All r134a low pressure (suction) connections are the same size. All high pressure connections are the same size. The low and high connections do not interchange.
No, R134b and R134a are not the same refrigerant, and R134b is not a direct drop-in replacement for R134a. While both are similar in terms of their chemical structure, they have different properties and performance characteristics. Using R134b in a system designed for R134a may lead to inefficiencies or damage. Always consult the manufacturer's specifications before making any refrigerant substitutions.
3.4 pounds of r134a for a day cab r12 is different
Ozone friendly refrigerant HFC134a.....
If you are talking about a gas blowback m4, then yes. Green Gas, Top Gas, and propane are all pretty much the same thing and will give you about the same fps. HFC134a (or you can use duster gas) is a much weaker gas, which might not even work in your gun because it might not have enough power to cycle the bolt. If it does work, HFC134a will give much lower fps.
Same thing
The "a" in R134a is an indicator. There are two gases that are similar R134 and R134a. They both have the same chemical make up which is 2 hydrogen, 2 carbon and 4 fluorine. However in R134 all of the elements stay separated in a gaseous state. In R134a the elements combine together in different ways. Two hydrogens can be bonded with 4 fluorines or 2 carbons with 4 fluorines, etc. Lower case letters are the "organization" of the molecules and upper case letters are the different blends of the refridgerant.
According to my repair manual the refrigerant is HFC134a.
Same thing
No r404a is not compatible with r409a, r134a and 404a use the same lubricates and are compatible but r409a use a different lub making them incompatible
No
Same thing, R stands for Refrigerant.