Hydraulic valve job role

Hydraulic valve job role
1, acting hydraulic valves, types and common; the role of hydraulic flange, types and common; one-way valve, check valve working principle and its application;
2-way valve, check valve works and application; spool type valve commutation principle, spool type valve commutation principle, "bit", "pass", spool function (median performance) and manipulate the way the application; "slide valve function (median performance)," ways to manipulate and use; relief valves, valves, sequence valves
3, relief valve, pressure relief valve, sequence valve, the working principle and application of pressure relay; for Principles and Applications;
Characteristics of the throttle, the main structure and working principle;
  4, the characteristics of the throttle, the main structure and working principle; a typical control valve structure, working principle;