In a large-scale municipal landfill lining and reservoir containment project in South America, project engineers faced severe weather conditions—high dust levels, fluctuating ambient temperatures, and mixed membrane installations (including both HDPE and flexible PVC sheets). Standard hot wedge welders struggled with thermal loss, roller slippage, and material sticking during continuous seam welding.

To solve these challenges, the contractor deployed the SWT-NS700 Geomembrane Welder. Unlike conventional hot wedge welders, the SWT-NS700 utilizes advanced forced hot air heating technology, delivering air-tight dual-track seams while overcoming ambient dust and material sensitivity issues.

The SWT-NS700 was introduced specifically to eliminate the direct-contact drawbacks of traditional hot wedge machines. By substituting a physical copper wedge with an high-output hot air blower system, the SWT-NS700 changed the dynamics of field lining operations:

Instead of scraping against the membrane, the SWT-NS700 directs a controlled, high-temperature hot air stream into the overlapping seam area. This provides continuous thermal penetration without burning, sticking, or scratching sensitive polymers like PVC or EVA.

Forced hot air actively purges micro-dust particles from the immediate seam surface prior to pressing, preventing particle inclusions inside the weld bond.

Equipped with a digital display, PID automatic constant temperature regulation, and a PWM motor drive circuit, the machine maintains steady target temperatures and constant travel speed even under variable voltage or creeping slope loads.

For anti-seepage projects involving diverse geomembrane materials (especially PVC and EVA) or challenging ambient conditions (dusty, windy, or variable outdoor weather), the SWT-NS700 Hot Air Geomembrane Welder provides a far more resilient alternative to traditional hot wedge units. Its non-contact heating mechanism ensures smooth, high-strength welds without the risk of material thermal damage or wedge fouling.