Simboli idraulici
Simboli generali
| Graphic symbol | Description |
|---|---|
 |
direction of flow and hydraulic agent designation |
 |
direction of flow and pneumatic agent designation |
 |
variable or adjustable (pomp, spring, etc.) |
 |
rotary motion (arrowhead indicates possible direction of rotation) |
 |
line (supply or return) |
 |
line (pilot, drain) |
 |
frame of several components forming a unit |
 |
mechanical element (shaft, lever, piston rod) |
Simboli per componenti di conversione dell’energia
| Graphic symbol | Description |
|---|---|
 |
fixed displacement pump with one direction of low |
 |
fixed displacement pump with two directions of flow |
 |
variable displacement pump with one direction of low |
 |
two-stream pump |
 |
fixed displacement motor with one direction of low |
 |
fixed displacement motor with two directions of low |
 |
variable displacement motor with two directions of low |
Simboli per accumulo di energia
| Graphic symbol | Description |
|---|---|
 |
hydraulic accumulator (vertical position only) |
 |
gas charged hydraulic accumulator |
Simboli dei cilindri idraulici
| Graphic symbol | Description |
|---|---|
 |
single-acting plunger cylinder |
 |
single-acting single rod end cylinder |
 |
single-acting single rod end cylinder with spring-loaded piston return |
 |
double-acting single rod end cylinder |
 |
double-acting single rod end cylinder with left stroke position fixed cushioning |
 |
double-acting single rod end cylinder with both stroke positions adjustable cushioning |
 |
double-acting double rod end cylinder |
Simboli per componenti di controllo della pressione
| Graphic symbol | Description |
|---|---|
 |
pressure relief valve pressure limiting valve (safety or overflow valve) |
Simboli per componenti di controllo della direzione del flusso
| Graphic symbol | Description |
|---|---|
 |
check valve (non-return) |
 |
spring-loaded check valve |
 |
pilot-operated check valve allowable flow direction: A1 → A2 (free flow) A2 → A1 (provided with X pilot signal) |
 |
double pilot-operated check valve (hydraulic lock) allowable flow directions: A1 → A2 and simultaneously B2 → B1 B1 → B2 i and simultaneously A2 → A1 |
 |
shut-off valve |
Simboli per componenti di raccolta, preparazione e condizionamento dell’olio idraulico
| Graphic symbol | Description |
|---|---|
 |
Reservoir/Tank |
 |
Filter |
 |
Cooler |
Simboli per componenti di regolazione della portata
| Graphic symbol | Description |
|---|---|
 |
fixed throttle valve fixed flow restriction independent of medium viscosity |
 |
fixed throttle valve flow restriction depend on medium viscosity |
 |
adjustable throttle valve flow restriction depend on medium viscosity |
 |
throttle check valves |
 |
flow divider |
Simboli per strumenti e indicatori
| Graphic symbol | Description |
|---|---|
 |
pressure indicator |
 |
pressure gauge |
 |
thermometer |
 |
flow meter |
 |
level gauge |
Simboli delle valvole di controllo direzionale – SIMBOLI DI CONTROLLO
| Graphic symbol | Description |
|---|---|
 |
general symbol |
 |
hand lever |
 |
spring |
 |
button |
 |
three-position detent |
 |
solenoid with one coil |
 |
solenoid with two coils acting in opposing directions |
 |
hydraulic control |
 |
proportional hydraulic control |
 |
pneumatic control |
 |
proportional pneumatic control |
Simboli delle valvole di controllo direzionale – SIMBOLI DI POSIZIONE
| Graphic symbol | Description |
|---|---|
 |
two position directional control valve |
 |
three position directional control valve |
 |
two lines connected – open path arrow indicates direction of medium flow (from higher to lower pressure) |
 |
two lines closed – closed path |
 |
three-way valve (examples) |
 |
four-way valve (examples) |