899 Powers Ferry Rd SE, Marietta, GA 30067, USA
About Us
With an outstanding sales and support staff

Velang LLC is a leading supplier of refrigerants to the refrigeration and air conditioning market for more than 40 years. We operate refrigerant packaging facilities accross the continent with substantial bulk storage, bulk breaking and blending capabilities. This, in combination with our established network of high quality raw material manufacturers, allows us to supply you with the refrigerants you need, when you need them.

…Most up-to-date technology in the refrigeration industry

As you probably know, matter can exist in three states—solid, liquid, and gas. We’re most familiar with water, which we see as ice when it’s cold, liquid when it’s at room temperature, and steam when we boil it. But in order for refrigeration to work, you need something that has a low boiling point, something that exists as a gas at room temperature and can be easily pressurized into a liquid so that, when it is allowed to expand, it immediately boils at room temperature and cools.

We offer a wide range of refrigerant products, including HFCs, HFOs and natural refrigerants, a full range of package sizes including cylinders, drums, and bulk deliveries, as well as refrigerant recovery.

We’ve been talking about air conditioning for a couple of weeks now, so if you’re still feeling the heat then it’s time to wrap up the series so you can get out to your garage and put what you’ve learned to good use.

First things first. We learned the theory behind refrigeration and air conditioning, which centers on this wonderfully useful bit of physics: When liquid boils and evaporates into a gas, it expands and cools. This week, we discuss the thing that’s actually boiling and cooling—the refrigerant itself.

In addition to the low boiling point, there are two other de facto requirements for refrigerant: It shouldn’t be poisonous, and it shouldn’t be flammable. The problem is that some inexpensive available refrigerants—ammonia and propane, for example—are poisonous and/or flammable. Because of this, in the early 1930s, a new refrigerant based on a chlorofluorocarbon (CFC), specifically dichlorodifluoromethane, was developed. It became known as R12 or Freon. When used in refrigerator and A/C systems, R12 cooled incredibly well. And it was safe—neither poisonous to breathe, nor flammable. In fact, R12 was used for many years as a propellant in a variety of aerosol products and sprayed directly into the air, and it is closely related to the halon used in fire extinguishers.


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