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Tool Talk Discussion Forum

pressure gauge differences

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Matt S

10-13-2003 19:35:02




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Are all pressure gauges basically the same or do they need to be made for a specific purpose? The reason I ask this is that I need to check the pressure my PS pump is putting out on my ford 641. I have a milk crate full of old soda regulators for CO2 with gauges on them, some of which go up to 3000 psi. could I use one of these gauges to check the pressure on the PS pump? I just hate to spend money if something I already have will do the job

I looked in the grainger catalog at gauges and most of the ones they have are listed for water / air / oil, so it seems as if a gauge is a gauge.

any insight would be helpful.

Thanks, Matt S NY

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MarkB

10-16-2003 03:33:37




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 Re: pressure gauge differences in reply to Matt S, 10-13-2003 19:35:02  
It's worth mentioning that you should never use a gauge that's come in contact with oil on high-pressure oxygen. It will explode. Every so often you hear of someone who takes the O2 gauge off of their torch set to check hydraulic pressure.



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wdTom

10-15-2003 17:20:03




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 Re: pressure gauge differences in reply to Matt S, 10-13-2003 19:35:02  
Have to agree with what Joe told you. There is of course a quality difference, depending on how much you pay. A gauge will take a lot of use and abuse if it is a good one. For example at work we have a machine with a hydraulic system in it that actuates a cylinder 16 to 18 times a minute and there is a gauge on the work side of the piston. It should have a valve on the gauge so it can be shut off and not have to jump from 0 to 1500 PSI that many times a minute 5 days a week two shifts. But it doesn't and it has been working for 8 years. It is liquid filled.

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Joe Evans

10-13-2003 19:56:30




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 Re: pressure gauge differences in reply to Matt S, 10-13-2003 19:35:02  
Yes, a gauge is a guage; PSI is PSI regardless of the fluid. Have the proper range gauge for the pressures you think you will encounter. Don't want to put 0~60 PSI range gauge on a hydraulic system that my indeed see 3000 PSI.

Now... there are gauges for specific long term applications. SS stem and bourdon tubes (the thingy inside that distends and makes the needle move) for corrosive fluids; glycerin filled gauges for dampening needle movement when the fluid is pulsating, and gauges that are isolated from yucky stuff like hot asphalt by means of a diaphragm seal plus all kinds of face diameters, ranges, and case materials.

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matt S

10-13-2003 20:02:37




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 Re: Re: pressure gauge differences in reply to Joe Evans, 10-13-2003 19:56:30  
Thanks thats what I thought. The PS Pump should only be putting out like 900 psi max so the 3000 psi gauge should do the trick.



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