A VALVE DEVICE OF PISTON CONTROL OF HYDRAULIC-DRIFTER

摘要

PURPOSE: A valve device of piston control of hydraulic-drifter is provided to minimize the leakage and reduces maintenance and maintenance costs. CONSTITUTION: A valve device of piston control of hydraulic-drifter comprises a shank adapter, a valve sleeve(170), a hydraulic opening and closing valve, a first and a second hydraulic supply port and a first and a second fluid pressure inlet port. The shank adapter is connected and installed with the blow load in order to be hit to a hydraulic part. The valve sleeve is formed into an oil pressure tube(160) communicated with a high pressure supply globe of cylinder. The hydraulic opening and closing valve is formed between the valve sleeve and valve plug(190). The second hydraulic supply port and the second fluid pressure inlet port drop the hydraulic piston ascended and descended in the hydraulic opening and closing valve lower.