| 摘要 |
<p>This actuator (1) comprises: a cylinder (2) which has a tube-like shape and which is filled with fluid; a piston (3) which divides the inside of the cylinder in the axial direction thereof into a first chamber (11) and a second chamber (12), can be moved in a reciprocating manner, and opens and closes a main valve (4); a fluid supply means which supplies fluid to the second chamber; a pressing means (6) which presses the piston in the axial direction toward the second chamber; a flow passage (7) which connects the first chamber and the second chamber; and a pilot valve (8) which closes the connecting flow passage.</p> |
