| 摘要 |
<p>The servo-motor (1) and valve (2) are mounted on a common support (23,24). The valve stem is extended beyond the gland nut (18) and connected to a shoe (13a). The servomotor consists of an air chamber (32) inside which is a diaphragm (29) whose spindle (38) is connected to the common pivot (41) of a linkage. This is housed on the upper chamber (45) of the support and the force of the diaphragm, at the same time enabling the positioning of the valve stem. The actuator spring (53) returns the valve to the closed position when the air pressure on the diaphragm is released.</p> |
