Use high pressure nitrogen double pressure, double station system, pressure resistance is 4.15Mpa--4.5Mpa, hardware design pressure is not less than 5.0MPa
Pre-draining and Filling
It is used to remove air and nitrogen from the cavity of the workpiece to be tested to reduce the dilution of helium and improve the sensitivity of leak detection.
All the space of the workpiece to be inspected can be quickly filled when filling; the vacuum leak detection is performed once again on the soft seal of the workpiece. If the vacuum of the workpiece does not reach the set value, there will be an audible and visual alarm and a large leak indication on the screen. The degree of vacuum is ≤ 20Pa.
Filling pressure 1MPa-1.5Mpa, hardware design pressure is not less than 2.5MPa.
After each leak detection, the helium gas charged into the inside of the tested piece is recycled to the pressure tank to reduce the consumption of helium gas and reduce the cost of single piece leak detection.
Helium recovery rate: ≥98%, which is the overall recovery rate of helium in the workpiece and system; the residual helium pressure in the helium cylinder is not higher than 0.2MPa.
Helium Pressurized Storage and Concentration Detection
Recycling and storing helium; when the recovered helium pressure exceeds the set value, the system automatically exhausts to the atmosphere to the set value to ensure equipment safety.
Automatically monitor the radon concentration at regular intervals or manually monitor the radon concentration at any time. During the automatic monitoring, if the concentration is not enough, the alarm will be prompted. When the alarm is lower than 70%, the system automatically replenishes the pure sputum, press “Change deflation” and automatically fill the function.