Cleanroom Equipment Spare Parts

Cooling Coil

A framed copper-tube and aluminum-fin chilled-water coil for replacing a matched sensible and latent cooling section in cleanroom air-handling equipment.

Copper Tube Circuit
Aluminum Plate Fins
Serviceable Water Header
Matched AHU Replacement

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Product Introduction

The cooling coil is a finned-tube heat exchanger installed in an AHU airstream to cool and, when surface temperature is below the air dew point, dehumidify supply air. Seamless copper tubes are mechanically expanded into closely spaced aluminum plate fins so the tube wall and fin collars maintain direct thermal contact. A rigid galvanized-steel casing supports the coil at the air-handler opening, while the side header distributes chilled water among the circuits. Replacement selection must reproduce the required face size, row depth, circuiting, connection arrangement and airside performance of the installed coil.

Key Features

Mechanically expanded copper tubes maintain close contact with the aluminum fin collars across the heat-transfer surface.

A galvanized flanged casing supports the fin pack and provides defined attachment points within the AHU coil section.

The vertical header groups supply, return, vent and drain interfaces on one accessible service side.

Multiple tube rows and circuit arrangements can be selected to balance cooling duty, water pressure drop and air resistance.

Customer Product Concerns

A replacement cooling coil must fit the existing AHU and reproduce its hydraulic and airside behavior without creating condensate carryover or excessive pressure loss.

A coil with the wrong face size or flange arrangement cannot seal into the existing AHU opening.Finned dimensions, casing envelope, flange orientation and mounting-hole locations are matched to the removed coil and equipment opening.

Different circuiting or connection sizes can produce poor water distribution and an unsuitable pressure drop.Tube rows, circuits, header layout and threaded connection sizes are selected together for the intended chilled-water flow.

Excessive fin density increases air resistance and can trap dirt in a hygiene-sensitive air handler.Fin spacing is chosen to balance heat-transfer area, cleanability and the available fan pressure for the actual application.

Condensate can bypass the drain pan or be carried downstream when coil velocity and installation geometry are mismatched.Coil depth, face velocity, casing drainage provisions and the adjoining drain-pan arrangement are coordinated for controlled moisture removal.

Typical Applications

Cleanroom make-up air unitsRecirculating air-handling unitsHumidity-control AHU sectionsReplacement chilled-water coil banks

Technical Parameters

Typical material construction and dimensional ranges for framed AHU chilled-water replacement cooling coils are listed below.

Core Material	Seamless copper tubes mechanically expanded into corrugated aluminum plate fins
Panel Thickness	80-450 mm nominal coil depth, depending on tube rows and casing
Effective Width	300-2400 mm nominal finned face width
Maximum Length	Up to 3000 mm overall casing length for common sectional AHU replacements
Steel Facing Thickness	1.2-2.0 mm galvanized-steel casing and end plates
Core Density	Approximately 2700 kg/m³ for the aluminum fin material
Thermal Conductivity	Approximately 200-235 W/(m·K) for aluminum heat-transfer fins
Surface Finish	Natural galvanized-silver casing and aluminum fins with copper header and brass threaded connections
Joint Type	Mechanically expanded tube-to-fin bond with brazed copper circuits and male threaded header connections
Customization	Available based on the intended application and operating environment.

Available Options

Custom face size and row depthSame-end or opposite-end connectionsGalvanized or stainless-steel casingAlternative fin spacing and protective coating

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