Service valve specification: The service valve on the DH225-7 R2 and DH220-5 excavators is a hydraulic valve that is used to control the flow of hydraulic fluid to various components of the machine, such as the boom, arm, and bucket. Some general specifications for the service valve may include:
Maximum flow rate: 310 L/min
Maximum pressure: 34.3 MPa
Number of spools: 4