Pressure Gauge of General Instruments Consortium Installation Procedure

Bourdon tube gauges that have been overpressured stretch the bourdon tube so that the pointer does not return to zero at zero pressure.

But your gauge does not indicate a pressure when pressure is applied.

Either the pressure is not being applied to the gauge or the mechanics of indicating the pressure are broken inside the gauge.

Is this a mechanical bourdon tube pressure gauge? (what is a general instrument make?)

Is there a shut-off valve between the line and the port where the gauge is installed?
Is that valve open?

Is the pointer still fastened to the pinion shaft?

Is there mechanical damage to internal linkage or gearing components?

1. Yes this is a mechanical bourdon tube pressure gauge.

make: General Instruments Consortium (GIC)

2. There is only a syphone in between the process line and gauge.(actually it is used in boiler drum)

3. Yes the pointer still fastened to the pinion shaft.

4. No, there is no mechanical damage to internal linkage or gearing components.

please suggest.

Is your problem with Pressure Gauge solved?

I once had a bourdon tube gauge that indicated no pressure. It had a small, stamped piece shaped like a dome bottomed cup inserted into the pressure bore in the process connection.

It was designed to be there. But this piece did not have the tiny hole drilled in the center of the dome like it should have had. Its design purpose was to dampen or limit or snub pressure spikes by limiting flow through the tiny orifice hole. Because there was no hole, there was no fluid getting into the bourdon tube and no pressure was being applied to the gauge.

I manged to to snag the stamped cup with a thread tap and remove it, and used the gauge without the snubber cup.

Maybe the line pressure isn't getting to the bourdon tube.

The siphon is clogged with scale.

Has it been reassembled with the pointer the wrong side of the 0 stop?

The quarter turn isolation valve's handle was assembled 90° off, so the valve appears to be open but is actually in the closed position.