Certified Pre-heating Systems for Purge System Air Supply in Low Temperature Environments
Features
Heats incoming air from -47°C
Air flow capacity up to 9,000 Nl/min
Two heater capacities - 2.1kW or 6.4kW
Local and remote low temperature alarms
Stainless steel enclosure construction
Expo’s low temperature motor purge and pressurization systems require compressed air supply at a temperature above -40oC. In cases where the air supply is at a lower temperature, Expo offer in-line heaters to pre-heat the purge air.
The pre-heaters are self-contained systems designed to elevate and maintain the temperature of high flows of purge system air within a specified temperature range. Air is passed through a coil of tubing, heated using self-limiting trace heating cable. This ensures that over-heating is not possible.
Switching of power to the air heater is thermostatically controlled. A second thermostat gives an alarm signal when the output air temperature drops below a pre-determined value. There is a local alarm indicator as well as volt-free contacts for remote alarm connection.
| Air Inlet | Instrument quality air, 4-7 barg |
| System variants | 2.1 kW - Flows up to 4,000 Nl/min (For use with size 3 motor systems) 6.4 kW - Flows up to 9,000 Nl/min (For use with size 5 motor systems) |
| Temperature range | Purge air temperature -47℃ Ambient temperature range -50℃ to +50℃ |
| Power supply | 210V to 250V AC single phase supply |
| Signal outputs | Low air temperature alarm |
| Certifications | ATEX Zone 1 |
