Product Range

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.

KF40 - 750mm Long - Flexible Vacuum Hose
SKU: FX40K750
KF Flexible Vacuum Hoses are used to connect parts together when a solid straight connector is impractical or where the two parts move independently and flexibility is required.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF FlexibleVacuum Hoses are supplied in a sealed plastic bag with protective plastic caps.KF Flexible Vacuum Hoses are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 60.25 60.25 GBP
KF50 - 1000mm Long - Flexible Vacuum Hose
SKU: FX50K1000
KF Flexible Vacuum Hoses are used to connect parts together when a solid straight connector is impractical or where the two parts move independently and flexibility is required.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF FlexibleVacuum Hoses are supplied in a sealed plastic bag with protective plastic caps.KF Flexible Vacuum Hoses are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 95.56 95.56 GBP
KF50 - 250mm Long - Flexible Vacuum Hose
SKU: FX50K250
KF Flexible Vacuum Hoses are used to connect parts together when a solid straight connector is impractical or where the two parts move independently and flexibility is required.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF FlexibleVacuum Hoses are supplied in a sealed plastic bag with protective plastic caps.KF Flexible Vacuum Hoses are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 70.20 70.2 GBP
KF50 - 500mm Long - Flexible Vacuum Hose
SKU: FX50K500
KF Flexible Vacuum Hoses are used to connect parts together when a solid straight connector is impractical or where the two parts move independently and flexibility is required.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF FlexibleVacuum Hoses are supplied in a sealed plastic bag with protective plastic caps.KF Flexible Vacuum Hoses are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 99.63 99.63 GBP
KF50 - 750mm Long - Flexible Vacuum Hose
SKU: FX50K750
KF Flexible Vacuum Hoses are used to connect parts together when a solid straight connector is impractical or where the two parts move independently and flexibility is required.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF FlexibleVacuum Hoses are supplied in a sealed plastic bag with protective plastic caps.KF Flexible Vacuum Hoses are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 162.00 162.0 GBP
KF10/16 Stainless Steel Reducing Centering Ring with Viton O-Ring
SKU: KF10/16SVRCR

KF10/16 Stainless Steel Reducing Centering Ring with Viton O-Ring

KF Stainless Steel Reducing Centering Rings are used to connect two flanges of different internal sizes. This creates a vacuum seal with the use of a clamp.

Manufactured from 304 stainless steel and Viton. KF Stainless Steel Reducing Centering Rings are supplied in a sealed plastic bag.

KF Stainless Steel Reducing Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products.
KF10 Aluminium Centering Ring with Viton O-Ring
SKU: KF10AVCR
KF Aluminium Centering Rings with Viton O Rings are used to connect two flanges together and create a vacuum seal with the use of a clamp.

Manufactured from Aluminium and Viton. KF Aluminium Centering Rings are supplied in a sealed plastic bag.

KF Aluminium Centering Rings are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 2.99 2.99 GBP
KF10 Blank Flange
SKU: KF10BS
KF Flanges (Klien) are the standard din 28430 & ISO 2861 connections for vacuum fittings up to DN50 used in low & 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 circumferental clamp.KF Blank Flanges points:Material: 304L stainless steelBakeable to 150° CVacuum Rating: 1×10-8 mbarWide range of elbows, crosses & tees are availableTubulated Flanges are available for welding to stainless steel tubeKF 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.
£ 3.25 3.25 GBP
KF10 Stainless Steel Centering Ring with Viton O-Ring
SKU: KF10SVCR
KF Stainless Steel Centering Rings with Viton O-rings are used to connect two flanges together and create a vacuum seal with the use of a clamp.Manufactured from 304 stainless steel and Viton. KF Stainless Steel Centering Rings are supplied in a sealed plastic bag.KF Stainless Steel Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products
£ 2.49 2.49 GBP
KF16 Aluminium Centering Ring with Viton O-Ring
SKU: KF16AVCR
KF Aluminium Centering Rings with Viton O Rings are used to connect two flanges together and create a vacuum seal with the use of a clamp.

Manufactured from Aluminium and Viton. KF Aluminium Centering Rings are supplied in a sealed plastic bag.

KF Aluminium Centering Rings are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 2.99 2.99 GBP
KF16 20mm Bored Flange
SKU: KF16B20
KF Flanges (Klien) are the standard din 28430 & ISO 2861 connections for vacuum fittings up to DN50 used in low & 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 circumferental clamp.KF Bored Flanges points:Material: 304L stainless steelBakeable to 150° CVacuum Rating: 1×10-8 mbarWide range of elbows, crosses & tees are availableTubulated Flanges are available for welding to stainless steel tubeKF 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.
£ 4.98 4.98 GBP
KF16 Blank Flange
SKU: KF16BS
KF Flanges (Klien) are the standard din 28430 & ISO 2861 connections for vacuum fittings up to DN50 used in low & 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 circumferental clamp.KF Blank Flanges points:Material: 304L stainless steelBakeable to 150° CVacuum Rating: 1×10-8 mbarWide range of elbows, crosses & tees are availableTubulated Flanges are available for welding to stainless steel tubeKF 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.
£ 2.85 2.85 GBP
KF16 Clamp - Aluminium
SKU: KF16C
KF Clamps Aluminium are used to clamp two flanges to a Centering ring and an O Ring creating a vacuum seal.

KF Clamps Aluminium are manufactured from aluminium and are supplied in a sealed plastic bag.

KF Clamps Aluminium are manufactured to the ISO standard and are compatible with other supplier’s products.
£ 1.99 1.99 GBP
KF16 to KF10 Tubulated Reducing Adaptor
SKU: KF16R10
KF Tubulated Reducing Adaptors are used to change the size of a tube or flange from one size to another. This enables mismatched components to be fitted together.Manufactured from: 304 Stainless Steel. Helium Leak tested to 10-8 mbar. KF Tubulated Reducing Adaptors are supplied in a sealed plastic bag with protective plastic caps.KF Tubulated Reducing Adaptors are manufactured to the ISO Standard. They are compatible with other suppliers’ products.
£ 14.29 14.290000000000001 GBP
KF16 Stainless Steel Centering Ring with Viton O-Ring
SKU: KF16SVCR
KF Stainless Steel Centering Rings with Viton O-rings are used to connect two flanges together and create a vacuum seal with the use of a clamp.Manufactured from 304 stainless steel and Viton. KF Stainless Steel Centering Rings are supplied in a sealed plastic bag.KF Stainless Steel Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products
£ 2.10 2.1 GBP
KF16 Stainless Steel Meshed Centering Ring with Viton O-Ring
SKU: KF16SVCRM
KF Stainless Steel Reducing Centering Rings are used to connect two flanges of different internal sizes. This creates a vacuum seal with the use of a clamp.

Manufactured from 304 stainless steel and Viton. KF Stainless Steel Reducing Centering Rings are supplied in a sealed plastic bag.

KF Stainless Steel Reducing Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products.
£ 13.50 13.5 GBP
KF16 SS Trapped Centering Ring with Viton O-Ring
SKU: KF16SVCRT

KF16 Trapped Centering Ring with Viton O-Ring

KF Trapped Centering Rings with Viton O-rings are used to connect two flanges together and create a vacuum seal with the use of a clamp they also provide for cases of slight over pressure. Manufactured from 304 stainless steel, Aluminium and Viton. KF Trapped Centering Rings are supplied in a sealed plastic bag. KF Trapped Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products
£ 5.95 5.95 GBP
KF20/25 Stainless Steel Reducing Centering Ring with Viton O-Ring
SKU: KF20/25SVRCR

KF20/25 Stainless Steel Reducing Centering Ring with Viton O-Ring

KF Stainless Steel Reducing Centering Rings are used to connect two flanges of different internal sizes. This creates a vacuum seal with the use of a clamp.

Manufactured from 304 stainless steel and Viton. KF Stainless Steel Reducing Centering Rings are supplied in a sealed plastic bag.

KF Stainless Steel Reducing Centering Rings are manufactured to the ISO standard and are compatible with other supplier’s products.
KF25 Aluminium Centering Ring with Viton O-Ring
SKU: KF25AVCR
KF Aluminium Centering Rings with Viton O Rings are used to connect two flanges together and create a vacuum seal with the use of a clamp.

Manufactured from Aluminium and Viton. KF Aluminium Centering Rings are supplied in a sealed plastic bag.

KF Aluminium Centering Rings are manufactured to the ISO Standard and are compatible with other supplier’s product.
£ 2.99 2.99 GBP
KF25 28mm Bored Flange
SKU: KF25B28
KF Flanges (Klien) are the standard din 28430 & ISO 2861 connections for vacuum fittings up to DN50 used in low & 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 circumferental clamp.KF Bored Flanges points:Material: 304L stainless steelBakeable to 150° CVacuum Rating: 1×10-8 mbarWide range of elbows, crosses & tees are availableTubulated Flanges are available for welding to stainless steel tubeKF 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.
£ 6.20 6.2 GBP