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November 2008
6.1
HYDRAULIC SYMBOLS
MOTORS
Fixed motor with one
direction of flow
Fixed motor with two
directions of flow
Variable motor with two
directions of flow
Reversible fixed motor with
two directions of flow
PUMP
Fixed displacement pump
with one direction of flow
Fixed displacement pump
with two directions of flow
Variable displacement pump
with one direction of flow
Variable displacement pump
with flow regulator
CYLINDERS
Single-acting cylinder
Single-acting cylinder
with spring return
Double-acting cylinder
Double-acting cylinder
with bilateral rod
Telescopic cylinder
COMMANDS AND CONTROLS
Shaft rotating in one direction
Shaft rotating in two directions
Hand-operated control
Hand-operated control
with pushbutton
Hand-operated control
with lever
Hand-operated control
with pedal
Mechanical control
with pushbutton
Mechanical control
with spring
Document 57.0009.0427
Mechanical control
with roller
Electro-magnetic control
with winding (solendoid)
Control with electric
M
motor
Direct pressure control
Indirect (piloted) pressure
control
Control with electromagnet
and piloted distributor
PIPES AND CONNECTIONS
Induction and return pipe
Piloting pipe
Blow-by pipe
Flexible hose
Connecting point
Pipe cross
without connection
Breather
Closed pressure fitting
Pressure fitting with
connected pipe
Quick fitting
Quick fitting with check
valves
DISTRIBUTION - SETTING
ELEMENTS
Non-return valve
Calibrated non-return valve
Unlockable non-return
valve
GTH-4017EX GTH-4514EX GTH-4013EX
Section 6 - Schemes
Schemes
Combined non-return
and throttle valve
Switching valve
Pressure relief valve
with direct control
Pressure relief valve
with hydraulic control
Pressure reducing
valve
Sequence valve
Adjustable throttle
valve
Two-way flow
regulator
Cut-out cock
POWER SOURCES
Electric motor
M
Thermal engine
OTHER EQUIPMENT
Accumulator
Water tank
Compressor
Filter
Cooler
Pressure gauge
Thermometer
Flowmeter
Pressure switch
Drain to tank
indication
1
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