A/C O-ring query

**phezthie** · February 18th, 2011 08:46 PM

greetings to all....

i just want to know your opinion as to what kind/type/brand of o-ring is best suited for aircon with 134 refrigerant... Likewise, any insight as to where it can be bought will be highly appreciated.. TIA

**jick.cejoco** · February 18th, 2011 09:03 PM

Originally Posted by phezthie

greetings to all....

i just want to know your opinion as to what kind/type/brand of o-ring is best suited for aircon with 134 refrigerant... Likewise, any insight as to where it can be bought will be highly appreciated.. TIA

for R134a refrigerant, the o-rings to use is HBNR. back in the days when we used R12, we used buna o-rings and seals or nitrile o-rings, the buna or nitrile o-rings do not seal against leak of R134a better than HBNR. the o-rings should be soaked or prelubricated with PAG oil prior to installation

**phezthie** · February 18th, 2011 09:27 PM

many thanks for that quick reply sir jick...

unfortunately, you just confirmed that my NBR-70 o-ring service kit has no use at all....

i have been trying to look for HNBR here (your out of the country right now I presume) but to no avail. most a/c suppliers simply say that nbr will do and that Hnbr is quite costly for a yearly a/c maintenance.

From your end, may i know if their representation is correct or acceptable, that is to use nbr instead of hnbr taking into consideration your earlier post? again,many thanks... regards

**jick.cejoco** · February 19th, 2011 03:01 PM

Originally Posted by phezthie

many thanks for that quick reply sir jick...

unfortunately, you just confirmed that my NBR-70 o-ring service kit has no use at all....

i have been trying to look for HNBR here (your out of the country right now I presume) but to no avail. most a/c suppliers simply say that nbr will do and that Hnbr is quite costly for a yearly a/c maintenance.

From your end, may i know if their representation is correct or acceptable, that is to use nbr instead of hnbr taking into consideration your earlier post? again,many thanks... regards

your nbr o-rings will do with a little bit more of leaks and leak testing. however, if you really want peace of mind, order the HNBR o-ring kit