Coil-type boilers are compact, rapid-startup units with minimal water content, making them popular in food processing, hospitals, and facilities with intermittent steam demand. Their helical coil design means the coil itself is the primary wear component, subject to scaling, corrosion, and thermal fatigue over time.
AQ Process Systems sources and exports replacement coils, burner components, feedwater pump internals, and control system parts for all major coil-type boiler manufacturers. We also stock consumables like feedwater treatment chemicals, gaskets, and sensor elements for routine maintenance.
Given the compact nature of coil-type boilers, many spares are manufacturer-specific. We work with your boiler make and model number to source the exact replacement parts required.
| Component | Specification | Description |
|---|---|---|
| Coils & Core | ||
| Helical Coils / Tube Assemblies | SA 178, SA 214 | Helical wound | OEM-specific geometry | Complete replacement coils, the core heat transfer element. Wound to OEM specifications per model. |
| Combustion Chambers | Stainless steel or refractory-lined | OEM-specific | Inner combustion chamber liners and outer shell components, model-specific dimensions. |
| Coil Seals & O-rings | High-temperature silicone or Viton | Seals between coil sections and header connections, high-temperature rated for steam service. |
| Burner & Ignition | ||
| Burner Assemblies | Gas, oil, or LPG | Compact pre-mix type | Complete burner replacement units, pre-mix gas burners or pressure-atomising oil burners. |
| Electrodes & Ignition Parts | Ceramic-insulated | 6-10kV | Spark ignition electrodes, flame rods, ignition cables, and high-voltage transformers. |
| Gas Valve Trains | Double block & bleed | EN 676 compliant | Solenoid valves, pressure regulators, and gas valve train assemblies for burner fuel supply. |
| Feedwater & Pumps | ||
| Feedwater Pumps | Multi-stage centrifugal | Model-specific | Replacement feed pumps, impellers, wear rings, mechanical seals, matched to boiler model. |
| Water Level Probes | Conductivity probes | 1-3 point level | Electronic water level sensing probes for automatic feed control and low-water protection. |
| Check Valves & Fittings | SS or bronze | Small-bore | Feedwater check valves, drain valves, and small-bore fittings specific to coil-type boiler piping. |
| Controls & Safety | ||
| Control Boards / PCBs | OEM-specific | PLC or relay logic | Main control boards, display panels, and interface modules, matched to boiler make and model. |
| Pressure Switches & Transmitters | 0-25 bar | Adjustable setpoint | Steam pressure limit switches, operating pressure controls, and 4-20mA pressure transmitters. |
| Safety Valves | ASME or CE certified | Compact body | Compact safety relief valves rated for the boiler's design pressure, certified and set-pressure tested. |
| Temperature Sensors | RTD or thermocouple | Thermowell-mounted | Stack temperature, steam temperature, and feedwater temperature sensors. |
Parts are matched to OEM material specifications and dimensional tolerances. Please provide the equipment manufacturer, model number, and serial number (if available) for precise part identification. Mill Test Certificates (MTC) supplied with all tube materials per EN 10204 3.1.
The most common replacement parts for coil-type boilers are the helical coil assembly (scaling and corrosion), feedwater pump internals (high cycling wear), ignition electrodes and flame rods (consumables), water level probes (fouling), gaskets and seals, and safety valves (periodic recertification).
Yes. We supply OEM-compatible replacement coils and components for Miura, Clayton, Fulton, Certuss, and other coil-type boiler manufacturers. Parts are matched to the specific boiler model number for correct fit.
Coil lifespan varies significantly based on feedwater quality, operating hours, and cycling frequency. With proper water treatment, coils typically last 8-15 years. Poor water quality or excessive cycling can reduce this to 3-5 years. Regular descaling and water treatment are the best ways to extend coil life.
Yes. We source OEM and OEM-compatible control boards, PCBs, display panels, and sensor modules for Miura, Clayton, Fulton, and other makes. Please provide the boiler model and serial number for exact part identification.
Coil-type boilers are particularly sensitive to feedwater quality due to their once-through design and compact coil geometry. Feedwater should be softened (0 ppm hardness) and ideally include oxygen scavenger treatment. TDS, pH, and conductivity should be monitored continuously. We can supply feedwater treatment chemicals and monitoring instruments.
Share your equipment make, model, and part numbers, we respond within 24 hours.