| 摘要 |
<p>The valve has a throttle valve control device with control fluid pressure distributing units to distribute the pressure over two surfaces of a piston (4) of a throttle valve and to modify a surface common to the surfaces of the piston. The units apply upstream and downstream pressures over the surfaces, so that equilibrium position of the throttle valve is only defined by the ratio of the two pressures. An independent claim is also included for a usage of a valve to control fluid flow at very low and high temperatures.</p> |
