| 摘要 |
A thermostatic element includes an elongated cap, containing a material expandable and contractible as a function of the direction of variation of its temperature. A piston moveable in the longitudinal direction of the cap is coupled to the expandable and contractible material so as to be displaced in opposite directions, depending on whether the material expands or contracts. The side wall of the cap has flats or depressions around the cap and which extend in the longitudinal direction of the cap and which delimit an inner space. The cross section of the inner space, the length over which the flats or depressions extend, has a lobed shape, and an insert accommodated and fixed in the cap extends in the longitudinal direction of the latter.
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