Bonded Seals/Bonded Washers

Product Overview

Bonded Seals were originally designed to replace copper type washers in high pressure systems. The bonded seal comprises of a metal washer (square or rectangular in section), to which a trapezoidal elastomeric ring is bonded. The advantages of this system is that the metal washer resists the bursting forces applied and also limits any deformation of the elastomeric element. The metal washer also limits the compression of the seal and eliminates any over torque of the joint.

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Bonded Washer

Bonded Seals

  • Reliable high and low pressure sealing
  • Wide temperature capability
  • Over compression prevented by metal outer ring
  • Wide range of metals and elastomers
  • Available in a wide range of imperial and metric sizes
Bonded Washer Centred

 

Self-Centering Bonded Seals

The self-centering type of bonded seal has the additional benefit of pre-assembling on to threads. The thin seal membrane offers little resistance during assembly.

  • All key benefits of original design
  • Concentrically located
  • Positively retained
  • Ability to pre-assemble
  • Can be automatically installed

Part Number Format

Bonded Seals Part No. Format

Elastomeric Material Options
Compound ReferenceElastomeric Materials / Shore Hardness

4490

NBR 90

9775

FKM 75
Metal Outer Ring Options
Metal ReferenceMetal Type
41

Mild Steel Zinc Plated

74

Stainless Steel Type 316

Other metal options as well as elastomeric options available on request

Common Sizes

BSPStandardSelf CenteringID (Lip)
+/- 0.13
ID (Metal Ring)
+/- 0.14
OD (metal Ring)
+0.13 -0.01
ThicknessMinimum Burst Pressure bar
1/8 020 820 10.37 11.84 15.88 2 1480
1/4 021 821 13.74 15.21 20.57 2 1540
3/8 023 823 17.28 18.75 23.80 2 1230
1/2 025 825 21.54 23.01 28.58 2.34 1120
5/8 026 826 23.49 24.97 31.75 2.34 1240
3/4 027 827 27.05 28.53 34.93 2.34 1050
7/8 029 829 38.10 32.29 38.10 2.34 860
1 030 830 33.89 36.88 42.80 3.25 780
1.1/4 032 832 42.93 45.93 52.38 3.25 690
1.1/2 033 833 48.44 51.39 58.60 3.25 690
1.3/4 034 834 54.89 58.30 69.85 3.25 950
2 036 836 73.03 63.63 73.03 3.25 720
2.1/4 038 838 66.68 69.98 79.50 3.25 670
2.1/2 039 839 76.08 79.38 90.17 3.25 680