| 摘要 |
<p>A lockshield unit (15) for valves (10) to control the flow rate of a thermal fluid flowing in heating systems; the lockshield unit (15) comprises a closure plug member (14) having a control stem (16) screwable into a guide bush (19), wherein the control stem (16) is operatively connected to a control knob (25) which is supported in an angularly pivoting manner to the guide bush (19), while the control knob (16) of the closure plug member (14) is operatively connected to rotate along with the control knob (25) and to axially slide relative to the knob (25), during the rotation.</p> |
