Freon™ HP81 (R-402B) — Wholesale HCFC Refrigerant

HCFC refrigerant blend for R-502 retrofit in low temperature refrigeration systems.

Freon™ HP81 (R‑402B) – HCFC Retrofit Refrigerant for Low-Temp Systems

Category: Hydrochlorofluorocarbon (HCFC) — specifically an HCFC blend designed as a drop-in replacement for R‑502 in low-temperature refrigeration equipment.

🌱 Classification & Regulatory Compliance

Refrigerant Class: HCFC blend (R‑22/R‑125/R‑290)

Frosty Freeze A/C Products Company

ASHRAE Safety: A1 — non-flammable, non-toxic

Honeywell Advanced Materials

Environmental Properties:

Ozone Depletion Potential ≈ 0.03

Global Warming Potential ≈ 2,261 (AR4)

U.S. Status: Production discontinued; available via reclamation only since Dec 31, 2019

⚙️ Technical Highlights

Property Specification

Blend Composition ~60% R‑22, 38% R‑125, 2% R‑290 by weight

Boiling Point (1 atm) –52.6 °F (–47.0 °C)

Honeywell Advanced Materials

Critical Temperature ~181 °F (~82 °C)

Honeywell Advanced Materials

Critical Pressure ~655 psia (~45 bar)

Honeywell Advanced Materials

Saturated Liquid Density ~70.4 lb/ft³ (86 °F)

Honeywell Advanced Materials

Temperature Glide Low — behaves nearly azeotropic

Honeywell Advanced Materials

🌟 Core Benefits

Direct Drop-In Replacement for R‑502

Shares nearly identical refrigeration characteristics—only slightly warmer discharge temperatures (5.5 to 11 °C / 10 to 20 °F)—makes it ideal for vending machines, ice cream machines, coolers, and other self-contained systems

Oil Compatibility Without Conversion Needed

Works with mineral oil out of the box; switching to alkylbenzene oil can reduce refrigerant charge by 10–25%

Non-Flammable & Safe Handling

ASHRAE A1 rating—no special flammability precautions required during installation and servicing

Proven Field Performance

Trusted in low-temp commercial settings for decades; still available via reclamation, ensuring continuity for service providers

🛠️ Recommended Applications

Ideal for:

Standalone low-temp equipment—vending, ice machines, and soft-serve units

Withdrawn or dated R‑502 systems requiring ongoing maintenance

Situations where system redesign or new refrigerant adoption is impractical

📦 Availability & Handling

Commonly supplied in 13–28 oz disposable cans with CGA600 top-mount valve for technician convenience

Also available in 13 lb cylinders for larger systems Meier Supply

Closed-loop reclamation is required where production is restricted; handle under EPA Section 608 certification

✅ Why Choose HP81?

Seamless R‑502 replacement—no system overhaul needed

Zero flammability risk, safe, reliable operation

Oil flexibility—no conversion required in most cases

Retrofit-ready solution—ideal for equipment with extended service life

Regulatory compliance—available through reclamation post-2019

📞 Next Steps

✅ Download SDS & Technical Bulletin for full safety and installation reference

✅ Order Now — available through AlperRefrigas for certified HVAC professionals

Upgrade low-temp refrigeration systems with a trusted HCFC alternative. Contact AlperRefrigas to secure your supply of Freon™ HP81 (R‑402B) today!