... and do not erode steel and copper alloy. 2.Heating ,air-conditioning technology, pneumatics,air compressor, ... :Nominal size:40,50,63,80,100,160Accuracy:2.5,1.6Permissible temperature: When temperature departure is ... mm flats Φ80,Φ100 or Φ160: G 1/2 B (male), 22 mm flats Pressure element:Cu-alloy, ... sector and red mark pointer for heating systems,2.With additional temperature scale for refrigerants in ° ...