CUSTOM PRESSURE-BEARING AIR HEATER
Electric Compressed Air Heater
Custom pressure-bearing electric heating equipment for compressed-air pipelines, drying, purge and industrial process systems.
The Electric Compressed Air Heater is an industrial inline electric heating unit designed to raise the temperature of compressed air flowing through a closed pipeline. It is selected according to actual or standard airflow, operating pressure, inlet temperature, required outlet temperature and allowable pressure drop.
Heating power, pressure-bearing shell, element material, connection standard, control method and safety interlocks can be engineered according to the process. The heater can be supplied as a standalone unit or with a control cabinet, sensors, valves, instruments and system piping.
Product Overview
The Electric Compressed Air Heater is used where compressed air must be heated before entering a dryer, pneumatic process, regeneration system, test device or production line. Unlike a low-pressure duct heater, the heater body and connections are designed around the pipeline pressure and the required pressure drop.
A typical unit includes a pressure-bearing heater shell, inlet and outlet nozzles, removable electric heating element bundle, terminal box, temperature sensors, insulation and mounting supports. Optional scope can include pressure instruments, flow switch, control cabinet, valves and connecting pipework.
The design should consider moisture, oil carryover, particles and the compressed-air dew point. These conditions influence element surface loading, material choice, drainage arrangement and maintenance access.
Xiangyuan Machinery can supply the heater only, a heater with independent control cabinet, or a packaged compressed-air heating unit prepared for connection to the customer’s compressor, receiver, dryer or process equipment.
Key Features
Pressure-Bearing Construction
Shell thickness, nozzles and flanges are engineered according to operating pressure and design conditions.
Compressed-Air Duty Calculation
Heating power is selected from airflow, inlet temperature, target outlet temperature and pressure condition.
Controlled Pressure Drop
Internal flow passages and element arrangement are designed around the allowable line pressure loss.
Removable Element Bundle
Flanged element assemblies can be supplied for inspection and maintenance access.
Moisture and Oil Consideration
Air quality, dew point and oil carryover are evaluated when selecting watt density and materials.
Stable Outlet Temperature
PID, SCR or staged power control can regulate the compressed-air outlet temperature.
Flow and Pressure Interlocks
Flow, pressure and temperature signals can be integrated into heater permissive and trip logic.
Flexible Pipeline Connections
Flange standard, nozzle direction and horizontal or vertical arrangement can be customized.
Standalone or Packaged Supply
The heater can be supplied alone or with controls, instruments, valves and piping.
Typical Technical Parameters
The following parameters are for reference only. Final design is confirmed according to the operating medium, temperature, dimensions and project requirements.
| Parameter | Customizable Range or Options |
|---|---|
| Product Name | Electric Compressed Air Heater |
| Heating Medium | Compressed air; air quality and oil/moisture content to be confirmed |
| Heating Power | Typically 2 kW to 2000 kW, or engineered according to heating duty |
| Airflow | Specified in Nm³/h or m³/h, or as a mass flow rate, together with the corresponding pressure and temperature conditions |
| Inlet / Outlet Temperature | Customized according to process requirement |
| Working Pressure | Pressure-bearing design according to operating and design pressure |
| Allowable Pressure Drop | Calculated according to pipeline and compressor-system limits |
| Installation | Horizontal, vertical or skid-integrated inline installation |
| Connection | Flanged or custom pipeline connection |
| Shell Material | Carbon steel, SS304, SS316L or selected material |
| Heating Element Material | SS304, SS310S, Incoloy 800, Incoloy 840 or selected alloy |
| Control Method | PID, SCR power regulation, staged control or PLC |
| Power Supply | 380-415 V, three-phase, 50/60 Hz, or project-specific |
| Protection Options | Over-temperature protection, flow interlock, pressure monitoring, phase-loss and phase-sequence protection, earth-leakage protection, grounding and emergency stop |
| Optional Supply | Control cabinet, instruments, valves, piping, insulation and hazardous-area configurations where applicable |
Structure, Materials, Control and Safety
Structure of the Heater
The heater normally consists of a cylindrical pressure-bearing shell with inlet and outlet nozzles, a flanged electric heating element bundle and an external terminal box. The element arrangement is selected to provide heat-transfer area while keeping velocity and pressure drop within the compressed-air system limits.
Temperature sensors can be installed at the outlet and, where required, on the element sheath or inside the heater body. Drain or low-point arrangements can be considered when condensate may be present. Lifting lugs, supports and removable-bundle clearance are confirmed from the site layout.
For packaged supply, the assembly can include isolation valves, pressure gauges or transmitters, flow instruments, control cabinet, piping and a skid frame.
Materials and Customization
Material selection depends on pressure, outlet temperature, humidity, oil carryover, particles and any corrosive components in the compressed air. Carbon steel may be used for the shell under suitable conditions, while SS304 or SS316L can be selected for cleaner or more corrosive service.
Heating-element sheath materials can include SS304, SS310S, Incoloy 800, Incoloy 840 or another selected alloy according to surface temperature and air composition. The design does not assume that one material is suitable for every compressed-air system.
Shell diameter, flange standard, element arrangement, watt density, insulation, nozzle direction and terminal-box orientation can be customized from the confirmed operating data.
Control System
Outlet-air temperature is normally the primary control variable. PID control with SCR power regulation can provide modulating output, while staged contactor control may be used where step control is acceptable.
The control cabinet can receive compressor or upstream-equipment status, flow permissive and pressure signals. Local/remote operation, HMI, alarm output and PLC or DCS communication can be included according to the project.
Control logic can prevent energization without confirmed flow, reduce power when flow falls and initiate a trip if outlet or element temperature exceeds the configured limit.
Safety Protection
Typical protection includes an independent over-temperature cutout, flow interlock, pressure monitoring, phase-loss and phase-sequence protection, earth-leakage protection, grounding and emergency stop. The final protection scheme should be coordinated with the compressor and pipeline system.
The heater should not operate against a closed or blocked line. Upstream and downstream valve status, pressure limits and relief arrangements should be coordinated with the overall system design.
For hazardous-area projects, explosion-proof terminal-box and heater configurations can be evaluated according to the confirmed site classification. Certification requirements for the destination market should be confirmed before quotation and final design.
Typical Applications
Pneumatic Conveying
Heating compressed air used for material conveying and process conditioning.
Air-Dryer Regeneration
Supplying heated compressed air for compatible regeneration or drying cycles.
Instrument Air Preheating
Raising instrument-air temperature for low-temperature or process requirements.
Purge and Cleaning Air
Heating purge air used in industrial equipment and pipelines.
Packaging Equipment
Providing controlled hot compressed air for production and packaging processes.
Test Benches
Heating compressed air for valves, components and pressure-system testing.
Pilot and Process Systems
Using heated compressed air as the working gas in compatible pilot, testing or production systems.
Low-Temperature Startup
Preheating compressed air and equipment during cold-site startup.
Surface Drying
Delivering heated compressed air for component or surface drying.
Chemical Processing
Heating compatible compressed air before reactors, dryers or treatment equipment.
Automation Equipment
Integrating heated compressed air into customized machinery.
Skid Packages
Installing the heater with valves, instruments and controls on a modular skid.
How to Select the Right Electric Compressed Air Heater
1. Airflow
Provide the airflow in Nm³/h or m³/h, or the mass flow rate, together with the corresponding pressure and temperature conditions.
2. Inlet Temperature
State minimum, normal and maximum inlet temperature.
3. Required Outlet Temperature
Provide target temperature and allowable control tolerance.
4. Operating and Design Pressure
Provide normal, maximum and design pressure.
5. Allowable Pressure Drop
State the maximum line pressure loss.
6. Air Quality
Describe moisture, dew point, oil carryover and particles.
7. Operating Mode
Confirm continuous, intermittent or variable-flow operation.
8. Power Supply
Provide voltage, phase, frequency and available capacity.
9. Connection Standard
Provide flange standard, size and rating.
10. Installation Direction
Confirm horizontal, vertical or skid-mounted arrangement.
11. Material Requirement
State corrosion, cleanliness or high-temperature requirements.
12. Control Method
Confirm PID, SCR, staged control, PLC or DCS interface.
13. Instruments
List required temperature, flow and pressure instruments.
14. Safety Interlocks
Confirm compressor, flow, pressure and emergency-stop signals.
15. Site Classification
Provide indoor/outdoor, ambient, IP and hazardous-area information.
Frequently Asked Questions
Common questions about Electric Compressed Air Heater selection, customization and industrial use.
What is an Electric Compressed Air Heater?
How is it different from an Electric Air Heater?
What information is required for selection?
Can it be supplied with valves and instruments?
Can an explosion-proof design be provided?
Why Choose Xiangyuan Machinery
Xiangyuan Machinery designs pressure-bearing industrial electric heaters and control systems around the actual compressed-air duty, rather than selecting only by nominal power.
Thermal & Material Engineering
Thermal design based on airflow, pressure and required temperature rise. Pressure-bearing shell, nozzle and flange arrangements for pipeline installation.
Flexible Mechanical Arrangement
Material options selected from air quality and operating temperature.
Control & Safety Integration
PID, SCR, staged control, PLC and remote interfaces available. Flow, pressure and temperature interlocks can be integrated.
Complete Project Supply
Standalone heater or packaged skid supply. Manufacturing inspection, electrical testing and project documentation according to scope.
Send Us Your Compressed-Air Conditions
Provide airflow, inlet and outlet temperatures, operating pressure, pressure-drop limit, air quality, voltage and installation requirements. Xiangyuan Machinery will prepare a technical proposal and quotation.