25LB R449A (R-449A) Refrigerant Gas | 10 Cylinders

Ten cylinders is a float, not a buy for a single job. 250 lb sits behind a cluster of stores or a distribution centre and absorbs a bad month. Each 25 lb cylinder is a manual lift; the consignment as a whole is not, so think about handling and where it will live. Many local codes limit how much compressed gas may sit in a single area, and a bulk holding wants ventilation, restraint and distance from exits.

Most of what this blend charges was built for R-404A or R-507: supermarket low- and medium-temperature racks, display cases, walk-ins, reach-ins, cold stores, ice machines. Capacity and pressures sit close to R-404A, which is the point of the blend — in many retrofits the compressor, pressure controls and POE oil can stay, though that is a per-system call. As high-GWP stock gets harder to source under the HFC phase-down, retrofitting the rack you have is often the practical route.

Charge liquid, every time — from the liquid port, metered into the low side, or weighed into the high side with the system off. Vapour-charging a zeotropic blend fractionates it, and what runs afterwards is no longer R-449A. Glide is real: work superheat and subcooling off dew and bubble points rather than a single saturation figure, and expect to retune the valve. Read the data plate and service history before topping up. Venting is prohibited in most jurisdictions — recover into dedicated cylinders, unmixed.