Lab 4 Series and Parallel Circuits with data

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Apr 3, 2024

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Industrial Hydraulics for Colleges Industrial Hydraulics for Colleges Lab 3 Lab 3 College Course Title: Lab Title: Series and Parallel Circuits Student Name: Section Number: Instructor: Paul Bligdon College Credits: Paul Bligdon Page 1
Industrial Hydraulics for Colleges Industrial Hydraulics for Colleges Lab 3 Lab 3 Lab Exercise 2a Series Circuit When the resistances (components) in a hydraulic circuit are connected in such a way that only allows a single flow path from the pump through the remainder of the circuit as the fluid returns back to tank, the components are said to be connected in series with each other . The resistance created by each component in the fluids flow path accumulates creating a total resistance to flow as seen on the pressure gauge at the pump’s outlet. This pressure gauge is referred to as the system’s pressure gauge (PG main). A pressure gauges may be placed before each component and would indicate the pressure required to push the fluid through that individual component and any additional components downstream of it. The highest pressure in the circuit is always seen at the pump’s outlet. See the example illustration below: College Credits: Paul Bligdon Page 2
Industrial Hydraulics for Colleges Industrial Hydraulics for Colleges Lab 3 Lab 3 Learning Outcomes Work in compliance with the Ontario //Health and Safety Act and the College’s Safety Standards during the performance of the lab exercise. Follow written technical instructions to perform work tasks Using standard ANSI symbols, sketch the schematic diagram of the lab’s hydraulic circuit Identify that pressure is proportional to resistance downstream of the pump Identify that the flow rate remains a constant as resistance increases in a series circuit Identify that the flow rate in a parallel circuit divides proportional to the resistance in each leg of the circuit Identify the hydraulic components used in both a series and parallel circuit Using Auto Cad, draw the schematic diagram of the lab’s hydraulic circuit. Troubleshoot circuit operation as required Procedure 1a: Setting the Relief Valve Note: The relief valve can be adjusted and set without any additional circuitry being connected on the bench 1. Ensure that the PDP panel is in the “off” position and the Emergency Stop Button is “depressed” before proceeding 2. Ensure that the Vent Shut-off Handle (yellow) is in its horizontal position. (zero pressure) 3. Turn the Relief Valves Adjustment Knob fully counter clockwise. (lowest spring setting) 4. Release the Emergency Stop Button 5. Following the learned safety procedure, turn the PNP panel’s switch to the “ON” position 6. Depress the Training Benches’ Start Push Button (|green) 7. Record the pressure indicated on the System’s Main Pressure Gauge (PGM) 0 PSI . 8. Turn the Vent Shut-off Handle (yellow) to its vertical position (maximum pressure) 9. Slowly turn the Relief Valve’s Adjusting Knob clockwise. College Credits: Paul Bligdon Page 3
Industrial Hydraulics for Colleges Industrial Hydraulics for Colleges Lab 3 Lab 3 10. Set the relief valve to its maximum setting based on the bench’s component configuration PSI = . 11. Turn the Vent Shut-off Handle to the horizontal position 12. Record the pressure seen on PGM. 0 psi 13. Depress the Training Benches Motor Stop Button (red) 14. Depress the Emergency Stop Button 15. Turn the PDP switch to the Off position Procedure 2a: Assembling the series circuit 1. Ensure that the PDP panel is in the “off” position and the Emergency Stop Button is “depressed” before proceeding to assemble your circuit. 2. Using the ANSI schematic circuit as a guide, connect the circuit on the training bench. Remember; the Power Unit components are permanently configured and connected, therefore only the “Backboard” components beginning at the pressure manifold need to be connected by you College Credits: Paul Bligdon Page 4 Orifice 2 PG 3 FM 1 Orifice 1 PG 2 PG 1 1500 psi 4 gpm
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