| 摘要 |
PCT No. PCT/SE85/00396 Sec. 371 Date Jun. 18, 1986 Sec. 102(e) Date Jun. 18, 1986 PCT Filed Oct. 15, 1985 PCT Pub. No. WO86/02443 PCT Pub. Date Apr. 24, 1986.A device for indicating changes of a fluid flow, comprises a housing (1) and a support member (7), connected with the housing. A valve member (11) is slidable on the support member (7) and is adapted to increase or decrease the through-flow area of a passage (14) provided in the housing for the fluid flow. A spring (13) supported by said support member (7) is urging the valve member to decrease the through-flow area of the passage. Indicating means (15, 16) is arranged to indicate the position of the valve member (11) in the housing. According to the invention, the support member (7) is adjustable relative to the housing in the moving direction of the valve member (11) for adapting the position of the valve member (7) to various magnitudes of fluid flow through the passage (14).
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