Bonded Seals – Dowty Seals
Bovill & Boyd have been supplying Bonded Seals to various industries for over 30 years and carry a large stock of standard seals that are available off the shelf ready for delivery.
Bonded seals (also known as Dowty Seals or Dowty Washers) are based on a rectangular section metal washer with a trapezoidal shaped ring of vulcanised rubber bonded to the inside. The metal ring resists the bursting forces and limits the deformation of the rubber sealing element. The seal is primarily used in high-pressure environments where copper washers are unsuitable. Both the metal washer and the rubber material can be selected to suit a given application.
Washer Materials: Mild Steel; Stainless Steel; Brass; Aluminium Bronze; Aluminium Alloy; High Tensile Steel.
Surface Finish: Zinc Plating; Gold Passivate; Cadmium Plating; Chromic Anodise; Sulphuric Anodise; Clear Passivate; Zinc/ Iron and Black Chromate; Zinc Nickel Trivalent Passivate.
Rubber Materials: NBR (Nitrile); HNBR ( Hydrogenated Nitrile); EPDM; FKM (Viton); CR (Chloroprene); Fluorosilicone; Polyacrylate.
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.
Bovill & Boyd can provide bonded seals to meet the requirements of a wide range of applications including Aerospace specifications, Drinking Water applications, Gas applications and Automotive specifications.
The rubber sealing ring is mostly supplied in black but coloured compounds can be supplied on request.
Bonded seals / Dowty Seals or Dowty Washers
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 due to seal offset with the added advantages of easy installation and reduced assembly time.
Should you require more technical data or material specifications or would like some assistance in choosing the correct materials for your application then please contact our Sales Team on 01355 907161.