What is the principle behind an orifice plate?
It works on the Differential Pressure Measurement principle. The liquid or gas whose flow rate is to be determined is passed through the orifice plate. This creates a pressure drop across the orifice plate which varies with the flow rate, resulting in a differential pressure between the outlet and inlet segments.
What are the different types of orifice plates?
There are 4 types of Orifice Plates that we will discuss:
- Concentric Orifice Plate (Hole is in the center)
- Eccentric Orifice Plate (Hole is off center)
- Segmental Orifice Plate.
- Others – such as Conical and Quadrant, and Edged Entrance types.
How many types of orifice plates are there?
Orifice Plate Pressure Taps. There are 6 types of pressure taps that can be used on pipes in conjunction with orifice plates. They are used to allow the transmitter to tap into the pipe to measure the high and low pressure sides of the flow.
What is orifice meter used for?
Orifice meter: is a device used for measuring the rate of flow of a fluid flowing through a pipe.
Why are orifice plates used?
An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a restriction plate ).
What is large orifice?
According to the classification of the shape of the orifice, If the head of the liquid from the centre of the orifice is less than five times the depth orifice, then it is known as the large orifice. And if the head of the liquid is more than five times the depth, it is known as the small orifice.
What is the maximum DP for an orifice plate?
In principle, 10:1 to 14:1 flow rangeability and 100:1 to 200:1 DP turndown is the maximum limit while selecting a single Orifice plate as a Flow element.
How is orifice plate sizing for flow measurements?
Sizing an Orifice Plate for Flow Measurements Any system that deals with the transportation of fluids must be very aware of the rate at which the fluid is traveling. This measurement is either a volume flow rate with units like meters^3 per second or gallons per minute.
When does fluid converge to the orifice plate?
When the fluid reaches the orifice plate, with the hole in the middle, the fluid is forced to converge to go through the small hole; the point of maximum convergence actually occurs shortly downstream of the physical orifice, at the so-called vena contracta point (see drawing to the right). As it does so, the velocity and the pressure changes.
Is the orifice plate an easy to use device?
The Orifice plate is a very robust flow measurement device. It is one device that is very easy to use and can easily be adaptable to many flow measurement applications. Its cost of operation is minimal and familiarity with the device is near universal.
What are the principles of the orifice meter?
Orifice Sizing Principles An orifice meter is a device used for measuring the rate of fluid flow. It uses the same principle as a Venturi nozzle, namely Bernoulli’s principle which says that there is a relationship between the pressure of the fluid and the velocity of the fluid. When the velocity increases, the pressure decreases and vice versa.