L/LL/KL Footed Fin Tubes–Spiral Wound Finned Tubes

L/LL/KL Footed fin tubes

Winding process: Spiral wrap the fin strip onto the base tube by mechanical force, and fix it by spot welding or crimping without overall hightemperature treatment to avoid the deterioration of the material properties of the base tube.

Model selection guide:

Ltype: Prioritize cost and versatility.

LL type: suitable for efficient heat exchange with compact space.

KL type: for scenarios with high dust content and high heat transfer requirements.

Features  

Type L: Costeffective with moderate fin height for general heat exchange.  

Type LL: Highdensity fins for spaceconstrained, highefficiency applications.  

Type KL: Serrated fin edges disrupt fluid flow, boosting heat transfer.  

General Characteristics:  

Mechanically wound fins ensure strong adhesion.  

Temperature range: 50°C to 400°C (materialdependent).  

Advantages  

Type L: Low cost, easy maintenance for medium/lowtemperature industries.  

Type LL: High heat flux per unit volume, energysaving.  

Type KL: 20–40% higher efficiency than plain fins, resistant to dust accumulation.  

Shared Benefits:  

Compatible with harsh fluids (dustladen, corrosive gases).  

Flexible installation (horizontal/vertical).  

Applications  

Type L: HVAC systems (condensers, evaporators), industrial waste heat recovery.  

Type LL: Precision cooling (e.g., data center liquid cooling), compact exchangers.  

Type KL: Petrochemical (flue gas heat recovery), power plants (boiler economizers), dusty gas processing.