HTC vacuum manufactures a comprehensive range of flanges such as KF flanges series, ISO flanges series, and CF flanges series, etc. in all standard vacuum flange systems. We manufacture all series vacuum flanges in accordance with ISO standards so they could be compatible with other manufacturers’ flanges and vacuum fiƫngs.
The ISO standard quick release flange is known by the names Quick Flange (QF), Klein Flange (KF) or NW, sometimes also as DN. The KF designation has been adopted by ISO, DIN. KF flanges are made with a chamfered back surface that are attached with a circular clamp and an elastomeric O-ring that is mounted in a metal centering ring. Standard sizes are indicated by the nominal inner diameter in millimeters for flanges 10 through 50 mm in diameter.
The typical KF or NW assembly consists of two identical flanges, a center-ring, and aluminum clamps with a wingnut fastener frequently connect and disconnect without tools.
The construction of ISO flanges series includes two smooth-faced sexless flanges clamped together with a combination metal centering ring and elastomeric O-ring between them.
The high sealing effect and the low leak rates performance of CF flanges connections is a result of gasket material. When assembling the CF Flanges connect, the knife edge is pressed into the flat copper gasket and force the seal material both axially as well as radially outwards to the flanges. The material is enclosed and cannot flow even at high bake out temperature. Due to this deformation of the seal such connections may sometimes stick together. They can be easily separated with a special tool or screwdriver
In addition to an extensive number of standard flange and pipe components, sealing and fastening elements, we also offer flexible vacuum hoses, elastic connections and sight glasses in all flange series.