Orifice Meter Experiment test

ORIFICE METER APPARATUS 

◼️Aim:

    To determine the co- efficient of discharge of orifice meter.

◼️ Apparatus:

     1. Measuring tank to measure the flow rate.

     2. A pipe line with an orifice meter.

     3. Gate valves are provided at inlet & outlet of orifice meter and these are connected to manometer.

     4. A constant steady supply of water with a means of varying the flow rate using monoblock pump.

◼️ Theory:

     An orifice meter is a semple divice used for measuring the discharge through pipes, orifice meter also work on the some principal as that of venturimeter i.e, by reducing the cross-sectional area of the flow passage, a pressure difference between the two section before and after orifice meter is developed and the measurement of the pressure difference enables that determination of the discharge through the pipe. However, orifice meter is a cheaper arrangment for discharge measurement through pipe and it's installation requires a smaller length as compared to with Venturi meter. As such where may be used for the measurement of discharge through pipes.

◼️ Specifications:

◾ Area of measuring tank,  ‘A’ = 0.3×0.3 = 0.09m²

◾ Acceleration due to gravity, ‘g' = 9.81m/sec²

◾Diameter of orifice meter, ‘d’ = 12.5 mm

◾ Diameter of inlet pipe, ‘D' = 25 mm

◼️ Operating Instructions & Experimental Procedures:

    All the necessary instrumentations along with it's accessories are readily connected. It is just enough to follow the instructions below:

1. Fill the samp tank with the clean water.

2. Keep the delivery valves closed.

3. Connected power connection to 1ph, 220v, 10amps.

4. Switch on the pump & open the delivery valves.

5. Open the inlet gate valves of the orifice meter.

6. Adjust the flow through the control valves of the pump.

7. Note down the differential head reading in the manometer ( Expel if any air three by opening the drain cocks provided with the manometer)

8. Operate the pvc ball valve to note down the collecting tank reading against the known time and keep it open when the reading are not taken.

9. Change the flow rate & repeat the experiment.