Answer / uttiya hazra

1.The orifice plate can easily be changed to accomodate widely different flow rates, whereas the throat diameter of a venturi is fixed, so that its range of flow rates is circumscribed by the practical limits of Dp.
2.The orifice meter has a large permanent loss of pressure because of the presence of eddies on the downstream side of the orifice-plate; the shape of the venturi meter prevents the formation OS these eddies and greatly reduces the permanent loss.
3.The orifice is cheap and easy to install. The venturi meter is expensive, as it must be carefully proportioned and fabricated. A home made orifice is often entirely satisfactory, whereas a venturi meter is practically always purchased from an instrument dealer.
4.On the other hand, the head lost in the orifice for the same conditions as in the venturi is many times greater. The power lost is proportionally greater, and, when an orifice is inserted in a line carrying fluid continuously over long periods of time, the cost of the power may be out of all proportion to the saving in first cost. Orifices are therefore best used for testing purposes or other cases where the power lost is not a factor, as in steam lines.

Differentiate between ultrasonic flowmeter and radar type flow meter

0 Answers  

---

can u please tell me the different types of valve uses and wt purposes it is used ~!(controlling the flow other than that which valve should be used in what place)

2 Answers  

---

what is Pre- commissioning.

5 Answers   Saipem, Takreer,

---

how we can check level probe and controller

2 Answers  

---

why we are maintain the gap voltage in vibration probe when installing time can explain me?

1 Answers   CIL,

---

what is difference between call out and call log

0 Answers   Petro Rabigh,

---

What is the use of single seated valve?

0 Answers  

---

WHAT IS THE MAIN WORKING OF BOILER.

3 Answers  

---

why 4 to 20 ma? why cant some other range?

3 Answers  

---

what is the way of measuring air flow in air duct?explaim instruments used and DP creation in line?

3 Answers  

---

What pressure transmitter.

1 Answers  

---

Explain the working principle of lvdt?

0 Answers  

---