- 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 |

The ball and seat of these valves are meticulously hard-coated with either premium chrome carbide or tungsten carbide, offering remarkable resistance to erosion and abrasion. This double-layer of protection ensures longevity and durability in demanding environments.
At SNT Machinery (Qingdao) Co., Ltd., we employ the advanced HVOF coating system to achieve superior surface finishes. Our proprietary mate-lapping process guarantees impeccable 100% sealing, while live loading ensures zero emissions for utmost safety. Ingeniously designed, the ball maintains constant contact with the seat, effectively wiping away any contaminants. This self-cleaning mechanism prevents interference and damage from debris, making the valve ideally suited for slurry and abrasive service applications.








Our valves boast the following distinctive characteristics:
Ingeniously simple structure ensures rapid disassembly.
Thanks to regular maintenance protocols, our ball valves are designed with a non-tight fit feature that simplifies servicing, significantly reducing maintenance time and enhancing efficiency.
State-of-the-art sealing technology ensures unparalleled security.
The combination of a multi-layer sealing system, incorporating O-rings and either graphite or PTFE, provides a robust dual-sealing solution between stem and body, enhancing secure operations.
This innovative design complies with stringent TA-Luft/Shell SPE 77/312 standards.
Durable design for cost-effective, long-term operation.
For our metal-sealed ball valves, advanced processes like spray welding, spraying, and fusion welding are employed on the ball and seat ring. This ensures hardness levels from HRC58 to HRC73, binding forces from 80-40MPa, and more than 100,000 on-off cycles with leakage class conforming to ANSI VI standards.
Modular design enhances convenience and adaptability.
The innovative modular design of the inner sealing system allows for the interchangeability of soft and metal seats, ensuring versatile adaptability to your needs.
Diverse connection options provide effortless adaptability.
Our connection types, including flanged (RF, FF, FM, G, RJ), screw-thread, and BW types, are globally standardized, offering exceptional ease of use and adaptability to various systems.
Extensive practical experience ensures unwavering reliability.
SNT Valves have earned a stellar reputation across a broad spectrum of industries, such as petroleum, chemical, light industries, pharmaceuticals, paper-making, metallurgy, and power stations. Our solutions are tailored to meet specific service conditions, ensuring reliability and trustworthiness in every application.
Innovative packing combinations are designed to meet stringent emission requirements of 100 ppm, while simultaneously reducing friction by an impressive 20%, enhancing the longevity and efficiency of the stem.
2. Featuring a seat ring structure with wave springs and dual-scraper technology, this design effectively cleans the ball surface, maintaining optimal sealing integrity at all times.
3. The dual-sealing mechanism ensures superior leakage class standards, cleverly engineered so that the flow never contacts the spring, preserving its efficacy.
4. The soft seat's sealing performance is remarkably stable and reliable, providing consistent and dependable sealing capability.
5. Our innovative draining and sweeping design actively prevents blockages, ensuring the valve remains free from jams and operates smoothly.
6. Rigorously compliant with API 607 standards, this valve offers enhanced fire-proof and anti-static capabilities, ensuring safety and reliability in all conditions.









SNT Machinery (Qingdao) Co., Ltd is a distinguished producer of control valves, seamlessly integrating manufacturing, designing, sales, and services into one robust entity. With a strategic high starting point and rapid development, SNT is ideally situated in Qingdao, Shandong province, sprawling over a vast area of 42,000 square meters. Our facilities are outfitted with cutting-edge workshops and state-of-the-art production equipment. As a high-tech enterprise boasting independent intellectual property rights, we leverage imported advanced management and production methodologies. Our dynamic team consists of over 150 dedicated professionals, with R&D specialists making up 15% and graduates or higher degree holders comprising 30% of our workforce. Anchored by a top-tier production management team and pioneering technology research and development, we consistently deliver large volumes of superior quality valves. These are utilized extensively in the petrochemical, oil, and coal chemical sectors, achieving a remarkable sales value nearing 100 billion in 2017.
SNT proudly holds the TS special equipment manufacturing certificate and ISO 9001 accreditation. Additionally, we have secured the esteemed net qualification certificate from SINOPEC, CNOOC, PETROCHINA, and SINOCHEM. Our innovative prowess is further evidenced by our numerous National Patents. We possess the capability to design and manufacture a comprehensive range of valves adhering to ANSI, API, DIN, BS, and JIS standards. By amalgamating the strengths of renowned global valves and our own independent research and development, we have mastered the production of various valve types, including GLOBE valves, 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 array of valve offerings also features V Ball Valves, High Wear-resistant Ball Valves, High Pressure Steam Valves, Micro-flow Control Valves, Self-operated Control Valves, and specialized Cryogenic Valves. Our driving mechanisms encompass manual operation, power-driven, pneumatic, and hydraulic drives. The primary materials for our products include A216WCB, A217 WC6/WC9, A351 CF8/CF8M/CF3/CF3M, among others. We cater to specifications ranging from 1/2" to an impressive 120", accommodating working pressures of ANSI 150# to 2500#, and operational temperatures from -196ºC to 1100ºC.
Leveraging advanced production technology management and a comprehensive quality assurance system, SNT Valves have been extensively adopted across diverse industries, including petrochemical, oil, steel & iron, paper manufacturing, and power stations. Our esteemed clientele comprises industry giants such as SINOPEC QILU branch, SINOPEC Qingdao branch, CNOOC Huizhou Refinery, PETROCHINA Guangxi branch, PETROCHINA Ningxia branch, SINOPEC Qingdao Refinery, and various other notable branches, reflecting our expansive reach and trusted partnerships.
At SNT, we prioritize our users' profitability, passionately dedicating ourselves to crafting excellent quality and establishing a revered brand presence. Our impeccable quality assurance and comprehensive after-sales systems are the foundation upon which we build enduring collaborations with our customers, driving mutual growth and shared prosperity.