| 摘要 |
The valve has a housing (1) containing a movable body (11) and an operating component incorporating a spindle (12). One end of the spindle is connected to a pressure-sensitive piston (15). The operating chamber (2) is connected to the valve housing input (8) and the pressure-sensitive piston (15) forms a wall in the chamber. Another pressure sensitive piston (16) mounted on the spindle (12) forms a wall in the valve housing (1). The two pressure-sensitive pistons (15,16) are separated by a spring (13) which activates the valve spindle (12) so that the valve body moves to the open position. Each of the two pistons (15,16) is sealed by a roller membrane (18). The outlet (5) of the operating chamber is connected via a regulating valve (6) with inlet (8) of the valve housing. |
