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Bonded Seal is made of rubber ring and metal ring, which is used to seal the connection between thread and flange. It includes a metal ring and a rubber gasket.Metal ring rust treatment, rubber ring is generally used oil - resistant NBR or fluorine rubber.The combined pads are available in metric and Inch sizes, and the combined form of metal pad and rubber is specified in standard JB982-77.Combined seal gasket for threaded pipe joint and plug seal, it is generally used together with the clamped pipe joint, used to plug the oil port, mainly used for hydraulic valve pipe joint thread end face static seal, suitable for British, American standard inch thread and French, German standard metric thread joint end face static seal.The combination seal gasket can be divided into Type BS ａnd Type SCR according to the structure form.

The bonded seal was originally designed to instead of copper，also called a Dowty Washer.It represent a combination of metal washer  & elastomer sealing lip vulcanised to the edge of the metal part to seal bolted connections & mounting elements in all industrial applications...