Nitrogen rig question

[erj-145mech]

If a regulator regulates to 200 psi, then it is 200psi. it doesn't matter if its a high or a low pressure regulator.
It only matters if the knucklehead cannot read a pressure gauge, and I have run into a few of those.

 

[avbug]

Ah, now we shift the focus to debating my facts.

What on earth are you talking about?

If you have a pride issue invested in your "facts," good for you. Whatever.

The point was made at the outset that one needs to be careful when applying pressure to a strut...but that's really beside the point when the poster is talking about a little brass fitting, and asking where to get one.

The topic was never regulators.

Seeing as you're upset about debating your "facts," and seeing as I didn't address any of your "facts," let's do so, then.

Nitrogen rigs can be either high pressure, for using on 121 type struts, or low pressure, such as for GA struts (amoung other things).

Fact: there is no such thing as a 121 type strut.

Fact: there is no such thing as a GA strut.

Fact: as ERJ-Mech stated...200 psi dialed into a regulator is 200 PSI.

Fact: various regulators are available in varying capacities, but a properly calibrated regulator will put out the same pressure that's demanded of it it, period.

I know of more than one mechanic that died because he hooked up a high pressure rig to a low pressure strut.

Stupidity hurts. But perhaps you know of more than one mechanic who merely put too much pressure to a strut...period. Rather than using a "high pressure regulator" on a low pressure strut.

Presumably you're attempting to describe two stage regulators which will include two pressure gauges; one will show the input pressure from the nitrogen source (bottle or rig), with the other showing the output pressure as set by the user. Both high pressure and low pressure output regulators will have the same input...both will show bottle pressure. However, a typical lower pressure regulator will be able to output 0-300 PSI, where whereas other regulators capable of delivering higher pressures will generally show 300-3,500 PSI in the output range.

Further, many units utilize manifolds with multiple attach points for doing more than one strut at the same time, to the same identical pressure, with a common pressure gauge. These are often aircraft specific, and are not uncommonly fabricated in the field.

The use of a "high pressure" regulator does not mean one is going to blow up a component. I've used "high pressure" regulators for years for struts and tires. How it is used makes the difference in the end result...but the thread here isn't about teaching someone to service a strut. It's about a poster who ran over the brass fitting and wanted to replace the fitting. Read the thread before responding, next time, and try not to get too excited. You might just blow a gasket.

 

[IFollowRoads]

It only matters if the knucklehead cannot read a pressure gauge, and I have run into a few of those.

Truth.