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Measurement Of Pressure - AISSMS Polytechnic

Manometers are used for measuring pressures by balancing the fluid column of fluid against another column of fluid of known specific gravity. Here is the well explained PPT by Rajesh D. Bhosale from AISSMS Polytechnic which is best poly college in Pune.<br>Website - https://aissmspoly.org.in/

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Measurement Of Pressure - AISSMS Polytechnic

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  1. MEASUREMENT OF PRESSURE Rajesh D. Bhosale (Lecturer, Department of Mechanical Engineering , AISSMS polytechnic , Pune)

  2. Manometers Manometers are used for measuring pressures by balancing the fluid column of fluid against another column of fluid of known specific gravity. • Manometers can be classified as: • Simple Manometer • Differential Manometer

  3. Manometers • Simple Manometers Simple monometers consists of glass tube having one of its end connected to a point where pressure is to be measured and other end is open toatmosphere. • Types of Simple manometersare:1)Piezometer2) U-tube manometer3) Single column manometer

  4. Piezometer • It consists of a glass tube inserted in the wall of the vessel or pipe at the level of point at which the intensity of pressure is to be measured as shown in Fig. • The other end of the piezometer is exposed to air. • The height of the liquid in the piezometer gives the pressure head from which the intensity of pressure can be calculated.

  5. U- tube Manometer • A U-tube manometer consists of a glass tube bent in U-Shape, one end of which is connected to the point at which pressure is to be measured and the other end is exposed to atmosphere. • U-tube consists of a liquid of specific of gravity is greater than the specific gravity of the liquid whose pressure intensity is to be measured.

  6. Differential Manometers • Differential manometers are used to measure the difference of pressures between two points in a pipe or in two different pipes • Types of differential manometers are: • Simple U-tube Differential manometers • Inverted U-tube differential manometers

  7. Simple U-Tube Differential Manometers The two points A and B are at different level and also contained liquids of different specific gravity. These points are connected to the U-tube manometer. Let the pressure at A and B are PA and PB.

  8. Inverted U-Tube Differential Manometer • It consists of an inverted U-tube having two ends are connected to the pipes at points A and B whose difference of pressure is to be measured as shown in Fig. • It is used for measuring the difference of low pressures. Let the pressure at A is more than the pressure at B.

  9. Advantages, Disadvantages and Applications Advantages: • Simple in construction • Low cost hence easy to buy. • Very accurate and sensitive • It can be used to measure other process variables. Disadvantages : • Fragile in construction. • Very sensitive to temperature changes Applications: • It is used for low range pressure measurements. • Extensively used in laboratories. • Is used in Orifice meter and Venturi-meter for flow measurements. • It is used for calibration of gauges and other instruments. • It is used for measuring pressure drop in different joints and valves.

  10. Get in Touch • AISSMS PolytechnicKennedy Road, Near R.T.O.,Pune - 411 001, Maharashtra (INDIA) • www.aissmspoly.org.in Thank You…! • / AISSMS_POLY

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