Service valve specification: The service valve on the E320/B/C and E320 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: 410 L/min
Maximum pressure: 35 MPa
Number of spools: 4
Negative relief valve specification: The negative relief valve is a hydraulic valve that is used to control the pressure in the hydraulic circuit when the machine is in a freefall condition, such as during boom lowering. Some general specifications for the negative relief valve on these excavators may include:
Maximum pressure: 2.8 MPa
Flow rate: 30 L/min