DIRECT EXPANSION COILS
DIRECT EXPANSION COILS
Designed to deliver maximum heat transfer efficiency, Direct Expansion Coils are also known as “Evaporator” coils. They can be used both as an evaporator (cooling coil) and condenser (heating coil). Compared to a chilled water system, in a direct expansion coil system, a treated airstream passes through the outside of the evaporator coil, allowing it to be directly cooled by the expansion of refrigerant passing through the tubes of the coil, without using water.
DIRECT EXPANSION COIL SPECIFICATIONS
Primary Surface
Round seamless copper tubes are mechanically expanded into the fin collars of the secondary surface. The mechanical expansion provides a permanent metal-to-metal bond for efficient heat transfer. Tubes are staggered in the direction of airflow and only return bends are used – NO reduced tube wall in the bend radius by using hairpin bends.
TUBE SIZE OPTIONS
5/8″ O.D. x .020″ wall thickness standard with optional wall thickness of (.025) (.035) and (.049). Centerlines are 1.5″ in the tube face and 1.299″ between rows.
1/2″ O.D. x .017″ wall thickness standard with optional wall thickness of (.025). Centerlines are 1.25″ in the tube face and 1.083″ between rows.
3/8″ O.D. x .016″ wall thickness standard with optional wall thickness up to (.035). Centerlines are 1″ in the tube face and .866″ between rows.
Rows available are 2, 3, 4, 5, 6, 8, 10 and 12.
