Recent content by Dave

varatha your pressure units are most likely "inches water column", as few flow meters are design to tolerate 50/150 psi pressure differentials.

You need to test your pressure devices.

As CSA suggests, any question regarding shutoff valves requires far more specifics, likely unsuited to public forums.

munny Your accuracy is as good as the installation details and the liquid data, and of course a calibrated transmitter

In the infantry training handbooks circa WWII and the 1950's, water purification in emergencies, away from all resources, suggested collecting the water, and letting it stand for a 4 hours in the sun, to let the solids settle out and the bacteria to digest all available content, then decant...

munny, Just test it yourself, and report back, we'd all be interested in what you find

What level of accurracy do you seek?

what distance are you dealing with.

With a bit of guess work regarding pipe size etc. The measurment error is small, the time constant listed is the exponential time constant with a settling time for 2% error being 4X the time constant. Most heat exchangers are characterized by heavy turbulence to improve heat transfer. With...

or you can run your own: thermowellsoftware com

If you have flow and nominal fluid data, I'll run a measurment error calc for the well mixed flow condition to indicate what you're dealing with.

Yashaar, You measurements suggest that you do not have uniform temperature profiles near the HEX with hot and cold regions, the sensor located a few meters away, provides a more representative measurement due to turbulent mixing. You may actually have a problem with the flow/heat distribution...

You'll need far more detail to get a response other than start with the vendor documents and contact the supplier.

where you have long "dead times" and a single sensor, proportional only is the easiest to work with and doesn't over drive the system.

That looks like the kind of damage you'd expect in a plant that has been in service a few decades. Just replace it and make sure, that the tubing layout is designed for maintenance to take things apart without damaging them. Take alook at...