Axial three-way valve for district heating system has temperature measuring device and valve disc which prevents cold medium entering middle chamber until piston is in lower position

摘要

A hot medium enters the valve housing (1) in the direction A, and exits in the direction B. Directions A and B are on the same axis (19). An internal housing (25) and an internal chamber (18) with ribs (24) are arranged in the middle chamber (29). The ribs and the internal chamber are parallel and concentric to the axis (19). A collet (22) is installed in the inner chamber and fixed via a safety spring (21). The collet presses an opening spring (26) via a piston (23) along an axis (27) on which a lower valve disc (30) is arranged. The lower edge (16) of the valve disc presses on a rim (15) to close the entry of cold medium from a direction C through a channel (17) and the internal chamber into the middle chamber, until the piston is in its lower position and the inner housing is sealed against the channel by seals (28).