Say Goodbye To Leakage And Jamming! The DN Flange Rotary Joint Makes Rigid Pipes Move.

Let's talk about a problem that troubles many equipment managers - rigid pipes need to be connected with movable parts, but they soon start to leak and get stuck. What should we do? If you have also encountered such a situation, then this article today is written especially for you.

Many customers have complained to us: "The swivel union was installed perfectly, but it started leaking after just a few months of use?" "It got stuck while rotating, and the machine couldn't move!" After our analysis, the problems mostly lie in three aspects: First, the concentricity is insufficient. The hollow shaft of the swivel union does not align with the rotating body it is paired with, and the sealing surfaces do not fit properly, causing the medium to leak through the gaps. Second, the sealing components are not up to standard. Low-quality sealing components have poor wear resistance and insufficient temperature resistance, and they fail quickly in high temperatures or in corrosive media. Third, impurities invade. Rust, scale, and debris in the pipeline enter the joint, scratching the sealing surface and blocking the bearings. In mild cases, there is leakage; in severe cases, it directly gets stuck. To put it simply, leakage and jamming are essentially "complications" resulting from improper product design, material selection, and manufacturing processes.

The DN flange swivel union, also known as a swivel joint or swing-type joint, is a product specifically designed for the dynamic connection of fluid media between rigid pipes, functioning as a reciprocating or low-speed rotating motion. Its original design concept can be summed up in one sentence: to make the rigid pipes "move", while ensuring "no leakage". The internal part is supported by high-precision bearings, and is combined with imported sealing components. From the structural perspective, this lays a solid foundation for solving leakage and jamming problems.

Why can it avoid leakage and jamming? Firstly, the high-precision bearings provide stable and smooth operation without any jamming. The DN flange rotary joint is equipped with double rows of wide deep groove ball bearings inside, and is pre-filled with imported lubricating grease. It can last for 3 to 5 years without maintenance. The two rows of precision-grade steel balls support the operation, ensuring smooth and stable movement, regardless of reciprocating motion or low-speed rotation, always flexible and smooth. Secondly, the imported seals ensure reliable sealing without leakage. The sealing performance is the lifeline of the rotary joint. We use high-quality seals, made of high-quality materials that are wear-resistant, temperature-resistant, and corrosion-resistant. With reliable sealing, leakage naturally disappears.

Thirdly, the flange connection is firm and stable, resisting stress effectively. The flange connection not only facilitates installation and disassembly but also can effectively withstand pipeline stress. Rigid pipes generate huge stress during thermal expansion and contraction or when equipment vibrates. The DN rotary joint with flange connection is stable and steadfast, remaining motionless as a mountain. Fourthly, the materials are diverse, suitable for various harsh media. Depending on the working conditions, carbon steel, stainless steel (304, 316L) and other materials can be selected. It can transport various media such as water, air, hydraulic oil, coolant, steam, hot oil, and chemical products. The stainless steel material is more resistant to corrosion and acid and alkali, and can handle seawater, sewage, and chemical raw materials with ease. No matter how "difficult" the medium is, we have ways to deal with it.

Swivel union can be connected by flange, thread or welding. The shell material is carbon steel or stainless steel. Customization is available beyond the standard parameters. In terms of applications, DN flange rotary joints are widely used in industries such as metallurgy, mining, building materials, chemical engineering, mechanical processing, petrochemicals, ships, papermaking, etc. For example, they are used in continuous casting machine roller cooling, reaction tank connection, paper machinery steam system, calendering machine, extruder, mining machinery, hydraulic system, power equipment cooling, environmental sedimentation tank, etc. It can be said that wherever there is a need for flexible connection, reciprocating swing or low-speed rotation between rigid pipes, DN flange rotary joints are reliable solutions.

Let me tell you: Choosing the right model is more important than anything else. The pipe diameter is selected based on the nominal diameter of the pipeline. The material is typically carbon steel, and stainless steel is selected for corrosive media. The seal is matched according to the temperature and pressure of the medium. During installation, please note: Clean the iron filings and impurities inside the pipeline before installation; When connecting with flanges, add a gasket (either copper or polytetrafluoroethylene) at the shaft end, align properly, and then tighten the bolts diagonally with consistent torque; Ensure that the joint is concentric with the equipment; For steam or heat transfer oil media, apply high-temperature sealing胶. At Shandong Focus Machinery Co.， Ltd.， we not only sell products but also provide "reliable usage" solutions - free technical consultation， non-standard customization services， and all products undergo strict testing before leaving the factory. Whether you are struggling with model selection or want to know the details， please feel free to contact us at any time. Because we are dedicated， we are reliable.