Vacuum technology LINNEMANN
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Vacuum technology

KF Small flange pipe connections made of aluminium and stainless steel
The KF small flange pipe connections are used especially in the highvacuum technology. They are also suited for gaseous and liquid media. Preferential fields of application are research institutes, laboratories, semiconductor industry, medical technology, measuring and control technology, laser and nuclear technology.

KF Small flange pipe connections made of glass
KF small flange connections made of glass can be easily cleaned because of its smooth surface and therefore they are good for use in applications requiring high standards of purity. Blind flanges can also be used as sight glasses. This makes it possible to perform measurements with IR, UV or visible light. Therefore, small flanges made of glass are often used in chemical and physical laboratories. They are also used for high-frequency and microwave supported applications. KF components made of glass can also be used for electric isolation.

ISO-K Clamping flange pipe connections
The ISO-K clamping flange pipe connections are used especially in the high-vacuum technology. They are also suited for gaseous and liquid media. Preferential fields of application are research institutes, laboratories, semiconductor industry, laser and nuclear technology.

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KF Small flange pipe connections LINNEMANN
KF Small flange pipe connections DIN 28403 + ISO 2861 made of aluminium and stainless steel

KF Small flange pipe connections LINNEMANN
The KF small flange connections from LINNEMANN made both of stainless steel and aluminium as well as glass comply with the Din standard 28403 and the ISO standard 2861.

Small flange connections are used especially for vacuum technology applications. In assembly, the KF centring ring made of stainless steel, aluminium or PTFE materials is arranged together with a fixed KF O-ring between the two KF flanges, either by a KF inner centring ring on the inside of the flange or by a KF outer centring ring on the outside of the flange.
The KF pipe connection system also includes the following vacuum-tested parts:
- KF angle and KF bend
- KF T-pieces and KF cross-pieces
- KF intermediate pieces, KF adapter pieces and KF reducing pieces
- KF blind flanges, KF valves, KF fittings

For connecting KF flanges, in nominal sizes DN10 to DN50, special KF clamping rings or vacuum clamping rings are available for many individual application conditions such as overpressure up to 1.5 bar:
- KF Clamping ring FL-Compact with sheet metal shell of stainless steel
- KF Clamping ring FL-Spezial with sheet metal shell of stainless steel
- KF Clamping ring FL-Optimal AS with die-cast half shells of aluminium
- KF Clamping ring FL-Optimal AE with die-cast half shells of aluminium
- KF Clamping ring FL-Optimal EE with die-cast half shells of stainless steel

KF Spannring FL-Rekord LINNEMANN
KF Clamping ring FL-Rekord with
die-cast half shells of aluminiumKF Spannring FL-Massiv LINNEMANN
KF clamping ring FL-Massiv with
die-cast half shells of stainless steel
KF Spannkette FL-Ultra Spannrollenkette aus Edelstahl
KF Clamping chain FL-Ultra clamping
roller chain of stainless steel



There are also many parts such as flexible KF hoses or KF spring bodies which are used, for example, to dampen vibrations on pumps.

In addition, tubular spring vacuum meters can be used as a reliable indicator.

KF sleeve grinds and KF core grinds are available for laboratory applications.

KF Small flange pipe connections LINNEMANN
KF Small flange pipe connections DIN 28403 + ISO 2861 made of glass

KF Small flange pipe connections LINNEMANN
In assembly, the plastic inner, outer or adapter centring rings are arranged with the O-ring between the two flanges so that the flanges are coaxially centred. Then the clamping ring which is also made of plastic is placed around the flanges and closed until the end faces of the flanges are touching the centring ring. In case of vibration, make sure that spring bodies are used for uncoupling.
ISO-K Clamping flange pipe LINNEMANN
ISO-K Clamping flange pipe connections DIN 28404 + ISO 1609

ISO-K Clamping flange pipe LINNEMANN
ISO-K clamping flanges are installed mainly in high vacuum systems with nominal size from DN63 to DN 250 and sometimes up to DN630. For the connection, the ISO-K inner centring ring is positioned with the ISO-K O-ring and the ISO-K outer support ring between the two clamping flanges.

The clamping flanges and the inner centring ring are therefore coaxially force-centred. The connection is screwed with at least 4 ISO-K clamping screws.
ISO-K clamping flange connections are offered at LINNEMANN in nominal size range DN63 to DN630. The corresponding ISO-K parts are available in addition to the clamping flanges for plant constructions.

- ISO-K Angles
- ISO-K Bends
- ISO-K Adapter
- ISO-K Cross pieces
- ISO-K T-pieces
- ISO-K Reducing pieces
For connecting ISO-K flanges, either ISO-K clamping screws or ISO-K claws are used with which connection can be screwed to a base plate etc.

ISO-K Clamping flange pipe LINNEMANN
ISO-K / KF adapter pieces are available for adaption of KF flanges. The termination can be made with ISO-K blind flanges and ISO-K sight glasses can be used for process inspection. Vibrations are absorbed by the ISO-K spring bodies, flexible connections are achieved with ISO-K metal hoses.

ISO-K fittings are available in different versions:
- ISO-K Bellow seals angle valves
- ISO-K Butterfly valves
- ISO-K Ball valves ES
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