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ISO-K vacuum components are standardized large-flange vacuum connections widely used in high-vacuum systems. They are designed to provide secure, leak-tight connections between chambers, pumps, valves, pipes, and instrumentation while allowing easier assembly and maintenance than many fully bolted alternatives. ISO-K and ISO-F components are described in ISO 1609 and DIN 28404, and ISO-K flanges are commonly joined with claw clamps and centering rings.
These components play an important role in industries where stable vacuum performance matters, including semiconductor processes, research and development, analytics, coating systems, and scientific laboratories. Vacuum technology supports applications such as semiconductor etching and cleaning, material science research, electron microscopy, and laboratory instrumentation.
At Anadolu Vacuum, our ISO-K standard vacuum components are developed for customers who need reliable quality, practical compatibility, and responsive supply. We focus on delivering vacuum components that combine precision manufacturing, dependable sealing performance, and value for advanced industrial and research environments.
Technical Overview
What is the ISO-K standard?
ISO-K is a vacuum flange standard used for detachable high-vacuum connections in larger nominal sizes than KF. ISO-K clamping flange components are covered by ISO 1609 and DIN 28404. They are designed for pressures suitable for the high-vacuum range, and the connection is typically made using claw clamps with a centering ring and O-ring between the flange faces.
A practical advantage of ISO-K is that the flanges can be aligned around the main axis, while the outer retaining ridge helps prevent clamp slippage during assembly.
How ISO-K differs from other common standards
– ISO-K is ideal for larger high-vacuum connections where robust, serviceable assembly is important. It uses claw clamps and centering rings.
– ISO-F shares the same standards family but uses a fixed-hole bolted pattern rather than claw clamps.
– KF (ISO-KF) is used for smaller flange sizes and is valued for very fast assembly with clamping rings. KF components are described in ISO 2861 and are commonly used from DN 10 to DN 50.
– CF (ConFlat) is the preferred releasable connection for ultra-high vacuum systems, using metal sealing with copper gaskets and knife-edge flanges. CF systems are suitable where higher bake-out temperatures and stricter UHV sealing are required.
