What a 20kW Hire Chiller is used for
A 20kW hire chiller is a compact industrial cooling unit supplied for temporary use when a plant needs cold water without buying a permanent machine. It is commonly used during planned maintenance, emergency breakdowns, production peak periods and trials on new equipment. In practice, it keeps water temperatures steady so lasers, moulds and process lines can continue working without heat-related faults or poor product finish.
For sites in Alberton, Germiston, Boksburg and the wider Ekurhuleni area, hire cooling is often the quickest way to keep output moving during repairs or upgrades. It also helps when a chiller is being serviced and you cannot afford downtime. For coastal sites, the benefit is the same, but the unit and pipework must be protected against corrosion and moisture. That planning is worth it.
Because 20kW sits in the middle range for temporary cooling, it suits smaller production lines and single machines better than whole-factory cooling. It is a practical choice when you need enough capacity for a defined load, not an oversized unit that wastes power and water.
Typical sizes, limits and cooling options
Although this page covers a 20kW hire chiller, the actual hire setup can be adjusted to suit the application. Some jobs need a water only arrangement, while others need a glycol mix for lower leaving temperatures or better freeze protection. Hose lengths, flow rates and tank sizes can also be matched to the site layout.
- Nominal cooling duty: 20kW at standard operating conditions
- Use with closed loop water systems or water glycol mixes
- Suitable for temporary duty on machines with moderate heat load
- Can be supplied with flexible connections for quick tie-in
- Optional buffer tank on applications with short cycling or unstable load
On busy lines, a stable flow rate is just as important as the cooling duty. A chiller can only do its job if the pumps, strainers and pipework are sized properly. If the system has long pipe runs or narrow hoses, the delivered cooling can drop. That is why we look at the full circuit, not only the machine rating.
Where this hire chiller suits best
This unit is well suited to laser cooling, small to mid-size mould cooling and process water duties where temperature control must stay within a narrow band. It is also useful for temporary line extensions, product trials and backup support during municipal water interruptions or load-shedding related plant changes. When a production line cannot stop, hire cooling gives the team breathing room.
Common applications include injection moulding, extrusion support, laser cutting systems, heat exchanger support and general process water cooling. For food, plastics, packaging and light engineering sites, the main advantage is simple: you can keep the line running while repairs are planned properly. In some cases the temporary chiller is kept in place for several weeks, especially when a refrigeration part is on order or a shutdown has been delayed.
- Plastics mould cooling and temperature holding
- Laser machines needing stable chilled water
- Process lines that cannot stop for repairs
- Temporary cover during plant shutdowns
- Backup cooling while a permanent unit is serviced
Installation, power supply and site readiness
Hire installation starts with a site check so we can confirm the water connections, floor space, ventilation and electrical supply. Most 20kW units need a suitable three phase power point and a clean installation area with enough airflow around the condenser. The chiller must sit level, with access for service and safe hose routing. If the site has tight plant rooms or outdoor exposure, we plan the position before delivery.
The unit is normally connected into an existing closed loop or temporary hose run. Where required, we can add filtration, pump checks and pipework retrofits so the chiller does not work against blocked strainers or undersized lines. For coastal industrial areas, corrosion protection and regular rinse down should be part of the plan. Indoor units need good ventilation, otherwise the room can heat up quickly and affect performance.
We also confirm whether the machine needs process water only or a water glycol mix. If the system has sensitive controls, we check setpoints and alarm handling before handover so the operator is not left guessing when a fault appears.
Care, servicing and what happens during the hire
Even on a short hire, the chiller still needs basic care. Strainers must stay clean, water quality must be checked and leaks should be dealt with early. If the system is running in a dusty workshop or near chemical vapours, the condenser can foul faster than expected. That is why temporary cooling is not a fit-and-forget arrangement.
Our team can support the hire with preventative maintenance, breakdown repairs, refrigeration repairs and water treatment checks where needed. If the load changes during production, the setpoint and flow may need adjusting. A unit that is right on day one can be under pressure a week later if the line output increases. Keep an eye on the alarms, pump noise and return water temperature.
- Check filters and strainers daily on dirty sites
- Confirm water level and top-up requirements
- Watch for hose wear, kinks or loose clamps
- Review setpoint changes if production changes
- Report alarms early instead of running through them
What to check before ordering a 20kW hire chiller
Before you place an order, have the machine details ready. We need the required cooling load, the target water temperature, the flow rate, the inlet and outlet connection sizes and whether the system uses water or glycol. If you are unsure, a cooling audit helps us work it out from the actual plant conditions rather than guesses.
It also helps to know how long the hire is likely to run, where the unit will stand and whether the site has a reliable power supply. For shutdowns, tell us the start date and whether the site will be operating while the unit is connected. If there are municipal restrictions, access limits or security controls, mention those early. A delayed delivery on the day of a shutdown can cost more than the chiller itself.
At Raynen, we support hire cooling from Alrode, Alberton to sites in Johannesburg, Pretoria, Durban, Cape Town and Rustenburg. Clients contact us through the enquiry form on our contact page, and we use the details to match the temporary unit to the job. The aim is simple: get the right cooling in place with no wasted time, and keep the line moving.
Key facts
| Cooling duty | 20kW nominal |
|---|---|
| Application | Temporary cooling for lasers, moulds and process lines |
| Power supply | Three phase supply required, site dependent |
| Temperature range | Set to suit process needs and glycol use |
| Connection type | Flexible hose tie-in or existing pipework interface |
| Hire use | Shutdown cover, breakdown backup and short-term production support |
