The KF ranges of flanges and fittings are manufactured from high quality stainless steel. KF flanges utilise an aluminium clamp with a single wingnut fastener allowing frequent disassembly without tools. The vacuum seal is effected by uniform application of pressure by the clamp on the 15 degree surface of the flange. The mating flange surfaces compress an 'O' ring held in place by a metal centering ring to produce a seal that can be used in high vacuum applications and baked to 200 degrees centigrade