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Installation Tips for Differential Pressure Transmitters

I’ve had several questions come up in the last couple of days about where to mount differential pressure transmitters in relation to the pipe mounted flow element. There are three different types of fluids that you will want to measure and they require different mounting methods.

 

First, is dry gases. The DP transmitter must be mounted vertically above the pipe taps so that all potential liquid or condensation in the line will drain back into the pipe.

 

Second is liquids. The DP will be mounted vertically below the pipe so that the line will always stay full with liquid.

 

The third is condensing liquids such as steam.

 

These require that the DP transmitter is mounted below the pipe taps, but they must have a vertical water column that is always filled with the same amount of condensate so that the water pressure on the impulse lines remains consistent. The water column will block the high-temperature steam from cooking your transmitter.

 

If you mount it above the pipe and there is no water present, the 300F+ heat will break your transmitter. For more info, contact Jasper Engineering.

Patrick Harlan

Patrick Harlan holds a degree in Biological Systems Engineering from the University of Nebraska – Lincoln and has more than 20 years of experience in industrial process control. Patrick works with customers located in Nebraska, Western Iowa, and Southeast South Dakota specializing in process instrumentation, heat trace and controls valves. Patrick’s approach is to specify products and solutions which will better measure, control and optimize your process. 

If you seek to measure efficiencies, obtain tighter control of processes, and increase plant safety, Patrick welcomes your questions at (402) 440-2325 or PHarlan@JasperEng.com