A direct-coupled solenoid valve comprising: a main valve segment having multiple ports to pass a hydraulic fluid,Forged Steel Valves a valve duct into which the ports open in an axial sequence, and a valve member movably fitted in the valve duct and opening and closing the passages between said ports; a solenoid control segment having an armature operated by the on-off action of an exciting coil and directly opening and closing the valve member;Water Pump Control Valves an armature in the solenoid control segment, said armature having an iron core having a center hole,MULTI-FUNCTIONAL WATER PUMP CONTROL VALVE a length setting member fittable in the center hold such that said armature and said length setting member jointly determine the length of the iron core, wherein a tip of said length setting member protrudes from said center hold and comes into contact with one end of the valve member, a pressing member whose end comes into contact with the stator, movably accommodated in the center hole in the iron core; and a return spring compressed between the pressing member and the length setting member. A direct-coupled solenoid valve of known type comprises a main valve segment having multiple ports to pass a hydraulic fluid, a valve duct into which said ports open in an axial sequence, and a valve member movably fitted in the valve duct and opening and closing the passages between said ports, and a solenoid control segment having an armature operated by the on-off action of an exciting coil and directly opening and closing the valve member. When the main valve and solenoid control segment segments of a direct-coupled solenoid valve of the type described above are connected together, the armature contacts one end of the valve member, either directly or through a suitable intermediate member, and the motion of the armature is directly transmitted to the valve member. Therefore, the valve member of the main valve segment and the armature of the solenoid control segment must be of such size that the valve member and armature come into contact with certainty. When the valve members of the main valve segments have different lengths or stop at different points at the end of the stroke, therefore, multiple solenoid control segments having armatures of correspondingly different sizes have been required. The need to use solenoid control segments and, in particular, armatures of different sizes has introduced considerable complications in the design and manufacture of solenoid valves and inconveniences in their handling.

MORE NEWS