Orifice Plates

ORIFICE PLATES

Orifice Plates are most commonly used primary elements for flow measurement in pipelines based on the principle of measurement of ‘Differential Pressure’ created when an obstruction is placed in the fluid flow, due to increase in fluid velocity.

Orifice Plates cover a wide range of applications of fluid and operating conditions. They give an acceptable level of uncertainties at lowest cost and long life without regular maintenance.

We have fully equipped integrated designing, manufacturing and testing facilities which are amongst the best in the Country. Over the years we have manufactured and supplied Orifice Plates Assemblies to many prestigious projects in the Domestic as well as International market.

The Square Edged Concentric type of Orifice Plate is most commonly used for flow measurement. This has got features such as simple structure, high accuracy, and ease of installation & replacement. The Orifice Plates are correctly finished to the dimensions, surface roughness, and flatness to the applicable standard. These plates are recommended for clean Liquids, Gases & Steam flow, when the Reynolds number range from 10000 to 10.

We also manufacture Eccentric Orifice Plates, Segmental Orifice Plates, Quadrant Edge Orifice Plates, Conical Entrance Orifice Plates.

RESTRICTION ORIFICE PLATES

The Restriction Orifice Plates are used for reducing fluid pressure and are designed somewhat different from the Orifice Plates that are used for measuring flow rates. They are designed to slip between the piping flanges.

While single Restriction Orifice are often sufficient to meet the requirement, there are situations where limitations arise due to process conditions making the single Restriction Orifice unacceptable. In such situations, use of Multiple Restriction in series is a better soltion.

The foremost consideration in using Multiple Restriction is the pressure drop. Higher pressure drop implies higher velocities resulting in vibration and noise problems. Hence instead of a Single Restrction Orifice Plate, Multiple Plates are used.

The other consideration, particularly for gas flow is that if the process condition indicates that critical flow will occur with the use of single restriction plate, care should be exercised to avoid operating well beyond the critical pressure drop.

Construction of Multistage Orifice Assembly is as shown in the adjoining sketch. End connection is either suitable for butt welding or with end flanges.