KF Blank Flange

KF Blank Flanges are designed to securely close unused ports in vacuum and high-vacuum systems. They provide a reliable, vacuum-tight termination of standard ISO-KF flange connections when used with a suitable centring ring, O-ring seal, and KF clamp.

Manufactured from high-quality stainless steel or aluminium, these blank-off flanges feature the standard KF sealing geometry for compatibility with ISO-KF (QF / NW) vacuum components. Their compact design allows quick installation and removal without special tools.

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 Sizes: DN10, DN16, DN25, DN40, DN50 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)

Design: Blank flange without through-hole

Sealing: Elastomer O-ring with compatible KF centring ring

Applications

KF Blank Flanges are commonly used to close unused vacuum chamber ports, vacuum manifolds, pumping lines, and instrumentation connections. They are suitable for laboratory vacuum equipment, research facilities, and industrial vacuum systems.

The flanges can be installed and removed quickly using a standard KF clamp, making them ideal for vacuum systems requiring frequent reconfiguration or temporary port closure.

Installation and Compatibility

Compatible with standard ISO-KF flange connections of the corresponding nominal size. A suitable KF centring ring with O-ring seal and a KF clamp are required for installation and are available separately.