KF Conical Reducing Nipple

The KF Conical Reducing Nipple provides a compact and reliable transition between ISO-KF vacuum flanges of different nominal diameters. Its conical design creates a gradual change in internal diameter, allowing vacuum components and piping of different sizes to be connected without additional adapters.

Manufactured from high-quality stainless steel or aluminium, the reducing nipple offers robust construction for vacuum and high-vacuum applications. The tapered internal geometry provides a smoother transition between different tube diameters compared with a straight reducing nipple, making it particularly useful for vacuum pumping lines and compact vacuum assemblies.

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

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: Conical reducing nipple with two KF flange connections of different nominal diameters

Design: Tapered reduction between different KF flange sizes

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 connections between different nominal diameters.

The conical reducing nipple is particularly useful for connecting larger pumping lines to smaller vacuum components while maintaining a compact and mechanically robust flange connection.

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 where a straight reduction is preferred, the KF Straight Reducing Nipple is also available.

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