BR-20A Recirculating Chiller — 30L Medium-Capacity with 2500W Cooling for 10L and 20L Rotary Evaporator Applications

The BR-20A's 30L stainless steel bath and 2500W cooling capacity at 10°C represent a substantial performance step above the compact BR Series models — providing the thermal mass (30L vs 5–8L) and cooling power (2500W vs 530–600W) required for large rotary evaporator condenser cooling and sustained industrial process cooling. The 30L thermal mass absorbs the high transient heat loads of 20L rotary evaporator operation — including flask changes, solvent transitions, and startup loads — without the temperature spikes that would occur in small-bath chillers under equivalent thermal demands.

The BR-20A's pump delivers 17 L/min at up to 15 m maximum head through Φ12 mm interface connections — providing the higher flow rate and pressure head required to effectively circulate coolant through the larger condenser coils of 10L and 20L rotary evaporators and through longer tubing runs in multi-instrument cooling supply configurations. The Φ12 mm interface diameter reduces pressure drop at high flow rates compared to the Φ10 mm connections of the compact BR models — maintaining effective flow delivery through the larger condenser circuits of medium-scale rotary evaporation systems.

The BR-20A uses R410A refrigerant — selected for its superior thermodynamic efficiency and higher volumetric cooling capacity compared to R404A at the medium-scale power ratings required for 2500W cooling performance. R410A provides the refrigerant circuit characteristics needed for reliable 2500W cooling at 10°C and 1600W at 0°C in the BR-20A's medium-capacity compressor configuration, while maintaining ODP = 0 (zero ozone depletion potential).

The BR-20A's PID temperature controller with programmable multi-step function provides the same advanced control capability as the compact BR models — at the medium-capacity scale. In 20L rotary evaporation applications where the condenser temperature may need to be adjusted as solvent composition changes during multi-fraction separation or mixed-solvent evaporation, the multi-step programming automates these temperature transitions — maintaining optimal condensation efficiency throughout complex large-scale evaporation protocols without manual intervention.

The BR-20A's 350 × 350 × 250 mm liquid tank opening provides a substantially larger immersion area than the compact BR models — enabling direct immersion cooling of large reaction vessels, pilot-scale process containers, and large sample assemblies alongside the external circulation function. This larger tank opening makes the BR-20A suitable for both direct immersion large-scale cooling applications and external circulation to connected large rotary evaporators and process equipment.