A chiller that is too small cannot hold temperature, and one that is far too large wastes energy and can cycle badly. Sizing starts with what you need to cool.
1. Cooling load
Find the heat the instrument rejects, usually in watts or kW in its manual. Add a margin for the pump heat and pipework, and compare with the chiller’s cooling capacity at your working temperature, not only at its headline rating.
2. Temperature and stability
Check the setpoint you need and the stability the instrument allows. Many analytical instruments tolerate only small drifts.
3. Flow and pressure
Match the pump flow and pressure to the instrument’s requirements. Too little flow causes hot spots; too much pressure can stress fittings.
4. Fluid and materials
Use the coolant the instrument manufacturer specifies, and check that the chiller’s wetted materials are compatible.
Used chillers
Ask whether the unit has been run and checked, and what refrigerant it uses.
Browse our laboratory chillers.
Need a part? Email info@plcnorth.com or message us on WhatsApp with the full part number, quantity and preferred condition, and we will send a quote.