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A
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C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
Z
Fabric materials
Fail safe
Fail safe position
Failure rate
Fast excitation
Fatigue strength
Fault detection
Fault detection code
Fault diagnostics
Feed-forward control
Feedback
Feedback signal
Feedback system for continuously adjustable valves
Feed circuit
Feed height
Feed motion of a cylinder
Fieldbus
Filler filter
Filling pressure
Filter
Filter cartridge
Filter characteristics
Filter class
Filter cumulative efficiency
Filter dirt load
Filter disposition
Filter efficiency
Filter element
Filter for oil removal
Filter in main conduit
Filter installation
Filter life
Filter pores
Filter selection
Filter size
Filter surface
Filter tissue
Filter with bypass valve
Filtration
Filtration efficiency in general
Final controlling device
Fine control of flow
Fittings
Fitting with conical ring
Fitting with friction ring
Fixed displacement motor
Fixed program control
Fixed throttle
Flag
Flame-resistant hydraulic fluids
Flange connection
Flange mounted filter
Flange mounting of a cylinder
Flapper-nozzle amplifier
Flapper-nozzle system
Flare tube fittings
Flat seals
Fleece filter
Fleece material
Flip flop
Flow/pressure diagram
Flow/signal function
Flow coefficient Kv (Kv value) of a valve
Flow coefficient αD
Flow control valve
Flow control valve, 3-way flow control valve
Flow diagram
Flow diagram of continuously adjustable valves
Flow divider
Flow division
Flow force
Flow in gaps
Flow in pipelines
Flow losses
Flow machines
Flow monitor
Flow parameter
Flow rate
Flow rate-dependent pressure loss
Flow rate/pressure characteristic
Flow rate/signal characteristic curve
Flow rate amplification
Flow rate asymmetry
Flow rate division
Flow rate linearity
Flow rate measurement procedure
Flow rate measurement procedure
Flow rate pulsation
Flow rate range of flow requirement
Flow rate saturation range
Flow rate stiffness
Flow resistance
Flow resistance of filters
Flow sensor with oval rotor assembly
Flow sounds
Flow switch
Flow valves
Flow velocity in pipelines and valves
Fluid friction
Fluid level gauge
Fluid mechanics
Fluid power standards
Fluid power systems with main pipe
Fluids
Fluid technology
Flushing a system
Flushing power pack
Flushing pressure
Flushing pump
Flush valve
Foaming tendency
Following control valve
Following velocity error
Follow up control
Follow up error
Foot mounting
Force-time diagram
Force: impulse, signal: pulse
Force density
Force feedback
Force gain Eo
Force measuring
Force multiplication ratio
Force sensor
Force vs. pressure
Foreword to the online edition of the O+P-Fachlexikon "Fluidtechnik von A bis Z" (O+P technical glossary "Fluid technology from A to Z")
Form elasticity
Form of pulses
Forward and return stroke
Four-way valve
Four position valve
Four quadrant operation
Framework conditions
Frequency analysis
Frequency filter
Frequency limit
Frequency modulation
Frequency response
Frequency response for set input
Frequency spectrum
Friction
Frictional pressure
Friction conditions
Friction in seals
Friction losses
Functional control
Function chart
Function diagram
Radial gap compensation
Radial piston motors
Radial piston pump
Radial piston pump with external pistons
Ramp
Ramp generator
Range of operating pressure
Rapeseed oil
Rapid traverse
Rapid traverse circuits
Rate of pressure rise
Ratio of piston areas α
Reaction force at a control edge
Reactionless transfer
Readily biodegradable fluids (hydraulic oils)
Real dirt-holding capacity
Real time computer
Recirculation
Recovery time
Redundancy
Reference signal
Reference variable
Reflective silencer
Regenerative circuit
Regulator
Regulator controller with fixed set point
Relative delivery fluctuation δ
Relative signal amplitude
Releasable check valve
Release pressure
Release signal
Release valve
Remote control
Repeat accuracy (reproducibility)
Repeat conditions
Replacement orifice diameter
Reproducibility
Reprogrammable control
Required filtration grade
Requirement profile
Reservoir expansion capacity
Residual contamination
Residual oil content (PN)
Resistive measurement
Resistor circuits
Resolution
Resolver
Resonance
Resonance angular frequency
Resonance length
Response pressure
Response sensitivity
Response threshold
Response time of a cylinder
Response value
Rest position
Retention rate
Return line
Return line filter
Return line pressure
Reversal error
Reversible hydrostatic motor
Reversing motor
Reversing pump
Reynolds number Re
Rigid vane machine
Ripple
Rise rate of a signal
Rise response
Rise time
Rodless cylinder
Rod sealing
Roller lever
Rolling vane motor
ROM
Roof-shaped seal
Rotary amplifiers
Rotary flow divider
Rotary pipe joint
Rotary piston
Rotary transfer joints
Rotary valve
Rotation servo valve
Round sealing rings
Run up performance
Run up time constant To
D-element
Damped natural oscillation
Damped natural oscillations
Damping coefficient d
Damping D
Damping device
Damping in the control circuit
Damping network
Damping of cylinder motion
Damping of valves
Damping pressure
Damping seal
Darcy friction factor λ
Data rate
Data sampling
DC measuring amplifier
DC solenoid
De-emulsifying mineral oils
Dead time
Dead volume
Dead zone compensation
Decompression shock
Degree of contamination of the hydraulic fluid
Degree of freedom
Delay element
Delay valve
Delivery flow
Delivery flow control
Delivery flow pulsation
Density function of a liquid
Describing function
Description methods for control circuits
Design pressure
Desired pressure
Destroke time of a pump
Detent
Detergent/dispergent mineral oils
Device oriented plan
Diagnostic systems
Diaphragm (membrane)
Diesel effect
Differential choke
Differential cylinder
Differential piston
Differential pressure
Differential pressure gauge
Differential pressure measurement
Differential transformer
Differential volume
Digital
Digital/analogue converter
Digital circuitry
Digital control
Digital control theory
Digital control with signal hold
Digital cylinders (with several positions)
Digital input step
Digitally controlled valves
Digital measured signal
Digital measured value acquisition
Digital measuring procedure
Digital measuring technology
Digital pump
Digital setpoint control
Digital signal processing
Digital signals
Digital system
Digital technology
Digitising (quantising)
Direct actuation of valves
Directional flow control valve, 2-way flow control valve
Directional valve
Directional valve
Directional valve, 3-way valves
Directional valves 2-way valves
Dirt absorbing capacity of a filter
Dirt holding capacity
Dirt scraper
Disc-seated valve
Discontinuous controllers
Discrete
Dispergent oils
Displacement chamber machines
Displacement control
Displacement flow
Displacement machine (displacement unit)
Displacement units
Displacement V 2
Displacement volume
Disposable filter element
Dissipated heat
Disturbance location
Disturbance range
Disturbance variable
Dither signal
Doppler effect
Double acting cylinder
Double acting hand pump
Double pot seal
Double pump
Down time
Drag flow
Drag flow pressure
Drag indicator
Drift
Drive power
Driver
Drop-off time
Dual loop control circuit
Dual variable pump
Duo pump
Durchflussverteilung (Flow Sharing)
Duty ratio
Dynamic characteristics of continuously adjustable valves
Dynamic pressure
Dynamic pressure principle for flow rate measurement
Dynamic seal
Dynamic viscosity
Tachogenerator
Tandem cylinder
Tank
Teach-in programming
Technical cybernetics
Telescopic connection
Telescopic cylinder
Temperature compensation in measuring technology
Temperature drift
Temperature measurements in hydraulics
Temperature measuring device
Temperature range
Temperature response
Terminal
Test bench
Test conditions
Test pressure
Test signals
Thermodynamic measuring
Thermoplastic elastomers
Thermoplastics
Thickened water
Thin foil element
Thin foil strain gauge
Threaded shaft seal
Three chamber valve
Three input controller
Three position valve
Three stage servo valve
Threshold
Throttle
Throttle check valve
Throttle forms
Throttle valve
Throttling point
Through piston rod
Tie-rod-cylinder
Time-based control
Time-based workflow control
Time-continuous signal
Time-dependent control signals
Time constant
Time discrete
Timer element
Timing control
Tolerance of unit step response
Top pressure limit
Torque amplifier, electrohydraulic
Torque characteristic
Torque input pump
Torque limitation
Torque measurement
Torque motor
Torque multiplication
Torque output hydraulic motor
Total efficiency
Total pressure
Transfer element
Transfer factor
Transfer function
Transfer function φ of a system
Transfer signal
Transient response
Transition piece
Transmission efficiency
Transmission method
Transmission pressure
Transmission ratio
Transmission speed
Transmission technology
Transmitter (unit transducer)
Transport movement of a cylinder
Tribology
Trigger signal
Tuning
Turbulent flow
Twin filter
Twin pressure valve
Two-hand control
Two-line system
Two-point behaviour
Two-point controller
Two-position valve
Two-quadrant operation
Two edge control
Two stage servo valve
Types of friction
Types of motion of cylinders
Types of mounting of cylinders
SAE flange
Safety circuit
Safety control circuits
Safety gate valve
Safety lock
Safety of a system
Safety regulations
Safety risk
Safety valve
Sampler
Sampling and hold block
Sampling control circuit
Sampling controller
Sampling error
Sampling feedback control
Sampling frequency
Sampling time
Sampling transfer elements
Sandwich plate valve designs
Saponification number
Scraper
Scraping seal
Screen filter
Screen mesh filter
Screw-in cartridge valve
Screw-in throttle
Screw connections
Screw spindle pump
Seal
Sealing compatibility index (DVI)
Sealing element
Sealing friction
Sealing gap
Sealing lip
Sealing piston
Sealing profile
Sealing set
Sealing system
Seal leakage
Seal preload
Seals
Seal wear
Seated valve
Secondary adjustment of hydrostatic transmissions
Secondary measures (in the case of sound)
Secondary pressure
Segment pressure compensator
Self-monitoring of systems
Self-priming pump
Self-tuning controllers
Selsyn rotary position encoder
Semi-automatic control
Semiconductor memory
Semiconductor strain gauge
Sensitivity of a measuring device
Sensitivity of hydraulic devices to dirt
Sensor
Sensor for actual values
Sensor system
Sensor technology
Sensor valve
Separate circuit hydraulic
Separation capability
Separator
Sequence control
Sequence control of actuators
Sequence diagram
Sequence of measurements
Sequential
Serial
Series-production cylinder
Series circuit
Series connection
Series connection characteristic
Servo-suction valve
Servo actuators
Servo cylinder
Servo drive
Servo hydraulic system
Servo motor
Servo pump
Servo technology
Servo valve
Set geometric displacement
Set of operating conditions
Setpoint
Setpoint generation
Setpoint generator
Setpoint processing
Set pressure pe
Setting point
Setting pulse
Settling process
Settling time
Settling time of pressure
Settling time T g
Shaft load in a displacement machine
Shear stability of a hydraulic fluid
Shock wave
Shore hardness
Short stroke cylinder
Shut-off unit
Shut-off valve
Shuttle valve
Signal
Signal/noise ratio
Signal amplifier
Signal duration
Signal flow diagram
Signal forms
Signal generator
Signal output element
Signal parameter
Signal path
Signal processing
Signal processor
Signal selector
Signal state
Signal switch
Signal technology
Signal transducer
Silencer
Silting
Single acting cylinder
Single circuit system
Single control for an actuator
Single edge control
Single loop control circuits
Single or separate drive for machines
Single quadrant operation
Single resistor
Single stage servo valves
Sintered metal filter
Sinus response
SI units
Six-way valve
Slave piston principle
Slider
Sliding friction
Sliding gap
Sliding ring seal
Slipper
Slotted proximity switches
Slow speed high torque motor
Small signal range
Smoothing a signal
Solenoid
Solenoid actuation
Solubility of gas in a hydraulic fluid
Sound in air
Sound in fluid
Sound pressure p
Sources of error in measuring instruments
Special cylinder
Special gear pump
Specific impedance
Speed characteristic of hydraulic motors
Speed control circuit
Speed measurement
Speed range
Speed ratio
Spherical cone
Spring accumulator
Spring assisted sealing elements
Spring reset
Square (root) flow equation
Squeeze stress in seals
Stabilised hydraulic oils
Stability analysis
Stability criteria
Stability of a hydraulic fluid
Staged clock control
Staged pump
Staged switch motor
Standard cylinder
Standard deviation of a measurement
Standby pressure
Start-up time
Starting characteristic
Starting performance of hydraulic motors
Starting position; basic position
Starting torque
Start pressure
Startup discontinuity
Startup process
Start viscosity
State controller
State diagram
State equations
Statement list
Statement list
State variable
Static behaviour
Static parameters of continuously adjustable valves
Static seal
Stationary flow
Stationary hydraulics
Stationary state
Status monitors
Steady state
Step control action
Step diagram control
Step function
Stepper motor
Stepper motor-controlled proportional directional valve
Stick slip
Stiction of seals
Stiffness of actuators
Stiffness of a hydraulic fluid
Storage volume
Straight pipe fitting
Strain gauge
Stress relaxation
Stretch-loading of seals
Stuffing box
Subcircuit
Submerged motor
Subordinate control circuit
Suction characteristic
Suction filtering
Suction line
Suction pressure
Suction pressure
Suction pressure control
Suction throttle control
Suction valve
Sum power controller
Sum pressure
Supply of a control unit
Supply pressure
Supply state of hydraulic fluid
Supporting ring
Surface deviation
Surface filter
Surface foam
Surface roughness
Swash plate machine
Swash plate pump
Swelling of sealants
Switch-off pressure
Switch-on characteristic of a solenoid
Switch-on time
Switching
Switching behaviour of devices
Switching capacity of directional valves
Switching characteristics
Switching cycle
Switching element
Switching methods (electric)
Switching methods for hydraulic pumps
Switching overlap in the case of directional valves
Switching position
Switching position monitoring
Switching power
Switching pressure difference (hysteresis)
Switching shock
Switching symbols
switching time
Swivel motor
Swivel screw fitting
Symbols
Synchronizing cylinder
Synchronous control
Synchro rotary position encoder
System-compatible signal
System order
System pressure
Back pressure
Back pressure valve
Back ring
Ball valve
Band pass
Banked valves assembly (monoblock)
Bar
Barometric feedback
Barrier medium seal
Basic
Baud
Bent axis machine
Bernoulli force
Bernoulli’s equation
Beta value (β value)
Binary
Binary characters
Binary circuit element
Binary code
Binary control
Binary counter
Binary data processors
Binary signal
Binary signal processing
Binary system
Bistable (flip flop) valve
Black-white valve (technology)
Bleed filter
Bleeding
Bleed valve (Hy), exhaust valve (PN)
Block diagram
Blocking position
Block stacking assembly
Blow-by effect
Blow-off pressure
Blowing past piston seals
Bode diagram
Bode diagram (frequency characteristics)
Bond graphs
Bottom end of a cylinder
Bounce-free
Bourdon tube
Braking valve
Branch point
Break away friction
Break away pressure
Breather filter
Buckling of rams
Build-up distance of fluid flow pattern
Built-in dirt
Bulk modulus
Bursting pressure
Bus system
Bypass
Bypass arrangement
Bypass filtration
Bypass valve
Magnetic filter
Main valve
Male fitting
Manual adjustment
Manual mode
Materials for seals
Measured signal
Measured value
Measured variable
Measurement data processing
Measurement data processing (conditioning)
Measurement uncertainty
Measuring
Measuring accuracy
Measuring amplifier
Measuring amplifier with carrier frequency
Measuring chain
Measuring converter
Measuring device
Measuring error
Measuring instruments
Measuring procedure (system)
Measuring range
Measuring throttle (metering orifice)
Measuring turbine
Mechanical actuation
Mechanical damping
Mechanical feedback
Mechanical impedance
Mechanical losses
Medium pressure range
Memory capacity
Memory circuits
Metallic seals
Meter out control
Methods of valve installation
MH engine (bent-axis machine)
Micro-emulsion
Micro-filter
Micro-hydraulics
Mineral oils
Mini measuring device (for on-line operation)
Minimum control flow
Minimum cross section for control flow
Minimum pressure
Minor loop
Minutes
Mobile hydraulics
Model of open loop system
Modular control
Modular design
Modular design of control systems
Modular system
Modulation
Module
Monitoring
Monitoring systems
Monitoring systems for hydraulic fluid
Monitoring time
Monostable
Mooring control
Motion diagram
Motor control (closed-loop)
Motor control (open-loop)
Motor slip
Motor stiffness
Mounting dimensions (hole patterns)
Mounting subplate
Mounting wall
Moving coil system
Moving time
Multi-circuit pump
Multi-circuit systems
Multi-computer system
Multi-function valve
Multi-loop feedback control circuits
Multi-media connector
Multi-position controller
Multi-stroke hydrostatic motor
Multibus
Multipass test
Multiple pump
MZ engine (swashplate machine)
A/D converter
Abrasion resistance
Absolute digital measuring system
Absolute filtration rating
Absolute measuring system
Absolute pressure
Absolute pressure gauge
Absolute pressure transducer
Acceleration feedback
Acceleration measurement
Access time
Accumulator
Accumulator, hydraulic
Accumulator charging valve
Accumulator consumption diagram
Accumulator drive
Accumulator losses
Accumulator pressure on temperature change
Accumulator regulations
ACFTD test dust
Acoustic decoupling measures
Acoustic impedance
AC solenoid
Action of multiple resistance
Active sensor
Actual pressure
Actual value
Actuated time
Actuating methods for valves
Actuation
Actuation element
Actuator
Adaptation
Adaptive control
Adaptive controller
Addition point
Additive
Additive (for lubricants)
Address
Addressing modes
Adhesion property of hydraulic fluids
Adhesive joint of pipes
Adjustable displacement pump
Adjustable throttle
Adjustment of displacement machines
Adjustment time
Admittance
Ageing of hydraulic fluids
Ageing of seals
Air Cleaner Fine Test Dust (ACFTD)
Air consumption
Air in oil
Algorithm
Alphanumeric
Alphanumeric coding
Alphanumeric display
Alpha value of filters
Amplifier
Amplifier card
Amplitude margin
Amplitude modulation
Amplitude plot
Amplitude ratio
Amplitude response
Analogue
Analogue computer
Analogue control
Analogue controller
Analogue data acquisition
Analogue measured values
Analogue measuring procedure
Analogue measuring technology
Analogue position measurement
Analogue signal
Analogue signal processing
Analogue technology
Angle encoder
Angle measurement
Angular corner frequency ω E
Anharmonic oscillation
Annular area
Annular gear pump/motor
Annulus volume
Anti-rotation element for cylinders
Apparent dirt holding capacity
Area ratio
Arithmetic logic unit
Arithmetic mean, average
ASCII
ASIC
Asynchronous control
Atmospheric pressure difference
Auto-switching cylinders
Automatic control
Automatic fault detection
Automatic retrim
Automatic sealing
Automatic startup
Auxiliary actuation of valves
Auxiliary power (energy)
Auxiliary signals
Auxiliary variables
Available force
Average torque
Axial gap compensation on gear pumps (so-called gap compensation)
Axial piston machine
Axial piston motor
Axial piston pump
I-block (in control systems)
I controller
Identification of a system
Idle circulation valve
Idling losses
Idling pressure
IEC
Immunity to interference
Impedance Z
Impeller
Impressed flow
Impressed pressure
Impulse actuation of valves
Impulse metering lubricator
Impulse noise
Impulse resistance of hoses
Impulse width modulation
Increment
Incremental angle encoder
Incremental digital measuring system
Incremental encoder
Incremental position encoder
Incremental position measurement
Incremental value (of position or angle)
Incrementing
Indexing accuracy with flow dividers
Indexing ratios when using flow dividers
Indication accuracy
Indication range
Indicator
Indirect actuation
Indirect measuring methods
Individual pressure compensator
Induced pressure
Inductive position measurement
Inductive pressure sensors
Inflatable seals
Influencing the switching time
Inhibitor
Initial contamination
Initial position
Initial pressure difference ΔpA of filters
Initial sealing performance
Initial slope time
Inlet pressure
Input inductance
Input signal
Input signal
Instability of a control system
Instantaneous operating conditions
Instruction
Intake characteristic
Intake height
Integral hydrostatic transmission
Integrated circuit (IC)
Integrated control
Integrated electronics
Integrated position measuring systems
Interfacing controller
Interference response
Intermittent operation
Internal feedback control
Internal fluid admission
Internal gear pump
Internal leakage
Internally piloted valves
Internal power split
Internal pressure
Internal support
Intrinsically safe
ISO
Ultra fine filter
Ultrasonic position measurement
Underlap compensating signal
Underpressure
Unistable
Unloading valve
Usable volume
Utilisation factor
ED
EEPROM (Electronically Erasable Programmable Read Only Memory)
Efficiency
Efficiency of pipe
Elasticity of pressure fluids
Elastic materials
Elastic pipe (bourdon type) pressure measurement devices
Elastomer/energised plastic faced seal
Elastomers
Elbow fitting
Electric-hydraulic analogy
Electric actuation
Electric control power or force
Electric feedback
Electric measurement of mechanical variables
Electric signal processing
Electric signal technology
Electro-hydraulic actuation
Electro-hydraulic control technology
Electro-hydraulic linear amplifier
Electro-hydraulics
Electro-hydraulic systems
Electro-mechanical signal converters
Electro control technology
Electrohydraulic torque amplifier
Electromagnetic compatibility
Electromechanical displacement control of pumps/ motors
Electronic filter
Electronic Flow Sharing
Electronic signal processing
Element for pressure filters
Emergency actuation
Emergency stop
Emulsifying oils
Emulsion
End position damping
Energy content of hydraulic fluid
Energy conversion
Energy losses in hydraulics
Energy recovery in hydraulics
Energy saving in hydraulics
Engine oil as hydraulic fluid
EPROM
Equivalent bulk modulus
Equivalent circuit
Equivalent time constant
Erosion wear
Error
Error-tolerant computer
Error classification in measurements
Error curve of measuring instruments
Error limits of a measuring instrument
Error signal
Errors in a control
Error threshold
Error tolerance
Error tolerance range
European circuit board
Expandable hose
External fluid admission
External gear pump
External piloted valves
External power split
External support
p/Q feedback control
Paper filter
Paraffin base oil
Parallel circuit / connected in parallel
Parallel connection
Parallel processing
Parameter setting
Partial flow filtration
Particle jet erosion
Particle size
Passive sensor
P controller
PD controller
PD element
P element
Performance/weight ratio
Performance map
Period pattern
Phase-frequency response
Phase delay
Phase shift
Phosphate ester
PI controller
PID controller
PID element
PI element
Piezoresistive effect
Piezoresistive pressure sensor
Pilot-controlled valves
Pilot actuation
Pilot control
Pilot control behaviour
Pilot flow rate
Piloting line
Pilot operated valves
Pilot stage for continuously adjustable valves
Pilot valve
Pintle valve
Pipe assembly
Pipe capacity
Pipe impedance
Pipe inductance
Pipe rupture protection
Pipe screw connections
Piping
Piston
Piston area
Piston for rapid traverse
Piston machines
Piston motor
Piston pressure gauge
Piston pump
Piston rings for sealing
Piston rod seal
Piston seal
Piston side volume
Piston type accumulator
Pitot-static tube
Pitot tube
Planetary motor
Plug-in board
Plug-in connection
Plug-in valve
Plug-in valve, 2-way plug-in valve
Plug-in valve, 3-way plug-in valve
Plug amplifier
Plunger
Plunger circuit for fast advance
Plunger piston
Point control
Polyacetal (POM)
Polyamide (PA)
Polymer materials
Polytetrafluoroethylene (PTFE)
Polyurethane (AU, EU)
Port
Port cross-section
Position-dependent control signals
Position-dependent locking process
Position/time diagram
Position diagram
Position error
Position feedback
Positioning error
Positioning error
Position measurement
Position measurement by potentiometer
Position measurement process
Position sensors
Positive-pulse control
Positive displacement principle
Post-cure, overcure
Pour point
Power characteristics
Power characteristics graph
Power controller
Power density
Power gain (amplification)
Power hyperbola
Power input pump
Power limiting
Power loss
Power losses
Power output hydraulic motor
Power pack
Power section
Power split
Power transmission
Pre-charge container
Pre-charged oil tank
Pre-charge of seals
Pre-fill valve
Pre-filter
Pre-load pressure
Pre-load valve
Precision throttle
Predetermined breaking part (predetermined breaking point)
Preheater
Pressure
Pressure-flow (p-Q) control of a pump
Pressure-flow rate (p/Q) characteristic
Pressure-limiting valve
Pressure-proof solenoid
Pressure-reducing valve (pressure control valve)
Pressure-reducing valve, 3-way pressure-reducing valve
Pressure-signal function
Pressure/flow rate diagram
Pressure actuation
Pressure alteration
Pressure alternation process in positive displacement machines
Pressure amplifier
Pressure centring on directional valves
Pressure chamber
Pressure compensator
Pressure control
Pressure control characteristic
Pressure control circuit
Pressure controller for a variable pump
Pressure difference
Pressure drop
Pressure drop-flow rate chart for valves
Pressure feedback
Pressure filter
Pressure flow
Pressure flow characteristic of throttle shapes
Pressure fluctuation
Pressure fluid
Pressure gain on continuously adjustable valves
Pressure gauge
Pressure gauge selection switch
Pressure gradient
Pressure head
Pressure independent flow control
Pressure indicator
Pressure limitation
Pressure loss
Pressure losses due to throttles
Pressure loss in lines (laminar)
Pressure loss through a fitting
Pressure loss through a gap
Pressure loss through an orifice
Pressure measuring procedures
Pressure oscillation
Pressure peak
Pressure positioning range
Pressure pulsation-induced oscillations
Pressure pulsations
Pressure pulse
Pressure ranges in fluid technology
Pressure ratings
Pressure ratio
Pressure ratio valve
Pressure reducing valve
Pressure regulator (zero-stroke regulator)
Pressure rise
Pressure sensor
Pressure stages
Pressure supply circuit with variable pumps
Pressure surge
Pressure switches
Pressure switching valves
Pressure transducer
Pressure valve
Pressure wave
Primary actuation
Primary and secondary control
Primary control
Primary noise control
Primary pressure
Primary valve
Printed circuit board
Priority valve
Process-dependent workflow control
Processing depth
Processing of actual values (or signals)
Profile of contamination
Program
Program carrier (memory, media)
Program execution sequence
Program flowchart
Program library
Program loop
Programmable control
Programmable logic controller (PLC)
Programmed control
Programming
Programming languages
Programming methods
Programming system
Program module
PROM
Propagation of error
Proportional amplifier
Proportional control technology
Proportional solenoid
Proportional valves
Protective filters
Proximity switch
PSI
PT1 - Controller
PT1 - element
PT2 - Controller
PT2 - element
Pulse code modulation
Pulse duration modulation (pulse width modulation)
Pulse generator
Pulse sensor
Pulse shaped control signals
Pulse transformer
Pulse valve
Pulse width modulation
Pump-flow motor
Pump adjustment
Pump control
Pump delivery flow
Pump direction switching
Pump drive
Pump drive capacity
Pump for rapid traverse
Pump idle circulation valve
Pump with banked pistons/in-line piston pump
Calculated pressure
Calculating the sound power
Calibrating throttles
Cam
CAN-BUS
Capacitive position measurement
Capillary tube
Carrier sense multiple access with collision detection (CSMA/CD)
Cascaded (multi loop) control system
Cascaded control
Cavitation
Cavitation erosion
Centralised hydraulic oil supply
Centralised hydraulics
Centre position
Centrifugal pump
Centring by springs
CETOP
Characteristic curve
Characteristic with averaged hysteresis
Charge amplifier
Charge pump
Check valve
Chip
Chlorinated hydrocarbons
Chopper
Churning losses
Circuit diagram
Circuit diagram
Circuit technology
Circular sealing gap
Circulation index U
Circulation losses in hydraulic systems
Circumferential displacement machine
Clamping pressure
Class of accuracy
Cleanliness level
Climatic resistance
Clock signal
Clogging behaviour of orifices
Closed centre system
Closed circuit
Closed circuit position control system
Closed control circuit
Closed loop
Closed loop structure
Closed loop synchronisation control
Closing pressure
Code
Coded rotary encoder
Code translator
Coding
Coil impedance
Cold flow
Collapse pressure
Collective line
Combined actuation
Combined piston
Compact seal
Comparability
Compatibility index for elastomers
Compressibility
Compressibility factor
Compression energy EK
Compression set
Compression volume ΔVK
Computer controls
Computerised numerical control (CNC)
Concentrates
Conditions of comparison
Cone valve
Configure
Conical piston
Constant (fixed) throttle
Constant flow system
Constant force characteristic
Constant pressure system
Constant pump
Contact controls
Contact pressure gauge
Contact ratio t p
Contact seals
Contamination class
Contamination in operation
Contamination measurement
Contamination of the hydraulic fluid
Continuously adjustable flow valve
Continuously adjustable pressure valve
Continuously adjustable valves
Continuous operating conditions
Continuous pressure
Continuous value
Control
Control algorithm
Control amplifier
Control block (valve block)
Control card
Control characteristic
Control command
Control computer
Control concept in fluid technology
Control cylinder
Control deviation
Control devices
Control diagram
Control difference
Control edge geometry of valves
Control electronics
Control equipment
Control error
Control flow rate
Control instruction
Control in the power range
Controlled subsystem
Controller
Controller concepts
Controller for damping (high pass filter)
Controller input variable y R
Controller output variable y R
Controller settings
Controller structures
Controller synthesis
Controller types
Controller with time delay
Controlling in the signalling area (signal flow)
Control memory
Control motor
Control oscillations
Control panel
control parameters
Control plate
Control power
Control pressure
Control program
Control properties
Control range
Control solenoid
Control springs
Control structure
Control surface ratio
Control switch
Control technology
Control throttle
Control unit
Control variable
Control volume for valves
Control with replaceable ROM
Control with throttle
Cooler
Cooling capacity flow
Copying attachment
Copying valve
Corner frequency fE
Corner power
Correcting range
Correcting speed
Correcting variable
Correction of characteristics
Cost of a fluid power plant
Counter flow cooling
Covering plate
Creep feed (speed)
Creeping motion
Cross-section dependent pressure loss
Current-fed system
Current indicator
Cutting ring fitting
Cycle
Cycle frequency
Cylinder
Cylinder efficiency
Cylinder velocity
Hagen-Poiseuille's law
Half open hydraulic circuit
Hall effect sensor
Hamming distance d
Hand pump
Hard-wired controls (VPS)
Hardness of materials for seals
Heat balance in hydraulic systems
Heat dissipation reservoir
HFB fluids
HFC pressure fluids
HFD fluids
Hierarchical control circuit
High pass (filter)
High pressure filter
High response proportional valve
High speed exhaust valve
High speed motors
High torque motors
High Water Based Fluids (HWBF)
HL oils
HLPD oils
HLP oils
Holding current
Holding element
Hole patterns
Hose assemblies
Hose line
Hoses
Hose stretching
Hum
HVLP oils
Hybrid accumulator
Hydraulic accumulator
Hydraulic actuation
Hydraulic axis
Hydraulic braking cylinder
Hydraulic bridge circuit
Hydraulic bridge rectifier
Hydraulic capacity C h
Hydraulic consumer
Hydraulic cylinder
Hydraulic damping (of servomotors)
Hydraulic drive systems
Hydraulic efficiency
Hydraulic fluids
Hydraulic half bridges
Hydraulic inductance L h
Hydraulic intensifier
Hydraulic motor
Hydraulic motors subject to secondary control
Hydraulic piloting stage
Hydraulic power pack
Hydraulic power pack
Hydraulic pump
Hydraulic resonance frequency
Hydraulics
Hydraulic seals
Hydraulic shock
Hydraulic signal technology
Hydraulic spring constant
Hydro-mechanical closed loop control
Hydro-mechanical signal converter
Hydro-mechanical system
Hydrokinetics
Hydromechanical efficiency
Hydropneumatic accumulator
Hydrostatic bearing
Hydrostatic drive
Hydrostatic energy
Hydrostatic laws
Hydrostatic machines
Hydrostatic power P h
Hydrostatic relief
Hydrostatic resistance
Hydrostatics
Hydrostatic servo drive
Hydrostatic traction drive
Hydrostatic transmission
Hydrostatic transmission with separated primary/secondary
Hysteresis
O-ring seal
Oil-in-water emulsion
Oil cooler
Oil heating
Oil hydraulics
Oil sampling
Oil separator
On-off control
On-stroke time of a pump
Onboard-Elektronik
One-way trip
Open-centre position
Open-centre pump control
Open centre system
Open circuit
Open control circuit
Opened control circuit
Opening/closing pressure difference
Opening pressure
Open loop
Open loop control system
Open loop synchronisation control
Operating characteristics
Operating conditions
Operating cycle frequency
Operating defect
Operating life of a filter
Operating loads
Operating manual
Operating mode of a control
Operating modes of drives
Operating parameters
Operating point
Operating pressure
Operating safety
Operating system
Operating viscosity
Operational amplifier
Operation pressure
Optical fibre technology
Optimising the controller
Orbit motor
Orifice
Oscillations
Oscilloscope
Outlet pressure
Output device
Output module
Output unit
Output volume
Over-excitation
Overall control unit
Overlap in valves
Overload protection
Overpressure
Overrun
Overshoot
Overshoot time
Waiting period
Water glycol solution
Water hydraulics
Water in oil
Water in oil emulsion
Wear protection capacity
Welded nipple fitting
Wetting ability
Wheel motor
Word
Word length
Word processor
Working cycle
Working lines
Working positions
Labyrinth gap seal
Labyrinth seal
Laminar flow
Laminar flow resistor
LAN
Laplace transformation
Large signal range
Law of superposition
Leakage, leak
Leakage compensation
Leakage line
Lifetime
Limiting conditions
Limit load control
Limit monitor
Limit pick up
Limit signal
Limit switch
Linear
Linear control signal
Linear control theory
Linearisation
Linearity
Linearity error
Linear motor
Linear regulators
Line filter
Lip seal
Load-holding valve
Load collective
Load flow Q L
Loading models for cylinders
Load pressure compensation
Load pressure difference
Load pressure feedback
Load pressure p L
Load sensing system
Load stiffness
Locking cylinders
Logic control
Logic diagram
Logic element
Loop gain V K
Loop line
Losses in displacement machines
Low-pressure pump
Lowering brake valve
Low pass filter
Low pressure
Naphta based oil
Natural angular frequency ω e
Natural angular frequency ω o
Natural damping
Natural frequency
Natural frequency fo
Natural frequency of a hydraulic cylinder
NBR
Needle-type throttle
Negative-pulse control
Neutralisation number
Neutral position
Neutral position of the pump
Newtonian fluid
Noise
Noise level
Noise level (A-weighted) L pA
Noise level addition
Noise level L p
Noise level L W
Noise level W
Noise measurement
Nominal flow rate
Nominal force of a cylinder
Nominal mode of operation
Nominal operating conditions
Nominal power
Nominal pressure
Nominal size
Nominal valve sizes
Nominal viscosity
Nominal width
Non-contact seals
Non-linear control system
Non-linearity
Non-linear signal transmitter
Normally closed (NC) valve
Normally open valve
Normal pressure
Nozzle
Null-adjustment signal
Null bias
Null bias adjustment
Null drift
Null range of a proportional spool valve
Null shift stability
Value discrete
Valve
Valve-controlled pumps
Valve actuation
Valve assembly systems
Valve block
Valve block design
Valve control spool
Valve control with four edges
Valve dynamics
Valve efficiency
Valve noises
Valve operating characteristics
Valve plate-controlled pumps
Valve polarity
Valve pressure difference
Valve seals
Valve with flat slider
Vane pump
Variable area principle
Variable delivery flow (control)
Variable pump
Variable pump, variable motor
Variable throttle
Velocity amplification
Velocity control
Velocity error
Velocity feedback control circuit
Velocity feedback loop
Velocity measurement
Velocity of sound pressure waves
Vertical column pressure gauge
Vertical stacking assembly
Vibration fatigue limit of a system
Viscosity
Viscosity
Viscosity/pressure characteristic
Viscosity/temperature characteristic
Viscosity classes
Viscosity index (VI)
Viscosity index corrector
Viscosity range
Visual display of contamination
Voltage tolerance for solenoid valves
Volume (bulk) filters
Volume increase on temperature rise
Volume reduction on pressure increase
Volumetric efficiency
Volumetric losses
5-chamber valve
5-way valve
Gap bridging
Gap extrusion
Gap filter
Gap flow
Gap seals
Gas filling pressure
Gauge protection valve
Geared pump/motor
Gear pump
Gear pump flow meter
Gerotor motor
Graduated glass scale
Grooved ring seal
Group signal line
Kinematical viscosity v
Kv factor (speed/stroke gain)
Kv value (of valves)
Quad-ring
Quantisation
Quantisation error
Quasistatic
Quick connector coupling
Quiescent flow
Zero overlap
Jet contraction
Jet pipe amplifier