Call: 704-545-3922
Call: 704-545-3922
EVAPORATOR COILS (dx)
INTRODUCTION
Evaporator Coils (DX) are made for heat absorption and generally function at a lower pressure. These coils are generally used for spot cooling or as part of an air handling system.
PRESSURE/TEMPERATURE DESIGN
Sunco Evaporator Coils made with 3/8" tubing are rated for up to 400 PSIG and 300°F. While coils made from 1/2" or 5/8" tubing are rated for 250 PSIG and 300°F. All evaporator coils are factory tested at 600 PSIG.
TYPICAL CONSTRUCTIONS
Most Sunco Chilled Water Coils are designed with either 1/2” or 3/8” O.D. tubes. However, there are certain applications where it is desirable to use 5/8” tube coils. Perhaps the most critical factor in designing a refrigerant Evaporator Coil is the need to keep the velocity of the refrigerant flow up high enough that the oil that is present remains entrained within the refrigerant. This is one of the primary reasons that so many DX Coil are manufactured with 3/8” tubes. The smaller tube diameter facilitates the mixing of the oil within the refrigerant. However, on coils with longer tube lengths, the smaller diameter can lead to excessive refrigerant pressure drops, so larger tubes may be used in those cases.
Tubes: Most commonly used material is copper and we offer a variety of tube wall thickness options to handle different applications.
Fins: Aluminum is the most commonly used material for the fins since aluminum offers good heat transfer characteristics and lower costs.
Casings: Typically galvanized steel, with stainless options available upon request.
Connections: Typically either copper, brass, or steel.