[Video Introduction] What are protective tubes and thermowells? Functions, applications, and design.
WIKA pressure sensor
It briefly explains questions such as why protective tubes are used for temperature measurement, what designs and materials are available, and how dimensions are determined.
▬ Content of this video ▬▬▬▬▬▬▬▬▬▬▬▬ 0:00 Intro 0:09 Function of the protective tube 0:23 Process connection of the protective tube 0:45 Protective tubes for hygienic applications 0:58 Stem shape of the protective tube 1:22 Material of the protective tube 1:37 Matching of thermometer and protective tube Why use a protective tube for temperature measurement? What designs and materials are available for protective tubes? Who determines the dimensions of the protective tube? These are common questions from our customers. Here, we summarize answers to these questions along with other interesting information. What is the function of the protective tube? Protection of temperature measuring instruments Protection of the human body and environment Cleaning and replacement of temperature measuring instruments during operation To enable accurate temperature measurement, it is necessary to match the thermometer and protective tube to the operating conditions. There are no unified standards for the strength calculation and design of protective tubes globally, which can lead to human disasters due to defective designs. Guidelines such as ASME B40.9, API 551, and DIN 43772, as well as customer-specific standards, are used. At WIKA, we provide consultation for the perfect matching of protective tubes and temperature probes, as well as strength calculations.
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basic information
The protective tubes are mainly available in flange connection, threaded connection, and welded connection. Flange connection is the most common and is adopted in many processes. Threaded connections have a compact shape, take up less space, and are easy to install. If safety in the process is a priority, the protective tube can be directly welded to the piping. For the food and pharmaceutical industries, we also offer special protective tubes with sanitary connections, which can be used in processes that require cleaning. What designs are available for the protective tube stems? - Tapered type - Straight type - With step In many cases, the tapered stem design is used. The tapered stem has the characteristics of a short response time and high rigidity. The straight type is the most commonly used for protective tubes, particularly because it is a cost-effective structure. For high-load applications that involve strong vibrations within the process, we recommend ScrutonWell's protective tubes. What materials are the protective tubes made of? The standard material is stainless steel, but they can also be made from special materials such as C276 and 400. Depending on the application and material, it is also possible to line only the parts that come into contact with the process media.
Price information
10,000 yen to 350,000 yen Prices vary depending on product specifications.
Price range
P2
Delivery Time
※2 to 3 months after your order
Applications/Examples of results
For more details, please feel free to contact us.
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Company information
"WIKA" is a global manufacturer of measurement instruments headquartered in Germany. For over 70 years, it has maintained a top-class market share in measurement instruments as a specialized manufacturer in the global market. It is the number one manufacturer in Europe for measurement instruments, including pressure gauges and thermometers, widely used in the manufacturing industry, such as plant equipment, and is among the top manufacturers in the world. Currently, it operates in over 40 countries worldwide and boasts a total workforce of 9,000 employees, making it a global company. The Japanese branch has seen a steady increase in performance and has a track record of transactions with major companies across a wide range of industries, including large heavy industry manufacturers. The brand power and product strength are so high that it is often said, "Measurement instruments are WIKA." With bases in over 40 countries, as Japanese companies become more active in expanding overseas, the demand has also increased, and the company's strength lies in its ability to handle everything, including follow-up after product installation. Because it offers a wide range of products not found in other competitors, it can provide comprehensive solutions to meet customer needs.