Thermal servo-motor, particularly for valves

Details Thermal servo-motor, particularly for valves Thermal servo-motor, particularly for valves

F - Mech Eng,Light,Heat,Weapons

16

K

236/12

F16K 31/00 (2006.01) F03G 7/06 (2006.01) G05D 23/02 (2006.01) G05D 23/19 (2006.01)

Patent

CA 1227175

Abstract A thermal servo-motor, particularly for valves comprises two operating elements (4, 5), particularly bellows boxes, acting oppositely on an actuating bridge. Each operating element is connected to a container (35, 36) containing the medium (37, 38) of a filling that determines the pressure. The connection is by way of an intermediate member (39, 40) which has a passage and which at least partially thermally insulates the operating element and container from each other. The container space is small relatively to the smallest volume of the operating element (4, 5). A tempering apparatus (41, 42) is associated with the two containers (35, 36). In this way, one can produce the desired vapour pressure in the operating elements with respectively little heat power. The servo motor can be rapidly adjusted. Fig. 1.

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