Saw a tech using these..

[jnsrose]

I have a couple like that mounted on thumbscrew type core depressors.
http://www.cdvalve.com/product-categ.../cd2070/10-169

I mostly use them for getting oil pressure readings on simi-hermetic compressors.
The depressor lets me open the valve after connecting the gauge, and close it before removing it, so there is almost no mess made.

I did not know these thumb screw depressors existed. I think I may have to get a few. Any common suppliers carrying them or are they only online?

[itsiceman]

On the thumb screw ones release the pressure on your hose connection otherwise your oring blows out

[PMARS2345]

I did not know these thumb screw depressors existed. I think I may have to get a few. Any common suppliers carrying them or are they only online?

C & D makes them.

[76olds]

I did not know these thumb screw depressors existed. I think I may have to get a few. Any common suppliers carrying them or are they only online?

I get them at Johnstone supply.

Part #H24-849.


And watch when you remove them, as already mentioned, the little o-ring can blow out real easy (they include spares).

[fliks]

I had one many years ago but was not too impressed, constantly adj. I think I got mine at Johnstones Supply.

[mark beiser]

On the thumb screw ones release the pressure on your hose connection otherwise your oring blows out

C & D makes them.

I get them at Johnstone supply.

Part #H24-849.


And watch when you remove them, as already mentioned, the little o-ring can blow out real easy (they include spares).

The ones I linked in my previous post don't have the o-ring blowout issue, because the valve can be back seated.
After disconnecting, you can crack the valve open slightly to slowly release the pressure held in the tube/hose.
They are not the same ones 76olds gave a Johnstone part number for.

http://www.hvacr-tools.com/product/c...or-back-seated

[uniservice]

Used em for years on critically charged cascade systems (blood and tissue freezers) & ice machines. They're in my Veto.