| 摘要 |
An adjustable regulator insert (2) for valves, in particular for controlling the liquid flow in a plant for central heating or air conditioning. The insert (2) comprises a cup-shaped part (7) with inflow openings (8) and outflow openings (9), wherein the outflow openings (9) are closed off in response to the pressure difference across the insert (2) under the influence of a spring (15) that seeks to keep the outflow openings (9) open. Moreover, the insert (2) is provided with means for adjustable closure of the inflow openings (8), which means comprise a shaft (18) which is rotatable in relation to a jacket (24) and having an outer end (19) which is exposed in relation to the surroundings. The insert (2) also comprises a loose sleeve (20) being in rotationally secured, but axially displaceable engagement with the shaft (18) and being provided with an external thread; and a follower (21) provided with an internal thread being in engagement with the external thread of the bushing (20) and in rotationally secured, but axially displaceable engagement with the jacket (24). When the follower (21) reaches an extreme position its further axial displacement is prevented, whereby the cooperating threads on the sleeve (20) and the follower (21), respectively, cause the sleeve (20) to be displaced axially outwards on the shaft (18) towards its exposed outer end (19), until engagement therewith is no longer possible. |
