Hydraulic symbols for Marine Engineering

Hydraulic symbols

1. HYDRAULIC SYMBOLS
Basic Symbols Representing Hydraulic Components

2. 2Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
RESERVOIRS

3. 3Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
INTRODUCTION
The secret to being successful at reading and interpreting a schematic for a hydraulic system is really quite
simple. Very often, you will forget that the symbols on schematics are really a completely different
language of pictographs (picture used to represent the component). As you read this slide and begin to
study the symbols inside, go to the extra effort to try and figure out why the symbols are drawn as they are.
If you think about it, pumps will look like what pumps do, and all of the other symbols will come
close to looking like what they are intended to be.

4. 4Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC LINES, TUBES & HOSES

5. 5Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC LINES, TUBES & HOSES (CONTINUED)

6. 6Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
PUMPS

7. 7Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC MOTORS

8. 8Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC CYLINDERS

9. 9Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC CYLINDERS (CONTINUED)

10. 10Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HOW VALVES ARE ACTUATED

11. 11Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
PRESSURE CONTROL SYMBOLS

12. 12Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
PRESSURE RELIEF VALVE

13. 13Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
DIRECTIONAL CONTROL VALVES

14. 14Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
FLOW CONTROL

15. 15Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
FLUID CONDITIONING MECHANISMS AND SYMBOLS

16. 16Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
ACCUMULATORS

17. 17Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
HYDRAULIC SYSTEM COMPONENTS

18. 18Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
TYPICAL HYDRAULIC CIRCUIT

19. 19Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
WINCHES

20. 20Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023

21. 21Unit 10: Hydraulic & Pneumatic Abu Dhabi Maritime Academy (ADMA) ADSMO/ MZI/V1.1/ Oct 2023
CRANE