Solenoid valve

Claim 1

A power operated valve comprising: a. a valve body (10) having an inlet chamber (13) and an outlet chamber (14) with a main valve seat (15) therebetween, said main valve seat (15) having a passageway therein; b. a cylinder member (24) removably mounted on the lower surface of the valve body having a cylinder chamber (25) opened to the interior of the inlet chamber; c. a main valve element (26) movably positioned in the cylinder chamber for selectively communicating the inlet chamber (13) with the outlet chamber (14) through said passageway in the main valve seat (15), a subsidiary valve seat (29) positioned on the same axis as of the main valve seat, said subsidiary valve seat having a passageway therein; d. a limit member (34) adjustably disposed in the cylinder chamber for limiting the movement of the main valve element within a desired movement quantity range; e. a subsidiary valve element (30) movably disposed below the subsidiary valve seat (29) for selectively communicating the cylinder chamber with the outlet chamber through said passageway in the subsidiary valve seat; f. spring means (37) disposed between the subsidiary valve element and the limit member (34) to urge the main and subsidiary valve elements to normally closed positions; g. an actuator rod (41) extending from the subsidiary valve element (30) through the passageways to move the subsidiary valve element to the opened position; h. a solenoid structure (39) removably mounted on the upper surface of the valve body for reciprocating the actuator rod having a plunger (47) positioned on the same axis as of the actuator rod (41) to be detachably connected with it; and, i. a manually operated knob (55) removably mounted on the solenoid structure (39) for reciprocating the actuator rod (41) having a knob shaft positioned on the same axis as of the plunger (47) to be detachably connected with it, said main valve element having a piston portion adapted to be inserted in the cylinder chamber, whereby the main valve element is slowly moved from the opened position to the closed position.