PLASMADIAM - Vacuum Components

ISO-K/ISO-F FLANGE SYSTEM ISO-K clamping flange components and ISO-F fixed flange components are described in DIN 28404 and ISO 1609 in nominal diameters DN 63 to DN 630 for ISO-K flanges and to DN 1000 for ISO-F flanges.The connections are suitable for pressures up to 1.10 -8 mbar. With metal seals, the pressure range can be extended to less than 1.10 -9 mbar Metal seals require significantly higher contact forces. Screwed flange connections provide that. If clamp screws are used, their number must be increased if necessary.

The ISO-F flange has a fixed bolt hole circle that is dependent on the nominal diameter. The flanges can be aligned with a hole spacing around the main hole axis. An ISO-F flange can be bolted onto a base plate. As a seal, a centering ring can be used or an O-ring with a sealing groove in the base plate.

An ISO-K and ISO-F compound consists of two symmetrical flanges and one O-ring seal, which is positioned and supported with an inner centering ring and also supported by an outer ring. The required contact pressure for sealing, is created with double claw clamps (Figure C) or screws (Figure D).

Figure C

Figure D

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