Bonded seals (also known as Dowty Seals or Washers) are based on a rectangular section metal washer with a trapezoidal shaped ring of vulcanised rubber bonded to the inside.
Washer Materials: Zinc Plated Mild Steel; 316 Stainless Steel; Brass; Aluminium Alloy; Aluminium Bronze; High Tensile Steel
Rubber Materials: Nitrile; Fluorocarbon; Hydrogenated Nitrile; Fluorosilicone; Silicone; Ethylene Propylene; Aflas
You can choose the material for the washer and the rubbers to best suit the purpose. The seal is primarily used in high-pressure environments where copper washers are unsuitable.
These seals are readily available in Imperial sizes from 1/8 inch to 3 inches. French and German Metric also form part of our extensive stocks at our facility in East Kilbride. For full sizing catalogue with material specifications table please click here.
A further alternative is Self Centralising Bonded Seals which have an extra lip on the ID of the rubber. This centres the seal at its location and will eliminate leaks with the added advantages of easy installation and reduced assembly time.