astronautas

Nobody likes to slam the door, but it must be closed tightly to prevent heat from leaving the room. For a silent process, an automatic door opener is installed. Such designs replace the installation of door springs, which when closing the doors generate a lot of noise. Types of devices, their characteristics and installation methods. Device and operating principle of automatic door openers . Nearest device The main work element of any closer is a high-strength spring that enters the door cylinder into the closer. When you open the door, it compresses, accumulates energy, and when released, the door returns to its initial closed state. For a smooth closing of the opening in the automatic door opener there is an oil damper. The built-in valve system facilitates the flow of oil when doors are opened from one chamber to another and when they close. With its help, the speed of movement of the oil and, therefore, the closing speed of the doors is regulated. The necessary smoothness of the