellence and reliability.
At SNT, our focus is unwavering: to maximize customer profitability through the establishment of exceptional quality standards and the cultivation of a reputable brand. Our comprehensive quality assurance and after-sales service systems ensure that every SNT valve lays the foundation for prosperous, long-lasting partnerships with our valued clients. We strive to exceed expectations, ensuring that our stakeholders experience unparalleled satisfaction and success.