Rotary transfer joints
Rotary joint for the flow of hydraulic fluid between a stationary and rotating part of the machine. Multiway rotary transfer joints : Rotary transfer joints for supplying one or more loads with pressu
Direct actuation of valves
The actuating force acts directly on the function element of the valve, i.e. on directional valves : The control spool is actuated directly by hand, by pressure or by a solenoid ; pressure valves : Th
Filter for oil removal
Filter whose task is to filter out oil droplets from compressed air. They are installed in the compressor group behind the recooler and contain a specific filter element ( Figure O 3 ).
Holding current
Minimum current needed to flow in an electrical load circuit (e.g. in a solenoid or another electro-mechanical signal converter) in order for a valve to be held in the closed position by the electro-m
Flow control valve
Throttle valve with adjustable throttle ( measuring throttle , A P), in which the flow remains constant through the combination of the valve with a control throttle (, A R), regardless of the changing
Dirt absorbing capacity of a filter
Also called the real dirt holding capacity. This provides information on the quantity of dirt that a certain filter can hold before a reference pressure (normally the response pressure of the bypass v
Open circuit
Basic design for a hydraulic drive in which the pump draws in the hydraulic fluid from a storage tank, the surface of which is open to atmospheric pressure. The oil is conveyed to the consumer via dir
Compact seal
Design category for seals with a block-like body and a less pronounced sealing edge. A characteristic feature is how the preload is applied not only by the sealing lips , but also by the body of the s
Delivery flow
Flow rate that a pump delivers. The term delivery flow should as far as possible no longer be used in fluid technology, instead flow rate should be used.
Centralised hydraulics
Centralised hydraulic oil supply .