| 摘要 |
<p>A valve insert (1) comprising a valve housing (3) with at least one opening (9), a hollow valve element (2) with an inner diameter, d2, the valve element (2) being arranged to be displaceable within the valve housing (3) along a longitudinal axis, L, of the valve insert (1), a circumferential diaphragm (8) extending between an outer surface (22) of the valve element (2) and an inner surface (31) of the valve housing (3), a helical spring (6) extending substantially along the longitudinal axis, L, having an outer spring diameter, d6, and arranged within the valve element (2) to bias the valve element (2) towards the open position, the helical spring (6) having an upper end (6b) supported by an upper spring support (7) attached axially fixed to the valve element (2), and a cover disc (4) with a central inlet opening (5), the cover disc (4) being adapted for being positioned in a use position at the top end of the valve element (2) in which use position the size of the central inlet opening (5) presets a maximum flow through the valve insert (2), the outer spring diameter, d6, being less than 90 % of the inner diameter, d2, of the valve element (2), and the upper spring support (7) being arranged at a distance, D, from a bottom of the cover disc (4) in the use position of the cover disc (4).</p> |
