A Subject to change without prior notice 6 March 2021 Vacuum technique In order for vacuum systems to provide reliably stable suction performances, the pipe connections must guarantee long-term tightness even at high vacuum. Depending on the medium, LINNEMANN offers the required stainless steel, aluminium or glass components in accordance with standards DIN 28403 ISO 2861 for the KF small flange connections and DIN 28404 ISO 1609 for ISO-K clamping flange connections. Required flexible connections can be supplemented from the hose program. LINNEMANN offers metal hoses as well as hoses with support spirals, which are assembled appropriately and can therefore be integrated safely. Where disc or ball valves are required for control or for extraction, for example, various systems are available. The mechanically operating vacuum gauges can be used as robust, corrosion-resistant vacuum gauges. KF Small flange pipe connections DIN 28403 + ISO 2861 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. 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
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