2/6/24, 11:28 PM Hydraulics Pneumatics Symbols Mechanical Engg Simple Notes ,Solved problems and Videos Learn at your pace and time Home » Industrial Hydraulics & Pneumatics » Introduction to Hydraulics and Pneumatics Hydraulics Pneumatics Symbols Hydraulics Pneumatics Symbols Hydraulics pneumatics symbols play very important role in design and implementation of the systems. These symbols designate the components and way they should be interconnected. WIthout hydraulics pneumatics symbols it would have very difficult to represent and express a hydraulic circuit. Hydraulics pneumatic symbols are grouped in different groups as Energy conversion elements, Hydraulics cylinders, Energy transmitting elements,Fluid storage elements, Flow control valves, Direction control valves, check valves, Fluid conditioning elements, pressure control valve and accesories. A family of various graphical symbols have beed developed to represent the different hydraulic components and systems. Two main symbol sets ANSI and ISo are used. But we follow the universally accepted ISO symbols. Following table depicts the various hydraulics pneumatics symbols which are ISO symbols used worldwide. https://mechdiploma.com/hydraulics-pneumatics-symbols 1/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 2/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 3/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 4/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 5/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 6/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 7/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 8/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 9/13 2/6/24, 11:28 PM https://mechdiploma.com/hydraulics-pneumatics-symbols Hydraulics Pneumatics Symbols 10/13 2/6/24, 11:28 PM Hydraulics Pneumatics Symbols The above symbols are as per ISO. If there is no standard symbol for a component one must be made and clearly mentioned. The above diagrams cover both hydraulic and pneumatic symbols. A circuit diagram is the combined diagram showing components and their interconnections. Hazard and safety in hydraulics HAZARDS: https://mechdiploma.com/hydraulics-pneumatics-symbols 11/13 2/6/24, 11:28 PM Hydraulics Pneumatics Symbols Hydraulic equipments and systems are designed to accomplish work using confined liquid pressure to produce a greater mechanical force. The operators/ maintenance crews are subjected to hazards from high pressure liquids and large mechanical forces. Hydraulic systems store fluid under high pressure. The workmen are exposed to following hazards: burns from hot, high-pressure fluid Injection of fluid into the skin Fire Hazards bruises, cuts or abrasions from flailing hydraulic lines Injury of people due to unexpected movement of equipment. During maintenance of equipment and their parts. Injury due to sudden release of residual pressurized oil. Slippage due to oily floor area. SAFETY 1. Positive isolation procedure to be followed before start of any hydraulic work. 2. Depressurize the system before start of work. Shut down/ Local Isolation may be taken, if required. 3. Never begin work on a hydraulic/pneumatic system until fully trained. 4. Never begin work on a hydraulic/pneumatic system without using a risk assessment. https://mechdiploma.com/hydraulics-pneumatics-symbols 12/13 2/6/24, 11:28 PM Hydraulics Pneumatics Symbols 5. Carefully review the manuals on equipments before beginning work. Ask questions about anything you do not fully understand. 6. Use all required safety Equipments like gloves,masks etc. 7. Never try to repair a part without having full knowledge about it. 8. Each hydraulic system must have a documented procedure of de-energizing and load locking. This should be known to all maintenance personnel. 9. Document and practice de-pressurizing procedure in each of the circuit. 10. While testing the system after repair never stand close to the unit. Any component, pipe, hose, fitting may fail. 11. Tightening of Joints should be done in depressurized condition. Link to main chapter http://www.mechdiploma.com/introduction-hydraulics-and-pneumatics ‹ Hydraulic oil properties up Pumps and Actuators › Log in to post comments https://mechdiploma.com/hydraulics-pneumatics-symbols 13/13