Hydraulic Die Forming Discussion Group

Re^2: why is glycerin removed from the gauges?

Lee Marshall
lmarshal@bonnydoonengineering.com

To add to Phil's reply:
These are industrial gauges that are typically inserted into high pressure lines that could see a lot of intense and rapid pressure fluctuations. To prevent damage to the internals, or the needle falling off, the manufacturer adds glycerin as a "shock absorber". For their needs, it is perfect. For our needs, it slows down the reaction time (particularly with the electric pump, because it delays the pressure reading.

Lee

On Thu Sep 4 '08, Phil Poirier wrote
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>The gauges are emptied of their glycerin so the gauge can respond to your input pressure in real time, if we leave the glycerin in the gauge the time delay is a few seconds (too much delay for our requirements). Instant feedback is required for silhouette dies and forming with urethanes.
>Phil

>On Thu Sep 4 '08, woody wrote
>-----------------------------
>>why are the gauges on the presses deviod of the glycerin?

Fri Sep 5 '08

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