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Chiller & Evaporator Coils

Packless chiller and evaporator coils are available in seven standard sizes ranging from 1 to 5 tons in capacity. The coil utilizes a coaxial "tube-in-tube" design providing efficient heat transfer and minimizing fouling as a chiller or refrigerant evaporator.

Packless chiller coils are C-UL-US listed for refrigerant side working pressures of 650 psig and water side working pressures of 400 psig.

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Available Models

Model ▲ Capacity ━ Length ━ Width ━ Height ━
CHAX-3100-H 1 tons 9 58 in 6 12 in 6 12 in
CHAX-3150-H 1.5 tons 13 1116 in 10 916 in 5 78 in
CHAX-3200-H 2 tons 14 78 in 11 916 in 7 14 in
CHAX-3250-H 2.5 tons 14 78 in 11 916 in 8 58 in
CHAX-3300-H 3 tons 18 34 in 15 716 in 8 38 in
CHAX-3400-H 4 tons 22 716 in 18 58 in 10 1116 in
CHAX-3500-J 5 tons 22 78 in 21 in 7 516 in

More Details

Coil Cut Away
The coaxial "tube-in-tube" design of Packless coils.

Packless chiller coils utilize a coaxial "tube-in-tube" design. Water flows through the inner tube while refrigerant flows in the annulus between the inner and outer tubes.

The key to the high performance of Packless coils lies in the convoluted multi-lead inner tube manufactured in a patented process. The resulting convoluted tube has increased heat transfer surface area per unit length and permits full flow of both water and refrigerant around its entire periphery for improved performance.

Turbulence imparted by the convolutions to both the water and refrigerant flows further enhances the thermal performance, while inhibiting the accumulation of deposits on the surfaces. The net result is an effective, compact heat exchanger with superior anti-fouling characteristics.

Optimum heat transfer with Packless chiller coils is achieved with a counterflow arrangement of water and refrigerant.

For non-standard applications, Packless can manufacture chiller coils with different capacities, mounting brackets, and fittings. Tell us what you need and our engineers will assist in making it happen.