Federungskörper DN 25 KF VA – Stainless Steel Vacuum Bellows, ISO-KF DN25

The DN 25 KF stainless-steel Federungskörper (vacuum bellow/suspension body) is a flexible metal hose with ISO-KF (DN25) flanges. Constructed from corrosion-resistant 1.4301 (flanges) and bellows made of 316Ti stainless steel, it provides vibration compensation, stress relief, and alignment flexibility in vacuum and low-pressure systems (-1×10⁻⁸ to 5×10² hPa) at temperatures from –196 °C to +300 °C  . Common lengths include 60 mm, 70 mm, 79–80 mm, and 100 mm.

Key Features:

• Nominal Size: DN 25 KF (ISO-KF flange, Ø 40 mm outer)

• Material:

  • Flanges: Stainless steel 1.4301 (AISI 304)

  • Bellows: Stainless steel 316Ti (1.4571)  

• Typical Lengths: 60 mm, 70 mm, 79 mm, 100 mm

• Performance Range: Ultra-high vacuum compatible to low overpressure (~0.1 bar)  

• Temperature Range: –196 °C to +300 °C  

• Axial Flexibility: Typically ±5 mm for DN25 length ~80–100 mm