Hydraulic symbols - Pumps, Motors, Cylinders, and Valves

Oct 23, 2026

Hydraulic symbols P001-2/E provides a structured reference for common hydraulic components and their schematic representations. It covers pumps (fixed and variable displacement, hand pumps), motors (fixed/variable displacement and rotary actuators), and cylinders (single-acting, double-acting, cushioned stroke ends, telescopic). It also summarizes pressure control valves, flow control valves, and directional control valves with variants like check valves and multi-position spool types, plus key energy transmission accessories such as piping connections, reservoirs, sensors, accumulators, filters, heat exchangers, gauges, and switches.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages2

Reading Time5 min

AccessFree to download

Hydraulic symbols

Pumps

Motors

Cylinders

Pressure control valves

Flow control valves

Directional control valves

Energy transmission and accessories

Table P001-2/E Hydraulic symbols PUMPS | Graphic symbol | | Item | Description | | --- | --- | --- | --- | | (a)

| (b)

| Fixed displacement pump | One flow direction (a) | | | | | Two flow directions (b) | | (a)

| (b)

| Variable displacement pump | One flow direction (a) | | | | | Two flow directions (b) | | | | Hand pump | Lever pumping | MOTORS | Graphic symbol | | | | | Item | Description | | --- | --- | --- | --- | --- | --- | --- | | (a) |
| (b) | | | Fixed displacement motor | One rotation direction (a) | | | | | | | | Two rotation directions (b) | | (a)

| | (b)

| | | Variable displacement motor | One rotation direction (a) | | | | | | | | Two rotation directions (b) | | | | | | | Rotary actuator | Hydraulic motor with limited angle of rotation | CYLINDERS | Graphic symbol | | | | Item | Description | | --- | --- | --- | --- | --- | --- | | (a) | | (b) | | Single-acting cylinder | Return stroke by external force (a) | | | | | | | Return stroke through a spring (b) | | (a) (b)

| | | | Double-acting cylinder | Single rod (a) | | | | | | | Double rod (b) | | (a) | | (b) | | Cylinder with fixed
stroke end cushioning | Cushioning on one side (a) | | | | | | | Cushioning on both sides (b) | | (a) | | (b) | | Cylinder with adjustable stroke end cushioning | Cushioning on one side with adjustment (a) | | | | | | | Cushioning on both side with adjustment (b) | | (a) | | (b) | | Telescopic cylinder | Single-acting (a) | | | | | | | Double-acting (b) | PRESSURE CONTROL VALVES | | Pressure relief valve
Direct operated Pilot operated | | | Sequence valve | | | | | --- | --- | --- | --- | --- | --- | --- | --- | | | | | | | Direct operated | Pilot operated | | | | Pressure reducing valve | | | Counterpressure valve
| | | | | | Direct operated | Pilot operated | | | | | | FLOW CONTROL VALVES | Variable throttling valve | | | Compensated flow regulator | | | --- | --- | --- | --- | --- | | | Two way | With check | Two-way | Three-way | DIRECTIONAL CONTROL VALVES | Check valves | | | | | | --- | --- | --- | --- | --- | | without spring | | With spring, normally closed | Piloted operated | Piloted with drain | | | | | | | | | | Directional valves (spool type) | | | | 2 ways-2 positions | | 3 ways-2 positions | 4 ways-2 positions | 4 ways-3 positions | | | | Controls for directional valves | | | | Detent | | Pushbutton | Lever | Adjustable stroke limiter | | Spring | | Cam | Electric (solenoid) | Electro-hydraulic | | Pneumatic | | Hydraulic | Electric (proportional) | Electro-hydraulic (proportional) | ENERGY TRANSMISSION AND ACCESSORIES | Graphic symbol | Item | Description | | --- | --- | --- | | | Motor | Electric | | | | Engine | | | Pipings and
connections | Main | | | | Pilot | | | | Drain | | | | Flexible hose | | | | Connection point | | | | Crossing | | | Branching | Closed | | | | With connected piping | | | Coupling | Fast coupling | | | | With check valves | | Graphic symbol | Item | Description | | --- | --- | --- | | | Reservoir | Pipings above level | | | | Pipings under level | | | | Pressurized reservoir | | (a) (b) | Spool position sensor on-off | Mechanical microswitch (a) | | | | Inductive proximity sensor (b) | | | Hydraulic
accumulator | | | | Filter | | | | Heat exchanger | Heater | | | | Cooler | | | | Liquid operated cooler | | | Pressure gauge | | | | Pressure switch | | | | Rotating shaft | 1 direction | | | | 2 directions |

FAQs

What hydraulic pump types are shown in the reference?

The reference includes fixed displacement pumps, variable displacement pumps, and hand pumps, each described by flow-direction graphic symbol variants.

Which motor symbols are covered?

It covers fixed displacement motors, variable displacement motors, and a rotary actuator defined as a hydraulic motor with limited rotation angle, including one- and two-direction rotation variants.

What valve categories are included?

The document lists pressure relief and reducing valves, sequence-related valves, pressure and counterpressure options, flow control valves such as variable throttling and compensated regulators, and directional control valves including check valves and spool-type multi-position valves.

Oct 23, 2026

Uploaded by putri.kecil17