The document discusses hydraulic symbols according to ISO 1219 standards, including symbols for hydraulic pumps and motors, actuators like cylinders, directional control valves, pressure control valves, flow control valves, check valves, and other accessories. It provides information on the functions of different hydraulic components like pumps converting mechanical to hydraulic energy, motors converting hydraulic to mechanical rotation, cylinders providing linear motion, and various valve types controlling direction, pressure, and flow within hydraulic circuits.

1. HYDRAULIC SYMBOLS As per DIN-ISO 1219 (1978) As per ISO – 1219-1 (1991)

2. Simple Hydraulic Circuit

3. Symbols of Hydraulic Pumps & Motors Hydraulic Actuators Directional Control Valves Pressure Control Valves Flow Control Valves Check Valves Accessories

4. Pumps and Motors Function Pump: Conversion of Mechanical to Hydraulic Energy Hydraulic Motor: Conversion of Hydraulic Energy in to Mechanical Energy of Rotation

6. Fixed & Variable Displacement Pumps

7. Pump Actuation With Electric Motor

8. Fixed & Variable Displacement Motors

9. Hydraulic Actuators Function Hydraulic Motor: Conversion of Hydraulic Energy in to Mechanical Energy of Rotation Hydraulic Cylinder: Conversion of Hydraulic Energy in to Mechanical in the Form of Linear Motion

10. Hydraulic Cylinders

11. Direction Control Valves Function Open or Close Various Flow Paths Designated by number of ports & Switching Positions Ex. 4/3 DC Valve

13. 4/3 Direction Control Valve

16. Direction Control Valves

17. DC Valve Switching Mechanism

18. Central Positions

19. Pilot Operated DC Valve

20. Pressure Control Valves Function To Control Pressure in the system Protects the system from high pressure

21. Pressure Relief Valve

23. Pressure Relief Valve

24. Pressure Reducing Valve

25. Sequence Valve

26. Flow Control Valves Function To regulate Volumetric Flow Rate

27. Throttle Valve

29. Flow Control Valves

30. Application of FCV

31. Check Valve Function Allows flow only in one Direction

32. Check Valve

33. Accessories

34. Questions?

35. Thank You