KF Single Pin Clamp(Ss)

KF

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ISO Blank Flange

KF

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ISO Bored Blank Flange

ISO

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ISO Bored Blank Bolted Flange

ISO

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ISO Bored Blank Bolted Flange- Tapped

ISO

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ISO Single Wall Clamp(Al)

ISO

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ISO Single Wall Clamp(Ss)

ISO

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ISO Double Wall Clamp(Al)

ISO

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CF Blank Flange

CF

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CF Blank Tapped Flange

CF

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CF Bored Blank Flange

CF16

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CF Bored Blank Flange

CF35

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CF Bored Blank Tapped Flange

CF16

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CF Bored Blank Tapped Flange

CF35

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CF Rotatable Blank Flange

CF

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CF Rotatable Blank Tapped Flange

CF

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CF Rotatalbe Bored Blank Flange

CF

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CF Rotatable Bored Blank Tapped Flange

CF

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CF Copper Gasket

CF

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CF Plate Nut

CF

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KF Flange Series

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The Small flange or KF standard (DIN 28403, ISO 2961) is the standard connection for vacuum pipes up to the nominal diameter of DN50 used in low, fine and high vacuum. A seal is positioned between the flanges. The seal consists of a centering ring and the O-ring stretched upon. The flanges are held together by a clamp. The clamp has an inclined interior surface adequate to the conical outer surface of the flanges. Usually centering rings and standard clamps are used with wing nuts. They enable a quick and easy assembly without any tools. Trapped centering rings and special clamps or clamp chains are offered for special applications. Claw clamps or so-called bulkhead clamps are available for wall mounting.

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ISO Flange Series

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ISO KF vacuum systems employ components with metric interface dimensions which have been defined by the International Standards Organisation (ISO).This ensures a high degree of compatibility between components obtained from different sources. EFT Vacuum ISO KF are compatible with Klein Flange (KF) types. Use ISO KF for tube sizes DN16 to DN50. Our standard range of KF flanges and fittings are manufactured from 304 (1.4301) stainless steel. Maximum temperature for sustained use is 150°C. They are ideal for vacuum systems requiring regular assembly and disassembly. Each vacuum seal is made by compression of an O-ring on a centring ring between mating flanges. The seal is made in seconds by finger-closure of a wing nut on the all-metal hinged aluminium clamp. The ISO KF family of modular building block components includes all commonly used standard fittings, feedthroughs and accessories. Reducing flanges are available to connect different size components. Mating flanges are offered to interface with pipe and other flange systems including LF and CF.

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CF Flange Series

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The generation of ultra high vacuum (UHV) makes great demands on the material and connections. Therefore the CF standard was created in the UHV technology (ISO 3669; enhancement ISO/TS 3669-2). CF flanges are manufactured from circular blanks of stainless steel on CNC machines. Rotatable flanges are bipartite and consist of an inner part with the seal face and an outer part with the bolt holes. CF flanges have an annular groove on the vacuum side for the reception of the gasket and a knife-edge. EFT provides CF flanges and components of the dimensions DN10 to DN250 according to the pre-norm ISO/TS 3669-2. Please consider that individual standards of institutions are also available in the market. Please add the auxiliary dimensions (DN25, DN50, DN75, DN125) in case of requests and offers of CF flanges and components. In addition please add the size and the number of required bolts and the necessary copper gasket for dimensions from DN250. EFT follows the widely used convention of categorising different sizes of UHV flange by using a ‘DN’ specification.‘DN’ is the acronym of the French term ‘Diamètre nominal’ which translates as ‘Nominal bore’. The bore referred to is that of the tube that fits inside the designated flange. The bore is ‘nominal’because of the variation in tube wall thickness.

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