| 摘要 |
The purpose of the present invention is to provide a hydraulic control valve having excellent durability which is not deformed while the valve is used when the hydraulic control valve of high pressure is operated. To achieve this purpose, the present invention comprises: an inlet section having a flow passage where hydraulic oil of a high pressure is introduced and discharged from a hydraulic pump; a body coupled to the inlet section having the flow passage where the hydraulic oil of the inlet section is introduced; one or more mid-inlet section having a spool installed in the flow passage to control a flow of a fluid to operate a hydraulic component; and an end section coupled to the mid-inlet section having the flow passage recovering the hydraulic oil introduced from the mid-inlet section to an oil tank. The inlet section, the mid-inlet section, and the end section are thermally treated to enhance durability. |
