| 摘要 |
<p>The said type of valve has a first unidirectional valve (11) and a second unidiredtional valve (14) with oleo-dynamic unlocking, on to the closing mechanism (14a) of which exerts an effect a pilot piston (17) which is subjected, on one surface of a pre-established extension, to the pressure existing in a first inlet (or outlet) orifice (12) of the valve itself. …<??>Furthermore, the said valve is provided with a device for regulating and limiting the pressure, and this supplies the piston (17) with a control pressure whose value falls within a pre-established minimum and maximum.</p> |
