●  Full—hydraulic reversing open type system with high cleanliness of hydraulic liquid，low oil temperature and less reversing impulsion;
●  Auto—return concrete piston makes the replacement of concrete piston more convenient and much faster;
●  Full automatic switch between high and low pressure，toggle switch operation，free of leakage and pollution of the hydraulic liquid aswell asfast dredge ofthe blocking pipe;
●  The electric—hydraulic proportional control technology is able to realize infinitely variable control on the pump displacement;
●  PLC control real-tlme text dlsplay of lnformation of worklng condltions ensures safe and reliable operation;
●  Wired remote facilitates the mamtenance and operation;
●  The main oil cylinder adopts proprietary technology of water—proof packingt o effectively avoid emulslfication of the hydraulic liquid;
●  Advanced S—tube valve system with good leak tightness，simple structure and convenient replacement of the wearing parts;
●  The proprietary hard—carbide glasses plate and the cutting ring prolongs service life;
●  Main hydraulic components are ofwell—known international brands with high reliability.