SWT-NS900 Geomembrane welding machine Steel pressure roller available. Copper hot wedge and steel hot wedge are optional. Double hot wedge default and single hot wedge optional. It can weld geo-membrane of various thickness and are applicable for welding of all thermal-fused material such as LDPE, PVC, HDPE, EVA, PP and PVC,HDPE,EVA,PP. The control of this series adopt PID automatic thermostatic control with high control and low temperature fluctuation. Speed control of this series adopt PWM automatic voltage and regulation speed circuit. Direct current servo the motor drive with great output torque and staple performance in walking. It can maintain a constant speed on the condition of creeping, vertical creeping and road load. Also this series of welding machine are stable in performance despite of external temperature and voltage variation.This series of welding machine is excellent in performance and easy for operating, with high welding speed and good work quality. It is extensively used in engineering projects such as expressways, tunnels, reservoirs, waterproof of construction. Technical Parameter Output Voltage:220V Frequency:50Hz Power:1800W Welding speed:0.5~5m/min Heating temperature:0~450℃ The thickness of welding material:1.0mm~3.0mm(Single layer) Welding width:15mm×2 Interior Cavity :15mm Welding intention≥85%Maternity material(Resistance to the direction of cutting) Joint width:12cm Machine weight:13kg International warranty 24 months. Any parts broken or does not work under normal operating,we are free to provide.