Vacuum Bellows

Vacuum Bellows Perform 100% Helium Leak Test

Size range: DN10 to 300

Types: KF (NW), CF, LF (ISO)

Material: SS304, SS316L


  • aerospace vacuum equipment
  • vacuum pump series
  • semiconductor
  • other fields
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Size: DN10-300
Medium: air
Bellows Material: stainless steel 304
Thickness: 0.12 – 0.4 mm
Connection: KF(NW) , CF, LF(ISO-K or ISO-F) flange
Flange material: stainless steel 304
Bellows standard: GB/T 14525-2010 or GB/T 12777-2008
Flange standard: GB/T 6070-2007, GB/T 4982-2003
Length: 100, 200 ,300 ,500 ,1000, 2000, 3000 mm
Packing Details: plastic bag/carton/plywood case


  1. Vacuum bellows hose can bend to compensate for the positional deviation caused by the installation of the pipeline system, and to bear the relative displacement required for two points of non-operation.
  2. At the same time, it also plays the role of vibration reduction and noise elimination.

Wording conditions:

  • Working temperature: -196 to 450 °C
  • Vacuum bellows material: SS304 or SS316L


Aerospace, Vacuum Equipment, Vacuum Pump Series, Semiconductor etc.


Leakage rate: 2×10-10 Pa·M3/s
Welding seam: Passivated
Test: helium leak inspection
Maximum allowable working pressure: 1.0 MPa