| 摘要 |
PURPOSE: To operate coolant safely and reliably in a dirty circumstance by individually controlling coolant control valves through a surrounded solenoid operating pilot control valve which is adjacent to the coolant control valve. CONSTITUTION: A pilot operated coolant control valve assembly 10 has a multiple housing shaped 11, and is divided into pilot air supply room 13, electricity control room 14 and a coolant supply room 15. While electric current of the coil 51 is fumed off and spring 55 moves plunger 49 to the left, a seal in the opposite end of the plunger 49 connects with the opening of pilot valve 54 and closes it. By this way, fluid air pressure passes through the air path 22 which flows through pilot valve 46, path 47 and inlet 36, then is introduced to the pilot air working room 29, presses the valve element 31 to the front to cut off the coolant flowing to nozzle 56. |
