... easy, reliable; 3. swift from a excavator to a rock/concrete breaker Bolev Hydraulics:Bolev welcomes your visit!HRS-03 2 way ... valve, it is used for convert a excavator into a rock/concrete breaker. it works as:3 ports, P port in, ... , P port to T port, direct to return line, breaker does not work;Position 2, P port to A port ... date of on board.Hyraulic Symbol:Dimensions: Foot control rock breaker valve