Different flanges are used for QVF type, SCHOTT type or XTRONG type glass ends. Adapter backing flanges are used with glass ends to connect glass to non-glass ends, having different bolt configuration and PCD.Backing Flanges in sizes NB 100 to NB 450 are also available in split design.Bellow flanges are used with PTFE bellows to connect the bellows and the glass. Adapter bellow flanges are used with Teflon bellows to connect the bellows to non-glass ends, having different bolt configuration and PCD. All these flanges are in cast iron to IS 210 grade 20 duly machined. Optionally, the flanges can be ordered in Aluminum alloys, Stainless Steels or plastics. The flanges can be supplied epoxy coated for better corrosion resistance or electro plated for improved earthing properties. Inserts are made from graphitized compressed asbestos sheet and are fitted between the flanges and the glass buttress ends. Non asbestos inserts are also available. NOTE: NB refers to nominal bore of glass tube.
Backing flanges are used to connect glass ends.