Directional valve
Directional valves affect the start/stop and flow direction of the hydraulic fluid, and thereby control the movement of the actuators in a hydraulic system. Their function is to direct the flow of hyd
Correcting variable
Output variable of the controller or and also the input variable of the subsystem. It transfers the controlling effect of the device to the subsystem (DIN 19 226).
Gap filter
Filter consisting of a set of fine metal discs with a defined distance and which also determines the maximum filtration grade (Figure M 23). The gap filter is one of the surface filters , i.e. it has
Hydraulic cylinder
Cylinder designed to be used with hydraulic fluids at generally higher pressures (of around 100 bar and above). Given the relatively low compressibility of the fluid and the low weight of a piston, hy
State variable
If the transfer function of a system is described by state equations , this results in a set of first order differential equations, each of which respectively links the input and output of an integrat
Timer element
A distinction is made between: Binary timer elements: Switching element, which passes on binary input signals at a different time; Delay element: Timer element, which reflects the change of the input
Four quadrant operation
Operating modes of drives
Four position valve
Directional valve that has a 4th switching position in addition to the three standard positions. The 4th position can be used to solve particular tasks, such as a fail safe position in the case of a f