putkilämmitin

Putkilämmitin is a Finnish term that translates to "tubular heater" or "sheathed heater" in English. It is a type of electrical resistance heater designed for heating various mediums such as air, liquids, and gases. A putkilämmitin typically consists of a resistance wire coiled and embedded within a mineral insulating powder, such as magnesium oxide, which is then enclosed in a metal sheath. The metal sheath can be made of various materials like stainless steel, copper, or Incoloy, depending on the application and the environment it will be used in.

When an electric current passes through the resistance wire, it heats up and transfers thermal energy through the insulating powder to the metal sheath. The sheath then transfers the heat to the surrounding medium. Putkilämmittimet are known for their durability, versatility, and ability to withstand high temperatures and harsh operating conditions. They are commonly used in industrial processes for heating ovens, tanks, pipes, and air ducts, as well as in domestic appliances like ovens, water heaters, and refrigerators. The specific design and materials used for a putkilämmitin are chosen based on the required heating capacity, operating temperature, and the properties of the substance being heated.