... materials, including PVC banner,house tarpaulin, swimming pool for PVC membrane, membrane structure, oil container boom and high speed roller door, water ... , 220V±10%Rated Power: 5KW Frequency: 27.12MHz ±0.5% Working Pressure: 2-4KgCooling: Air coolingAir Requirement: 6 barCertification: CE Continuous High Frequency Welding machine