Orifice plate

Products

Differencial pressure flow meter measurement products and solutions have been used in field for more. And now it is still the most used products in measurement area.Differencial pressure flow meter is widely used in petroleum,chemical,metallurgy,oil&gas,power plant,refining and other industries.

Orifice plate(incl. restriction and pressure drop)
Orifice unions, carriers and metering runs
Integral orifice assemblies
Flow nozzles
Venturi tubes
Wedge meters
Annubar meters
V-cone meters
……

Working principle

In the 18th century, Bernoulli first established the relationship between static and kinetic energy in a flowing stream. As a fluid passes through a restriction, it accelerates, and the energy for this acceleration is obtained from the fluid's static pressure. Consequently, the line pressure drops at the point of constriction.Part of the pressure drop is recovered as the flow returns to the unrestricted pipe. The pressure differentia. developed by the flow element is measured,andnvelocity,volumetric flow and mass flow can all be caculated using the following generalized formulas:

In the formulas:
C--- Discharge Coefficient
β---Diameter ratio
d---Orifice diameter
ε---Coefficient of expansion.
△P-Static pressure
ρ---Fluid density
qm---Fluid mass flow rate

Conditions of use:

Measuring pipe must be circular cross section pipe
Fluid must be full pipe and continuous flow through pipe
Fluid must be single phase fluid
No phase occurs when the fluid flows through the throtting element.
Fluid should be stable flow
Fluid can not have a rotating flow before flowing through the shrottling element