Multi-position controller
225). Example based on a two-point controller: temperature control via a device whose contact switches the heating off by means of a contactor when a limit value is reached. Example based on a three-point [...] three-point controller: temperature control for heating and ventilation based on three values associated with the actuator with mechanically controlled valve such as ventilation valve open, both valves closed
Mechanical damping
Damping or buffering via friction or spring-based components.
Separator
Device for separating small particles of dirt from the hydraulic fluid based on other particle characteristics apart from the particle size.
Power hyperbola
Curve based on identical (constant) power in a rectangular p-Q system Power is calculated as follows: P = p · Q
Pipe inductance
the flow rate inside a pipe. It is based on the mass inertia associated with the fluid. The following equation can be written for the change in flow rate dQ/dt, based on a given pressure difference Δp:
Swelling of sealants
polyamide swells strongly in water by approximately 10% or NBR in naphthene-based oils, but very little in paraffin-based mineral oils. . The swelling behaviour of seals must be considered, as this increases
Impulse resistance of hoses
Resistance of pressure hoses to pressure impulses. This is used — based on the max. permissible operating pressure — to determine the number of impulses required before the hose fails.
MZ engine (swashplate machine)
"Torque at the cylinder"; classification characteristic based on drive kinematics for axial piston swashplate (axial piston) pump or motors whereby torque is transmitted to the cylinder drum via the pistons
Phosphate ester
Fire-resistant hydraulic fluid based on esters of phosphates. It belongs to the group known as HFD fluids ; its fire resistance is can be explained by its molecular structure.
Modular design
or even physical units are associated with a defined type of behaviour and can be linked together based on defined rules (EDIN 19 226, Part 5).