Home » Wedge Flow Meter Principle
Flow Measurement

Wedge Flow Meter Principle

A Wedge Flow Meter is preferably applied in difficult-to-meter line fluids, like air entrained liquids, particular entrained liquids, high viscous liquids or slurry liquids, which are abrasive or fibrous.

It is also applicable for clean liquids, gas/air and steam. It consists of a measurement pipe with pressure taps in front and behind the flow element, a wedge restriction being welded into the measurement pipe from the top side.

The pressure is being measured in front of the wedge (high or dynamic pressure side) and behind the wedge (static or low pressure side). By determining the difference of these two measurements, which is called the differential pressure, the volume flow of the fluid can be calculated, as all other characteristics of the measuring points are constant.

Wedge Flow Meter

Wedge Flow Meter

As the wedge has the profile of an isosceles triangle, the form is the same from both sides. So the measurement is possible in both directions.

The line fluid is forced downward similar to a segmental orifice plate, but is guided along a slopping “wedge” shape rather than a sharp edge. The pressure taps are located upstream and downstream of the wedge and in all cases are equipped with sealed sensors.

The differential pressure produced by the device is a function of the wedge segment opening (H) and the diameter of the body, “D” values as shown in below figure.

The calculations for compressible flow are similar but must take account to temperature and adiabatic expansion and compressibility factors.

Solids and other debris easily pass under the restriction of the wedge meter. The inherent ruggedness of the restriction resists damage to its measuring edge.

Articles You May Like :

DP Transmitter Interface Level

Types of Vortex Flow Sensors

Field Instrumentation Questions

3-15 psi to 4-20mA Conversion

Why Turndown Ratio is important ?

Related Articles

Why Orifice Flow Meter Flange is not Recommended 150# Rating ?

S Bharadwaj Reddy

Laminar Flow Meter Working Principle

S Bharadwaj Reddy

Multiphase Flow Meter Working Principle

S Bharadwaj Reddy

Coriolis Flow Meter Construction

S Bharadwaj Reddy

What is Variable Area Flow Meter ?

S Bharadwaj Reddy

Flow Transmitter Rangeability

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Wedge Flow Meter Principle

WordPress Image Lightbox

Send this to a friend