KF Straight Reducing Nipple

The KF Straight Reducing Nipple provides a compact and reliable connection between ISO-KF vacuum flanges of different nominal diameters. Its straight, coaxial design allows vacuum components and piping of different sizes to be connected within a single vacuum assembly.

Manufactured from high-quality stainless steel or aluminium, the reducing nipple offers robust construction for vacuum and high-vacuum applications. Unlike conical reducing nipples, this version features a straight, stepped reduction between the two flange sizes, making it particularly suitable for compact vacuum assemblies where installation length is limited.

Available in stainless steel 1.4301 (AISI 304), 1.4404 (AISI 316L), and aluminium 3.2315 (EN AW-6082), providing material options for different vacuum system requirements.

Technical Specifications

Flange Size Combinations: DN25/16, DN40/16, DN40/25, DN50/16, DN50/25, DN50/40 KF

DN25/16 Length Options: 28 mm and 40 mm

Materials: Stainless Steel 1.4301 (AISI 304), Stainless Steel 1.4404 (AISI 316L), Aluminium 3.2315 (EN AW-6082)

Flange Connection: ISO-KF (QF / NW)

Configuration: Straight reducing nipple with two coaxial KF flange connections of different nominal diameters

Design: Straight, stepped reduction

Sealing: Compatible KF centring rings with elastomer O-ring seals

Applications

Suitable for vacuum chambers, vacuum pumps, pumping lines, vacuum manifolds, laboratory vacuum equipment, and industrial vacuum systems requiring transitions between different KF flange sizes.

The straight reducing nipple is particularly useful for connecting vacuum components of different nominal diameters where a compact, rigid connection is required.

Installation and Compatibility

Compatible with standard ISO-KF flange connections of the corresponding nominal sizes. Each connection requires a suitable KF centring ring with O-ring seal and a KF clamp.

Compatible KF Centring Rings & Seals and KF Clamps are available separately.

For applications requiring a gradual diameter transition, the KF Conical Reducing Nipple is also available.

The achievable vacuum pressure and operating temperature depend on the selected sealing components and operating conditions.