D.X. Cooling Coils are suitable for all Direct Expansion Refrigerants
that are non-corrosive to copper.
Cooling Coils are generally manufactured for horizontal airflow. If the
coil is to be mounted in a vertical duct, or the airflow is other than
horizontal, this must be specified when ordering.All Cooling Coils must be installed with the primary tubes horizontal.The connections on D.X Coils are usually on the same side but if
opposite side connections are required, this must be specified in your
enquiry.Cooling Coils are available in depths from one to sixteen rows with
alternate rows equally staggered, to obtain maximum heat transfer.Heat Transfer Surface
The primary tubes are manufactured from solid drawn seamless copper
Fins are of the smooth plate type produced from aluminium, vinyl coated
aluminium or copper and are punched with self spacing collars.
The primary tubes are mechanically expanded into the pre-formed collars
thus assuring a good metallic bond between the fins and tubes. This
results in uniform heat transfer with guaranteed performance throughout
the life of the coil. The tubes are brazed or silver soldered into
copper return bends, terminating in liquid distributors and suction
headers, each provided with plain copper connection.
The cooling surface is
housed in a casing manufactured from galvanised sheet steel. Where the
primary tubes pass through the casing, smooth belled holes are provided
to permit freedom of movement for expansion and contraction. The casing
is produced in channel and tray formation suitably stiffened to prevent
distortion. The flanges formed by the casing sections can be drilled for
attachment to adjacent components on request. The bottom panel of the
casing is formed into a drip tray with a B.S.P. socket drain connection.

All DX Cooling Coils are subject to an air under water test of 2000 kPa.
Where higher working pressures are involved coils can be tested up to
3500 kPa or twice their working pressure.

Coils with a galvanised steel casing are generally supplied unpainted
but special finishes are available on request.