Venturi Meter vs. Orifice Meter: A Detailed Comparison

This article explores the differences between two common types of differential pressure flow meters: the Venturi meter and the Orifice meter. These devices, along with flow nozzles, are used to measure fluid flow by creating a pressure difference within the flow path.

Essentially, these meters work by introducing a restriction in the fluid’s path. This restriction causes a pressure drop, and by measuring this pressure difference, we can determine the flow rate.

Let’s take a closer look at each meter individually:

Venturi Meter

• Function: A Venturi meter is primarily used to measure the discharge, or flow rate, through a pipe.
• Principle: It operates based on Bernoulli’s principle, which relates the pressure, velocity, and height of a fluid.
• Installation: Venturi meters can be installed in various positions - vertical, horizontal, or inclined, making them versatile.
• Specification: They are typically specified by their inlet diameter and throat diameter.

Orifice Meter

• Function: An Orifice meter is used to measure the volumetric flow rate of a fluid.
• Principle: Like the Venturi meter, it also utilizes Bernoulli’s principle.

Key Differences: Venturi Meter vs. Orifice Meter

Here’s a summary of the key differences between the two meters: