Why has the hydrophobicity issue plagued many companies for so long?

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This post was last edited by Fulei on 2023-7-4 10:47. Why does the problem of hydrophobicity continue to plague many companies? In steam systems, hydrophobic devices serve to remove water, prevent steam from entering, and discharge air. The hydrophobicity level affects steam consumption, equipment efficiency and lifespan, as well as the quality of the products produced. For a long time, the problem of steam system water separation has plagued numerous steam users, with industrial enterprises that consume large amounts of steam in their production processes suffering the most from it. Although every company has never stopped seeking solutions, very few actually succeed in solving their problems. What exactly is the reason for this? Today, drawing on years of market research and hands-on practical experience, Fred discusses and shares with everyone the underlying reasons for this. Principles and Classification: Based on their working principles, steam traps are mainly divided into three categories: thermodynamic, thermostatic, and mechanical. Each major category is further divided into various subcategories based on factors such as moving parts, materials, hydrophobic temperature, and hydrophobic channels. Different steam traps are suitable for different applications, and none of them is universal. This requires that, when selecting a steam trap, one must understand the working principles and operating mechanisms of various types of steam traps, as well as be able to correctly distinguish between them. In fact, most suppliers have a confusing and ambiguous classification of steam traps, and even fewer are thoroughly familiar with the working principles of various types of steam traps. The vast majority of users have only a superficial understanding of the principles and classifications of steam traps. The shortcomings of both supply and demand sides in these areas have led to a chaotic situation in the use of steam traps. Functions and Applications: Generally speaking, the function of a steam trap is to remove water, prevent steam from entering, and discharge air; moreover, the water-removal function can be further divided into enhancing efficiency and providing insulation. The former makes efficient use of the latent heat of steam, with a hydrophobic temperature equal to the saturation temperature ； The latter utilizes the latent heat of steam and part of the sensible heat to dehydrate at temperatures below saturation. How much hydrophobicity is required below the saturation temperature depends on the process conditions. For production equipment that seeks fast heating speeds and high efficiency, efficiency-enhancing steam traps are more suitable ； For equipment that does not require rapid heating and needs to maintain a steady temperature after heating (such as interlayer pots used for cooking in canteens), heat-retaining steam traps are more energy-efficient. When the requirements of practical applications and the functions of a steam trap do not match well, the steam-trapping performance will naturally be poor. Brand and Quality: The quality of check valves is influenced by various factors such as product design, material selection, manufacturing processes, precision of production, testing and calibration, and quality management. Any issue or deficiency in any of these aspects can affect the performance, reliability, and service life of the check valve. Ensuring a high standard in all these aspects (product research and development, processing and manufacturing, market testing and feedback, product iteration, and corporate management) is something that only companies with decades of experience can achieve, and such brands are extremely rare. The actual situation is that many domestic brands engage in OEM production; the brand owners prioritize low prices, while the manufacturers strive to minimize costs. Most steam users are unaware of these situations. Therefore, for users, choosing the right brand and quality of steam traps is also a difficult task. Process and Selection: For many years, steam users have primarily followed a purchasing process that involved inquiring about prices based on the product’s shape (general category) and diameter, and then comparing those prices. From time to time, Fred encounters customers who judge products by their appearance; they insist that the check valves we supply are exactly the same as those used in their facilities, when in fact they are only similar in appearance. It is not uncommon to see this phenomenon of focusing only on the appearance while ignoring internal characteristics and qualities such as the brand, quality, distribution capability, and operational parameters. Such an approach makes it almost impossible to select the proper check valve. A scientific and effective approach is to properly select the type of steam trap based on factors such as the application scenario, requirements of the production process, structure and operating characteristics of the steam-using equipment, condensate flow rate, condensate backpressure, and its discharge destination. On this basis, further select steam traps that meet the highest pressure, temperature, pressure difference, and maximum flow requirements, and can operate within the \"comfort zone\" when the steam-using equipment is running stably. Misunderstandings and misguidance cause many customers to be unable to properly distinguish between new steam and flash steam, leading them to mistakenly attribute normal flashing at the drain valve outlet to a leak in the drain valve. As a result, some manufacturers introduced \"leak-proof\" steam traps or steam drainage devices, and promoted them heavily using this as a selling point. This is actually purely a form of misguidance. As mentioned above, pressure relief valves are divided into efficiency-enhancing types and insulation types. In the case of efficiency-enhancing steam traps, the saturated condensate discharged releases some of its sensible heat when the pressure downstream decreases, resulting in the formation of flash vapor; this is a normal phenomenon, just like the white steam that appears when pouring water from a thermos bottle. The simplest way to eliminate flash vapor is to use insulated steam traps, but this will cause water accumulation inside the equipment and reduce production efficiency. Operation and maintenance: The valve core and seat inside the steam trap are the key components for draining water and preventing steam from entering; they are prone to getting clogged in an environment with rust, scale, and other impurities, which can lead to poor steam trap performance and water accumulation in the equipment ； The valve core can also get stuck, resulting in steam leakage due to improper sealing between the valve core and the valve seat. Furthermore, the repeated opening and closing actions of the steam trap can easily cause wear on the valve core and seat, especially when the steam trap is selected to be too large in size. Therefore, it is necessary not only to clean the filters placed in front of or built into the steam trap regularly, but also to flush the valve element and seat of the steam trap periodically as appropriate. In addition, it is necessary to regularly check the condition of the valve core and valve seat; if wear occurs, they should be replaced promptly. In summary, to fundamentally resolve the hydrophobicity issue, it is necessary to fully understand, properly manage, and effectively implement the six aspects mentioned by Fred; any problem in any of these areas will affect the outcome. From a statistical standpoint, the probability that none of the six aspects will have any problems is merely 1.56%. It seems that fundamentally solving the hydrophobicity problem is indeed not an easy task; no wonder this issue has been plaguing thousands of companies.