high frequencyfabric welding machine 1.NL-5557 anti-spark vacuum tube protection device; 2.With double sides skates, accurate position and flexible action; 3.Usage: PVC material high frequency welder is suitable for single and double sides plastic packings, printing and leather printing; 4. Parameters: ModelWS-4000SWS-5000SWS-8000SWS-10000SWS-15000SPower Output4000W5000W8000W10000W15000WVoltage50/60HZ AC380V 3PPower Input7KVA9KVA15KVA18KVA25KVARectifierSILICON RECTIFIEROscillation Tube7T84RB7T85RB/E31857T69RBE30698T85RB/E3130Anti-Spark Thyratron TubeNL5557Pressure WayAir PressureGap of Electrodes250mm150mm150mmDimension of Upper Board200*350200*350400*600600*800700*900Dimension of Lower Board400*600400*600600*800800*1000800*1000Overall Dimension660*1350*1730660*1350*17301000*1800*25001000*1800*25001000*1800*2500Net Weight400KG400KG500KG700KG900KG