| 摘要 |
A steam trap is provided with a bimetallic control element disposed at the prepressure side and a locking element actuated by the bimetallic control element which is biased in the opening direction by the prepressure and which cooperates with a valve seat. The bimetallic control element is provided with at least two bimetallic spring disks which are serially connected in such a manner that when the locking element is open during the slow-speed stroke of the bimetallic spring disks, the stroke movement of the locking element is the sum of the slow-speed strokes of all of the bimetallic spring disks. The bimetallic spring disks are different from each other with respect to their spring force and temperature, as well as with respect to each other's spring constant, so that each of the bimetallic spring disks closes the locking element by a spring stroke within a separate section of the total operating pressure range of the steam trap, at temperatures in the proximity of a predetermined pressure-temperature curve. |
