| 摘要 |
<p>Double regulating balancing valve (10), comprising a valve housing (11) providing a valve seat (18); a valve plunger (19) acting together with the valve seat; a valve insert comprising a spring (24), whereby a spring force provided by said spring (24) acts in such a way on a valve stem (25) to which the valve plunger (19) is mounted that the spring force tends to lift up the valve plunger from the valve seat; a hand wheel (35) acting together with a force transmitting screw (36), whereby the force transmitting screw acts in such a way on the valve stem (25) that the force transmitting screw compresses the spring (24) against the spring force depending on the position of the hand wheel (35); a presetting screw (39) providing a stop for the force transmitting screw (36) in such a way that the position of the presetting screw limits the movement of the force transmitting screw (36) in opening direction of the valve; whereby within said hand wheel there is positioned a connector terminal (42) to which an external device is mountable; and whereby said presetting screw (39) and said force transmitting screw (36) comprise each a through port (45, 46) through which a pushing element of said external device can extend so that the external device can act on the valve stem. ( Figure 1 )</p> |
