Dead volume
of the device, which is part of the dead volume. In addition, the decrease in volume under pressure may also have a disruptive effect. Example: Volume between the servo valve and cylinder in the case of
Amplifier card
the prescribed transfer element and the adjustment. In exceptional cases, the electric power supply may be housed in the card, e.g. if a central electric power supply is not justified due to the use of not
Hydraulic capacity C h
dependent on the piston position (Figure H 18) . In the event of pressure reductions, an increase in C h may have a beneficial effect on dynamic performance.
Positioning error
Errors which (may) occur when positioning hydraulic drives. They consist of; the Δs N, errors associated with hysteresis and the reversal error for the continuously adjustable valve (between 0.1% and 2
Methods of valve installation
necessary ports such that it is possible to replace a valve without dismantling the pipe. The manifolds may also be suitable for stacking. Plug-in designs for installation in control blocks. sandwich plate valve
Hydrostatic transmission
a confined space, the term used is integral hydrostatic transmission . A hydrostatic transmission may be based on the combination variable pump fixed displacement motor , ( primary control ), constant
Hydraulic seals
areas under pressure in such a way that pressure levels are maintained. These are contact seals that may also be used at high pressures levels. The materials used for hydraulic seals are predominantly elastomers
Calculating the sound power
noise measurement. are available to determine the sound power. The calculation of the sound power may be performed by measuring the sound pressure in a soundproof room or in a free field or in an echo [...] statement to be made with regard to the noise emissions at the installation location. As a rough guide, it may be assumed that the hydraulics of a machine, considering all secondary measures will be at least 5
Mooring control
adjusted in line with the pilot pressure , while maintaining a constant torque level, although this may be modified in accordance with the conditions. If the cable is not under tension, the operating pressure
Pre-charged oil tank
balance is instead created using a diaphragm or membrane ( Figure V 39 ). The pre-load of the container may also be a suitable measure to improve the suction behaviour of pumps.