1. 1. Introduction Presented By: Syed Misbah Ullah M13-CE53
2. 2. Orifice flow meter Table of contents Applications Advantages Disadvantages
3. 3. Orifice flow meter
4. 4. Definition A device which is used to measure flow rate It is conduit or restriction to create pressure drop. Used for all fluids
5. 5. Laboratory pic of Orifice meter
6. 6. Applications It is used for close system An orifice plate can be use to measure the flow of Gases Liquids
7. 7. Applications Gases:- Small dia orifice plate is used for gases because Gases are compressible fluid
8. 8. Applications Liquids:- Large dia Orifice Plate is used for liquids Because liquids are incompressible
9. 9. Applications animation
10. 10. Advantages Simplest Structure. Relatively Cheap.
11. 11. Advantages Occupies less space and installation is easy.
12. 12. Advantages For fluids containing solid particles an eccentric or segmental orifice can be used.
13. 13. Advantages Measuring range can be changed easily
14. 14. Advantages Flow rate is proportional to pressure drop = Q= Flow rate K= A constant value, which is determined by orifice size and types of the fluid del= Change P= differential pressure across the orifice plate
15. 15. Disadvantages Pressure recovery is poor, thus resulting power loss is more. It maximizes form friction (Friction within the layers of fluids) Value of Coefficient of discharge is less. It's value is 0.62 to 0.68
16. 16. Disadvantages Coefficient of discharge CD= =0.62 to 0.68 (Which mean high losses) Area of vena contracta has to be calculated
17. 17. Disadvantages In gas applications in order to be accurate, it requires constant Pressure temperature
18. 18. Conclusion o flow sensor which is used throughout the World is the Orifice flow meter due to Its simple structure, Easy to install, and Inexpensive nature
19. 19. Syed Misbah Ullah Mob=+923068520193 Institute of Chemical Engineering & Technology Punjab University Lahore