Vacuum Bellows

As a stainless steel vacuum bellows supplier we supply full size range from 10 to 100, which is widely used in aerospace, vacuum equipment, vacuum pump series, semiconductor and other fields.

Before 2018 we also sold vacuum bellows to the local market, but mainly the bigger sizes. Because the welding of thin wall thickness bellows is not easy, it needs to solve at least 3 difficulties: stainless steel strip purchase, tube welding machine, skilled welder. Through a period of preparation, now we can easily weld SS strips with thicknesses of 0.12 mm and above in our own factory. Combined with our large quantity of bellows stocks, we can complete any order in a very short time.

Our Advantages:

  • 100% Helium Leak Testing
  • Japanese Advanced Welding Technology
  • Customized Lengths Available
  • Large Inventory, Fast Delivery
  • Easy Installation
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vacuum bellows tube


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