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What is Integral Flow Orifice Assembly?

 Integral Flow Orifice Assembly is used when Differential Pressure Transmitter has to be directly mounted on the orifice assembly. This eliminates the cost of installation of Differential Pressure Transmitter with impulse piping up to the orifice assembly.

Integral Flow Orifice Assembly


The transmitter is mounted on the orifice assembly through a 3/5 Valve H-type manifold. Available with line sizes of 2″ & below. However, due to the process temperature limits of the transmitter, this assembly cannot be used tor process temperatures above 120 degrees Centigrade.

The assembly consists of an orifice plate between two integral blocks having corner taps. Generally, a meter run pipe is recommended with the upstream length of 750mm and downstream length 0‘ 250mm. The pipes are welded to the blocks with end flanges.

Advantages of Integral Meter run assembly:
The use of an integral orifice flow meter will eliminate the three measurement inaccuracies recorded in small orifice line installations.

The Integral Orifice honed body reduces ID uncertainty.

By inserting precision bored upstream and downstream sections of pipe, the velocity profile distortion due to pipe roughness is reduced.

The self-centering design of the Integral Orifice Plate eliminates plate misalignment.
Improves Reliability and Maintenance Costs
The integral orifice flow meter eliminates impulse lines, reducing leak points by over 50% and decrease start-up time due to the flexibility of numerous process connection options. The direct mount design minimizes line plugging by eliminating long lines, small-bore ports, and services while providing consistently reliable installations.

*Accuracy up to ±0.5% of the volumetric flow rate.
*The integral manifold head allows direct mounting of DP transmitters.
*Ideal fluid types: liquid, gas, and steam
Integral Orifice Assembly with flange union, manifold valve, DP transmitter & end flanges
Meter runs are supplied as a complete unit of normally 1M length to ensure the necessary straight pipe length to achieve the highest possible efficiency.

These are available with line sizes mostly below 50mm with a corner tap.

These are used for the measurement of small flow rates precisely where high accuracy of flow rates is required.

Types of Meter Runs:
1.Orifice Flange union with Meter -run.
2.Orifice flange union with Carrier ring & Meter –run.
End Connection: Socket Weld, Screwed and Flanged ends with meter run piping suitable to ANSI, IS & DIN flanges.


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