After Cooler Manufacturers in India
United Heat Exchangers designs and manufactures high-performance after coolers for compressors and industrial process systems. Air-cooled and water-cooled variants available, built to ASME standards and ISO 9001 quality assurance.
High-Efficiency After Coolers for Compressors & Industry
An after cooler is a heat exchanger used to cool compressed air or gas immediately after it exits a compressor stage. Cooling the discharge stream reduces moisture content, prevents downstream equipment damage, and improves the efficiency of pneumatic systems. United Heat Exchangers manufactures after coolers in both air-cooled and water-cooled configurations to suit a wide range of industrial applications and site conditions.
The air side of an after cooler is generally considered clean service, though customers may specify an airside-fouling factor where airborne contaminants are present. The fouling factor represents a resistance to heat transfer and is added to the resistances arising from heat transfer coefficients on both sides. For process-side streams, a fouling factor is almost always included in the thermal design calculation to ensure long-term performance is maintained.
Design Flexibility & Size Range
United Heat Exchangers offers after coolers in a wide range of sizes to suit everything from small reciprocating compressors to large industrial centrifugal units. There is no upper limit on the total installed size of a cooling system — however, individual bay widths are constrained by transport requirements. Most manufacturers, including United Heat Exchangers, limit the width of a single bay to approximately 16 ft. (approximately 4.9 m), which conveniently coincides with the maximum practical width for belt-drive systems up to 50 HP. For larger duties, multiple bays are combined in a single structure.
All after coolers are custom-engineered to the customer's process data, including inlet gas temperature and pressure, required outlet temperature, flow rate, gas composition, and available cooling medium. Our in-house thermal design team uses proven calculation methods to size each unit accurately.
Key Features & Benefits
- Significantly reduces moisture content in compressed air, protecting downstream instrumentation and tools
- Lowers outlet gas temperature for safer, more efficient pneumatic and process operations
- Air-cooled design requires no cooling water — ideal for remote or water-scarce sites
- Water-cooled design achieves lower approach temperatures where cooling water is available
- Custom fouling factor provisions for airborne and process-side contaminants
- Modular multi-bay construction for high-capacity installations with no transport width restrictions
- Manufactured and tested under ISO 9001:2015 certified quality management system
- ASME coded construction available for pressurised service requirements
Technical Specifications
| Parameter | Details |
|---|---|
| Cooling Type | Air-cooled (forced / induced draft) or water-cooled (shell & tube) |
| Duty Range | Small reciprocating compressors to large centrifugal units |
| Bay Width Limit | Up to 16 ft. (≈ 4.9 m) per bay; multi-bay for larger duties |
| Drive System | Belt drive (up to 50 HP per bay) or direct drive |
| Tube Materials | CS, SS 304 / 316, Admiralty Brass, Copper, Duplex, as required |
| Fin Types | Embedded, L-footed, Extruded, Grooved (aluminium or SS) |
| Design Standards | ASME / HEI / TEMA as applicable |
| Operating Pressure | Up to high-pressure compressed gas service (per design) |
| Quality Certification | ISO 9001:2015; ASME Code stamp available |
After Cooler Gallery
Types of After Coolers We Manufacture
United Heat Exchangers offers after coolers in several design configurations to match your compressor type, site conditions and process requirements.
Air-Cooled After Cooler
Forced or induced draft fan systems cool compressed gas using ambient air. No cooling water required — ideal for remote sites, offshore platforms, and locations where water conservation is a priority. Aluminium finned tube bundles maximise heat transfer in a compact footprint.
Water-Cooled After Cooler
Shell and tube or double pipe construction using cooling water as the cold medium. Achieves lower compressed air outlet temperatures than air-cooled designs when cooling water is available. Suitable for high-pressure applications and tight temperature approach requirements.
Finned Tube After Cooler
Extended surface finned tube bundles provide maximum air-side heat transfer area in a compact, lightweight structure. Available in aluminium, stainless steel, or carbon steel fins depending on the corrosive nature of the ambient environment and required service life.
Applications of After Coolers
Our after coolers are used across a wide range of industries wherever compressed air or process gas needs to be cooled efficiently after compression.
Air Compressor Systems
Reciprocating, screw and centrifugal compressors require after coolers to reduce discharge temperature and moisture before air enters distribution networks.
Power Plants
Gas turbine inlet air cooling and instrument air systems in power generation facilities rely on after coolers for reliable, moisture-free compressed air supply.
Petrochemicals & Refineries
Process gas cooling at the outlet of multi-stage compressors in refinery and petrochemical plants, ensuring downstream process conditions are met safely.
Cement & Mining
Heavy-duty after coolers for pneumatic conveying, dust collection and instrument air systems in cement plants, quarries and mineral processing facilities.
Pharmaceuticals & Food
Oil-free, clean compressed air at controlled temperatures is essential in pharmaceutical manufacturing and food & beverage processing environments.
General Manufacturing
Factory compressed air systems, paint shops, automated assembly lines, and pneumatic tooling all benefit from effective after cooling to extend equipment life.
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