| 摘要 |
<p>A fluid flow control valve comprising a flow passage (1a), a valve seat (1c) in the passage selectively openable by a valve member, a rotatable stem (9) controlling the valve means by moving longitudinally in response to rotation within a bonnet (3) and a handle (12) for rotating the stem, the handle being lockable against the bonnet (3) to prevent rotationand thus set the flow rate, characterised in that the handle (12) comprises a main part (12') fixed to the stem (9) and a locking part (12'') coupled to the main part so as to allow relative movement in a direction laterally of the stem longitudinal axis the locking part (12'') including a locking screw (14) movable to act against the bonnet (3) to prevent rotation of the handle (6) thus setting a rate of flow through the valve. <IMAGE></p> |
