Need to pressure test? (hb)

heatboy

This project sits out in the middle of the woods and with all of the rain, dragging a compressor or generator through all of the mud is certainly no fun. What to do? Use your nitrogen bottle! Retrofit a refrigeration schrader valve (Johnstone, United, etc) to your air test kit and go! Use your gauge set to slow the nitrogen going in. Much faster than a compressor also. Anyone ever try it?

hb

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Mike Kraft

years ago.............

us plumbers called em air tanks:)BTW Rems makes a slick looking compact hand pump air machine.

cheese

Jeff Lawrence_18

All the time

I just call it fix a flat.

Or fill the gas line for pressure test.

Or blow out the condensate lines.

Or clean condensers on bottom coil refrigerators(It beats a leaf blower!)

Oh! I do use the nitrogen when I'm doing my A/C work for purging the lines and pressure testing them.

J.

tim smith1

nitro pressure test

all the time, no thermal expansion, inert you know. I have always liked nitrogen as a choice.

hot_rod

A portable air tank

and an small 12 volt compressor works for me. I fill the tank(s) at my shop, then use a small inexpensive 12 compressor to refill them at the truck, on the job, if needed.

Mine is an old speedaire, Grainger has they as well as automotive supply places. Probably the box stores and K Mart type stores also.

I've done a few with a hand pump also, a long process!

hot rod

Dale

One thought

We use them for all sorts of tests. I like to tee in a pressure relief on the outlet to make sure the test pressure isn't exceeded in a major way, little reliefs that you can set are available from welding supply dealers, the 150# ones are good for AC work as this is all an evap on r22 should get. The tire inlet fitting option is a VERY good idea, N2 is what the airlines and stock car set uses.

Unknown

Pressure testing

with dry nitrogen serves two basic functions. You can check for leaks and repair same.

You can remove some moisture from the system and use a wet bulb thermometer to check if moisture is still in the system before you charge the compressor and piping.

Looks like a plan to me.

jake