The direct acting and pilot operated relief valve have a different pressure vs. flow curve although both of them perform the same function. The pilot…
Hydraulic oil is cooled by a heat exchanger, there are 2 type of hydraulic oil heat exchanger: shell-and-tube and finned tube. The shell-and-tube heat exchanger…
Bendix hydro boost brake system was designed by Bendix Corporation to simplify the engine compartment. The figure above shows the Bendix hydro boost brake system…
The figure above illustrated the working principle of direct acting relief valve. When the hydraulic force Fh equals spring force Fs, the valve cracks open,…
Pressure control is the most important element in hydraulic circuit. Hydraulic components are designed to operate on a specific pressure range with capability to withstand…
A counterbalance valve opens a free flow in one direction while regulating the opposite flow until a certain pressure is reached. Counterbalance valve typically installed…
A poppet valve consists of movable poppet which closes against a valve seat. The inlet pressure will hold the valve on closed position. The poppet…
In an open-center sliding spool directional control valve, the spool is designed to pass all flows on all its passages when the valve is centered.…
In a closed-center sliding spool directional control valve, all the flow passages are blocked when the piston is centered in its body. The closed-center valve…
Manually operated directional control valve is used to control the flow direction by manual hand force. The spool can be shifted by applying force at…