... efficency, safety,reliability,easy operation environment friendly, etc.ZR160 Hydraulic Rotary Drill RigTechnical Parameters Engine modelDeutzF8L413Rated power140kwSystem pressure31.5MpaSystem flow2 ... arranged in neat order to extend its service life.Hydraulic systemNegative flow control technology and priority control technology ensure ... of equipment. ZR160 HYDRAAULIC ROTARY DRILLING RIG,Pile Driver