High-pressure misting systems for flash-evaporating mist.
At around 70 bar a misting nozzle produces droplets of roughly 10 microns – small enough to flash-evaporate before they land. That is why high-pressure systems are the standard for commercial cooling, dust and odour control.
- Working pressure
- Above 35 bar, typically ~70
- Pump range
- 7–300 bar
- Lines
- HP nylon / SS
- Nozzles
- Anti-drip, 0.1–0.6 mm
Smaller droplets, more cooling, less wetting
Low-pressure systems run on mains or booster pressure and produce 50–80 micron droplets that often fall before they evaporate. A high-pressure system uses a positive-displacement plunger pump to raise water above 35 bar – typically about 70 bar (1000 psi) – and push it through precision orifices.
The result is a far finer mist that evaporates in a fraction of a second, delivering more cooling per litre of water and staying dry underfoot. High pressure also gives the mist enough energy to capture dust and carry odour neutralisers.
- Continuous-duty plunger pumps with unloader and pressure relief
- High-pressure nylon or stainless steel lines with compression or push-fit fittings
- Anti-drip nozzles that stop dripping when the pump stops
- Timers, humidistats and remote control
Where high pressure sits
| System class | Working pressure | Typical droplet | Wetting risk | Typical uses |
|---|---|---|---|---|
| Low pressure | Up to about 10 bar | 50–80 microns | Higher – surfaces can get damp | Plant watering, nurseries, budget patio kits |
| Mid pressure | About 20–35 bar | Finer than low pressure | Moderate – cycle timers help | Homes, small patios, cafes in dry weather |
| High pressure | Above 35 bar, typically ~70 bar | Around 10 microns or finer | Low when correctly designed | Industry, restaurants, sheds, dust and odour control |
| Fogging | 70–140 bar | Ultra-fine fog | Low; needs treated water | Humidification, greenhouses, textile, special effects |
What makes up a high-pressure misting system
Pump station
Direct-drive or belt-driven plunger pump with motor, gauge, unloader and relief.
Filtration
5 micron sediment filter plus calcium inhibitor or softener for hard water.
Mist lines
High-pressure nylon or SS tube sized for flow and pressure drop.
Nozzles
Brass or stainless with SS or ceramic orifice and anti-drip check.
Controls
On/off, cycle timer, temperature and humidity controllers.
Installation
Clamps, fittings, drain valves and commissioning.
High-pressure misting is used for
Mist cooling systems
Flash-evaporating mist for open areas, sheds, patios and work zones.
Industrial mist cooling
Heat relief for shop floors, furnaces, warehouses and loading bays.
Indoor & outdoor cooling
Mist lines and fans for restaurants, terraces, venues and platforms.
Dust suppression
Fog and mist at transfer points, crushers, hoppers and stockyards.
Odour control
Atomised neutralisers for STPs, landfills, waste and processing sites.
Adiabatic pre-cooling
Pre-cool intake air on chillers, condensers and VRF outdoor units.
Sizing a high-pressure system
- Number of nozzles and orifice size → total flow
- Line length and layout → pressure drop
- Duty hours → pump and motor class
- Water quality → filtration and softening
Good to know
- Pump choice follows flow, not just pressure
- All fittings and tubes must be rated for the working pressure
- Long lines may need larger tube or zoning
How a TrueMist project runs
A structured conversation before any equipment is proposed.
- 01
Describe the problem
Tell us what is happening, where and when.
- 02
Assess the conditions
Area, airflow, humidity, water and power on site.
- 03
Define the system
Pump, nozzles, lines, filtration and controls sized to the duty.
- 04
Install & validate
Commissioning checks against the agreed objective.
The components behind every system
Every TrueMist system is built from the same tested families of parts.
Misting pumps
Low, mid and high-pressure pumps from 7 to 300 bar.
Misting nozzles
Brass and stainless nozzles, 0.1–0.6 mm orifices, anti-drip.
Mist tubing
High-pressure nylon and stainless steel mist lines.
Filters & water prep
Sediment, calcium-inhibitor and high-pressure filters.
Fittings & controls
Nozzle unions, fittings, timers and controllers.
Related solutions and guides
Questions we are often asked
What pressure is a high-pressure misting system?
Anything above about 35 bar is considered high pressure; most systems run around 70 bar (1000 psi). Fogging systems go higher, to 140 bar.
Is a high-pressure misting system better than low pressure?
For cooling people and dust control, yes – finer droplets evaporate faster and wet less. Low pressure is cheaper and suits watering plants or small home kits.
What pump does a high-pressure system use?
A positive-displacement plunger pump – direct-drive or belt-driven – sized to the total nozzle flow. See misting pumps.
How long do high-pressure pumps last?
With clean water, correct oil changes (around every 500 running hours) and seal service, plunger pumps run for many seasons.
Can I upgrade my low-pressure system to high pressure?
Usually the nozzles, tubing and fittings must be replaced with high-pressure rated parts. We can reuse the layout where practical.
Your application deserves the right system.
Share your operating conditions. Start with a conversation, not a pre-selected package.