Vacuum Stainless Steel CF Rotatable Blank Flange Blind Flange with Threaded Holes

CF flanges come with either tapped or untapped holes, offering versatility for different applications. Tapped flanges are available with UNC/UNF or metric threading options. These flanges feature through holes, allowing bolts to extend slightly beyond the back of the flange when paired with an untapped flange. Untapped CF flanges can be connected using stainless steel bolts along with either hex nuts or plate nuts. Plate nuts self-align over two adjacent holes and can be easily stabilized with a finger while tightening the bolts. These are available for flange sizes ranging from 1 1/3 to 10 inches (33.96-254mm) in outer diameter. For CF flanges with outer diameters between 2 3/4 and 10 inches (33.96 to 254mm), 12-point bolts can be used instead of standard hex head bolts. In clean room environments, silver-plated bolts are designed to eliminate the need for anti-seize compounds.

product details

Features

The CF flange connection provides a high level of sealing effectiveness and low leak rate, thanks to the gasket material. During assembly, the knife edge of the flange presses into the copper gasket, forcing the seal material to expand both axially and radially towards the flange. This ensures the material is enclosed and prevents any flow, even at high bakeout temperatures. Due to this deformation of the seal, connections may sometimes become stuck, but they can be easily separated with a special tool or a screwdriver.

CF flanges are available in both rotatable and non-rotatable versions, featuring through holes and tapped bolt holes. Metric tapped holes are available upon special request.