The pressure tap tube for the plug valve in coaxial catalytic units often breaks
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Why do the pressure tap pipes for the plug valves in coaxial catalytic units keep breaking? They break shortly after the unit starts operating – what’s the reason? Has this kind of problem occurred with you as well?
It shouldn’t be like that; is the vibration too strong?
Is yours of the coaxial type? Ours enters from the top of the catalyst holder
By examining the broken pressure lead wires inside the two devices, it can be seen that this is mainly caused by catalyst wear. What’s worse is the gauge for internal pressure drop.
It is mainly caused by the excessively high and fluctuating linear speed inside the sleeve
Not enough attention has been paid; it’s likely due to an unreasonable design, stress, wear, or vibration. It can be adjusted according to the specific circumstances; once the problem is identified clearly, it should be possible to find an appropriate solution.
Is it caused by the expansion and contraction of the startup riser? If it’s due to the differential pressure from a plug valve, then the positive end of the pressure lead should lead from the end of the startup riser to the outside, while the negative end should lead from outside the sleeve. It’s probably a design issue; we haven’t used plug valves with pressure drop before