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Dear All
Any specification or standard for the d/p xtmrs directly connected to measured medium via impulse tubing without isolation vlv.
Regards,
Moh'd
http://cr4.globalspec.com/thread/84001/manifold
Read the instructions. If you don't understand them, ask the supplier for help.
All else failing, hire an instrumentation tech.
It depends on the fluid and its pressure, and whether the process can be conveniently interrupted to change a bad instrument.
In our plant we do install instrument without isolation vlv due to process requirement.
Regards