PURGING
Proper purging is absolutely essential to guarantee high-quality welding of high-alloyed, corrosion-resistant components. Our Oxy EVO oxygen analyser can be connected to our orbital welding controllers for the purpose of inspecting and documenting the residual oxygen content and evaluated. You are free to choose the value in ppm entered in the controller.
Unless specified otherwise, a value < 30 ppm is generally sufficient for starting welding. The controller will not allow welding to commence until the measured value drops below the entered value. The equipment is calibrated so that it measures with an accuracy of +/- 2 ppm in the welding-related area below 30 ppm in the case of inert gases.
Analysers that display values as percentages are not recommended ➝ 0.1% = 1,000 ppm!
Purging Accessories
Purge bungs
- Conical
- hole: 6 mm (0.236″) diameter
- Material: Silicone, clear
- Temperature-resistant up to 250 °C
Item number: 1.3.55+XX
Purge bung set
For an ID of 47 – 107 mm (1.850 – 4.213″) (9 x 2 bungs) in a case
Item number: 1.3.5502
Purge bung set
For an ID of 10.5 – 49 mm (0.413 – 1.929″) (10 x 2 bungs) in a case
Item number: 1.3.5501
Purge hose with shut-off valve, 8 m
Item number: 1.3.0126
Sintered metal vent
(Suitable for silicone bungs with 6-mm hole from an inner tube diameter of 15 mm)
Item number: 1.3.0127
Aluminium adhesive tape
6 x 15 x 48 mm
Item number: 1.1.4129
Flexible purge dams
- Saves gas and time
- Heat resistant up to 340 °C
- Can be used in all positions
- Easy to pull through tube elbows
SC Profi, fully assembled with 2 lip seals (340 °C), connecting axis and connecting hose with a type-21 Rectus nipple
Item number: 1.1.60+XXX
Coupling for flexible purge dam / purge hose, 6 mm OD
Measuring connection for flexible purge dam to OXY
(from SC Profi diameter 57) on request
Item number: 1.1.6234