... Brazed Plate Heat Exchanger, Double Wall Plate Heat Exchanger, Dual Wall Heat Exchanger, CE, UL, TUV,ISO9001:2000 Technical parameterProduct nameDouble Wall Brazed Plate Heat Exchanger, Double Wall Plate Heat Exchanger, Dual Wall Heat Exchanger,CE ... Acceptable Airtightness Tester GPT-6 8 2.0 Acceptable Production Flow: 1.Metal Parts Punching 2.Ultrasonic Washing 3.Assembly 1 ...