Kelvins specializes in refrigerant filling and sales, covering mainstream fluids such as R22, R32, R134a, R404A, R407C, R410A, R507 and R290, purity ≥99.9%, nationwide delivery.
Our refrigerants are grouped by chemical family. Below is an overview of each series — properties, typical applications and substitution trends.
Chlorinated HCFCs, once widely used in A/C and refrigeration. Phased out under the Montreal Protocol for ozone depletion; new projects adopt greener alternatives.
Non-chlorinated HFCs — today’s mainstream refrigerants for A/C, cold-chain and commercial cooling. R32 and R134a combine efficiency with proven application.
Zeotropic/azeotropic HFC blends (e.g. R404A, R410A) tuned to specific duties, replacing chlorinated refrigerants.
Natural hydrocarbons (propane R290, isobutane R600a) — very low GWP and efficient, common in fridges, freezers and light commercial cooling.
4th-gen hydrofluoroolefins (R1234yf, R1234ze) — ultra-low GWP, the long-term green successor to HFCs for automotive and commercial use.
Perfluorocarbons (e.g. R14) — extremely low boiling point and chemically stable, for ultra-low-temperature and special industrial cooling.
A decade of industry expertise, trusted by over 2,000 customers for stable quality, ample stock and professional technical service.
Every batch is tested by gas chromatography; moisture, acidity and evaporation residue all exceed GB/T 7373 requirements.
Quality management system and business licenses, hazardous-chemical business license, inspected cylinders, full traceability.
Own warehouse with mainstream models in stock, shipment within 24h, support for bulk long-term supply.
Senior engineers provide selection advice, alternatives and charging guidance; after-sales response within 2 hours.
Kelvins specializes in R&D, filling and sales of refrigerants (freon). Its products cover mainstream fluids such as R22, R32, R134a, R404A, R407C, R410A, R507 and R290, widely used in residential A/C, commercial central A/C, automotive A/C, cold-chain logistics and industrial refrigeration. The company strictly follows national standards; every batch is tested by gas chromatography with purity stably above 99.9%, providing high-quality refrigerants and full technical support.
Our products serve every link of the refrigeration and A/C industry chain.
Split, inverter and cabinet A/C charging and after-sales service.
VRF, air-cooled modules and chiller charging and maintenance.
Cold stores, reefer trucks and supermarket display cases for low-temp systems.
Passenger, bus and construction machinery A/C refrigerant replacement.
Chemical, pharmaceutical and food processing process cooling and low-temp environments.
Air-source heat pump water heaters and heating units with eco-friendly refrigerants.
Industry policy analysis, refrigeration know-how and company updates.
As the Kigali Amendment to the Montreal Protocol is implemented domestically, HFCs production quotas are further tightened. Prices of high-GWP fluids such as R134a, R404A and R410A trend upward, while low-GWP alternatives accelerate their substitution.
Read More →As the controlled HCFC R22 is phased out, in-service systems face retrofit decisions. This article systematically compares R407C, R410A and R32 across thermodynamic performance, retrofit cost and system adaptability.
Read More →Blends such as R404A, R407C and R410A differ fundamentally from single-component refrigerants in charging method. Wrong vapor charging causes composition segregation, capacity loss and even compressor damage.
Read More →After submitting your request, our technical consultant will contact you within 2 hours with model recommendations and the latest prices.