KF Fittings


The KF ranges of flanges and fittings are manufactured from high quality stainless steel. KF flanges utilize an aluminium clamp with a single wingnut fastener allowing frequent disassembly without tools.

The vacuum seal is effected by uniform applications of pressure by the clamp on the 15° surface of the flange. The mating flange surfaces compress an ‘O’-ring (held in place by a metal ring) to produce a seal that can used in vacuum applications down to 10-8 mbar and baked to 200°C (sustained to 150°C)

Advanced sealing material such as aluminium or copper may be used, when the joints have to be operated or baked at elevated temperatures or if high corrosion resistance and/or electrical insulation are required.

Our vacuum components are bead-blasted inside and outside, unless otherwise stated. The sealing faces are polished mechanically.

All components are subjected to a leak testing protocol.

KF16 20mm Bored Flange
SKU: KF16B20
KF Flanges (Klien) are the standard DIN 28430 and ISO 2861 connections for vacuum fittings up to DN50 used in low and high vacuum. Along with the ancillary components, they offer a simple solution for applications requiring easy and repeated assembly. Sealing is accomplished with a centering with a nitrile or Viton O-ring squashed between a pair of KF Flanges and pulled together using a circumferential clamp. KF Bored Flanges points: • Material: 304L Stainless Steel • Bakeable to 150°C • Vacuum Rating: 1×10-8 mbar • Wide range of elbows, crosses and tees are available • Tubulated Flanges are available for welding to stainless steel tube KF Bored flanges are used for welding onto tube to produce ports and connectors when manufacturing fabrications. Manufactured from: 304 Stainless Steel. KF Bored flanges are supplied in a sealed plastic bag with a protective plastic cap. KF Bored flanges are manufactured to the ISO Standard and are compatible with other supplier’s product. ...more
KF16 Blank Flange
SKU: KF16BS
KF Flanges (Klien) are the standard DIN 28430 and ISO 2861 connections for vacuum fittings up to DN50 used in low and high vacuum. Along with the ancillary components, they offer a simple solution for applications requiring easy and repeated assembly. Sealing is accomplished with a centering with a nitrile or viton O-ring squashed between a pair of KF Flanges and pulled together using a circumferential clamp. KF Blank Flanges points: • Material: 304L Stainless Steel • Bakeable to 150° C • Vacuum Rating: 1×10-8 mbar • Wide range of elbows, crosses and tees are available • Tubulated flanges are available for welding to stainless steel tube KF Blank flanges are used to cap off the open ports where not required and are also used as a base part to manufacture adaptor fittings, instruments, feedthroughs etc. Manufactured from: 304 Stainless Steel. KF Blank flanges are supplied in a sealed plastic bag with a protective plastic cap. KF Blank flanges are manufactured to the ISO Standard and are compatible with other supplier’s product. ...more