[Kamal]

Originally Posted by Vikrant Singh

Hi Kamal,

Whats your feedback on MO49 Plus since your system was charged? Will call u if you could leave a number. Thanks.

Vikrant,my experience of replacing R12 with Duponts' MO 49 Plus has been excellent.
As I mentioned in an earliest post, this drop in replacement refrigerant is perceptibly better than R12, the refrigerant that it replaced.
I got the A/C servicing,gas charging etc done beginning of May this year & the A/c has been performing beautifully.
I have no hesitation in recommending both MO49Plus as a replacement refrigerant for R12 & Aman of Okhla,New Delhi as a car A/c technician.My ph no is 011 42143992.

[sgiitk]

Just make sure duPont MO49 is not essentially butane-propane. At one time it was used in the US for refrigerators and the like. However, since it is inflammable it is NOT recommended for automobiles. So the gas should not be inflammable.

[Kamal]

Originally Posted by sgiitk

Just make sure duPont MO49 is not essentially butane-propane. At one time it was used in the US for refrigerators and the like. However, since it is inflammable it is NOT recommended for automobiles. So the gas should not be inflammable.

A very valid concern,sgiitk,thanks for bringing it up.
However, the follg excerpt from Duponts technical bulletin on MO49Plus deals with its automotive application concerns-
"SAFETY
Ischeon MO49Plus™ has ASH RAE safety classification of A1 and is non-flammable as formulated and under
leakage scenarios as specified in ASH RAE standard 34-2007. See the Safety of DuPont Refrigerants (AS-1) bulletin
and the MSDS for details".
Sounds quite reassuring, does it not?
I had provided a link to Duponts bulletin in my post dtd 13/05/11;here is the link again-
http://www2.dupont.com/Refrigerants/.../isceon49.html
This bulletin has some further links near the bottom of the page which go into more technical details about this refrigerant's performance;you, being an engineer would be able to follow them much better than I.
But, to me the bottomline is that MO49Plus is just fine & safe as a replacement refirigerant for R 12.
Regards.

[Vikrant Singh]

Was a pleasure talking to you Kamal & thx for your feedback, v helpful.
I have a new compressor/ condenser/ evaporator/ expansion valve/ accumulator/ oil/ flushing solvent and some cans of MO49Plus to get on with a new a/c setup & get that cold air blowing again. :-)
Cheers.

[Kamal]

One Year Update.
As posted by me earlier, I had got my 1997 Esteem's AC serviced & filled with the refrigerant Dupont MO 49 Plus in the beginning of May last year from Aman in Okhla N.Delh.
Exactly a year later, the AC is working absolutely fine, which is tribute to Aman's workmanship & the effectiveness of this drop -in replacement gas for R12.
I make sure to thoroughly wash the AC condenser & the radiator every week,tho; Delhi is such a dusty city, esp in summer.

[S_U_N]

Great inputs, Kamal.

I am trying to find out where I can get this gas in Mumbai/ Pune region. Searching on the internet so far has not given me any significant leads.
My Zen is now without gas and since I don't intend to keep the car for long, this drop-in replacement is the best option for me.

[sgiitk]

@S_U_N; In Delhi it will be Daryaganj. I am sure there is some refrigeration market in Pune. They should be able to supply or guide you. duPont products must have multiple distributors.

[manolin]

as the threadstarter, thought I would update this. I managed to fill R12 at some local ac mechanics. And then a friend who bought my car has also managed to source R12 every year to keep topping it off. So don't panic, the stuff is still available.

[Kamal]

Originally Posted by manolin

as the threadstarter, thought I would update this. I managed to fill R12 at some local ac mechanics. And then a friend who bought my car has also managed to source R12 every year to keep topping it off. So don't panic, the stuff is still available.

I do hope it really is R12.
When I was looking for it in April 2011, I visited/rang up virtually every AC workshop in south/central Delhi with no luck.
Everyone, including a friend, who is a MASS owner, said that R12 had stopped being manufactured since a couple of years & all existing stocks had finished.
I was cautioned that some unscrupulous AC mechanics might try to pass off 134A as R12, so I trust you've got it from a reliable source.
TWO YEAR UPDATE.
AC working fine, great cooling, no top up required, only periodic washing of the condenser & radiator.

[manolin]

Originally Posted by Kamal

I do hope it really is R12.
When I was looking for it in April 2011, I visited/rang up virtually every AC workshop in south/central Delhi with no luck.
Everyone, including a friend, who is a MASS owner, said that R12 had stopped being manufactured since a couple of years & all existing stocks had finished.
I was cautioned that some unscrupulous AC mechanics might try to pass off 134A as R12, so I trust you've got it from a reliable source.
TWO YEAR UPDATE.
AC working fine, great cooling, no top up required, only periodic washing of the condenser & radiator.

Nope. It was R12. Have seen the cylinder markings. Probably still available for industrial use.

Btwn this was in Bombay, not Delhi.

[sgiitk]

There is some (decreasing quantity) of reclaimed R12 going round. The quality (purity) is suspect. Better bite the bullet and switch to the duPont stuff. R12 manufacture stopped in 2003.

[Kamal]

Mods: In this month alone, I have received 8 to 9 phone calls re availability of Duponts MO49 Plus, the drop-in replacement for the banned R12.
Aman, the car AC workshop owner in Okhla, South Delhi has shipped this refrigerant to 2 car owners in Mumbai, apart from filling it for local owners.
Each time, I have to go thru a round of explanations about this substitute gas.
I think it would be helpful to people looking for R12/ replacement if the thread title is modified to read "DuPonts MO 49Plus,the replacement for R12".
Aman told me this morning that he has ordered a container load of this refrigerant gas so availability with him is assured,

[Kamal]

For the benefit of members who are in need of Duponts'MO49 Plus,( the 'drop in' replacement refrigerant for the long phased out R 12 ), the cans are available at Tayal Refrigeration( Dupont Distributors ), Daryaganj, New Delhi - 011 23280478, 9716650368; however, Tayal will not be able to supply the nozzle pipe to connect the cans to the AC Assy inlet valve, only the refrigerant.
I'm also posting all the mob nos of Aman Sahil, owner- Aman's EMX Workshop, Okhla Industrial Estate Phase 3,South Delhi: 9891574136,9312804492 & 9210408092.
Aman does excellent AC work & always has adequate stocks of MO49 Plus; he also ships the refrigerant cans to customers outside Delhi, if they so require.
Regards,
Kamal ( 011 42143992 )

[Thumper1604]

Pardon me if my question is stupid but I would like to know is this DuPont MO49 Plus gas common for all passenger cars?

[ghpk]

Originally Posted by Thumper1604

Pardon me if my question is stupid but I would like to know is this DuPont MO49 Plus gas common for all passenger cars?

Nope.
As per Mr.Kamal post
""DuPonts MO 49Plus,the replacement for R12""

For newer cars the refrigerant (A.C. Gas) have different specs and varies with the size of compressor and manufacturers.