Most reliable Schrader valve cores for r410a high side...

[DoctorBuzz]

Different colors, different brands.... Yet many people complain that they experience leaks after installing aftermarket valve cores on 410a systems, particularly the high side.

Is there a brand or specific model number that would limit call backs?

[BALloyd]

Valve cores are not the seal. The caps are the seal. Get better brass caps and make sure they are put back on every time.

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[coolerik]

^this


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[Answer-Man]

Valve cores have differrent pressure ratings, It's not a one size fits all applications. It's been my experience the color of the seal notes the pressure range you just need to look it up. The valve core I stock are light blue is OK for up to 1000 psi. If it's the first time I've looked a unit and I need to remove the charge I replace the valve core .Again just my opinion the cap is not the seal, but whenever I come across a machine with plastic caps I install a brass cap, oh sorry I mean I install a tamper-resistan cap which all that I have seen are metal with a seal. Since I have started doing this I had had no call backs due to leaking valve cores and/or caps. I do believe in the belt and suspenders thinking in many things

[gustavhorna]

I need to purchase some cores, the options are:

1. cheap ones from a all in one repair kit from Amazon, these have transparent seal
2. high pressure cores with blue teflon seal
3. High Pressure/High Heat - Blue Viton
4. High Pressure/High Heat - Brown Viton
5. High Pressure/High Heat - Green Buna
6. High Pressure/High Heat - White Nitrile

which one for R410A ?

[gustavhorna]

here some reference table:

http://www.allchemi.com/eng/refreger...atibility.html

so these teflon seal schraders are likely to fail on R410A despite being advertised for R410A...