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Seal Configurations

To determine the appropriate profile for an inflatable seal, it’s environment and geometry must be considered. To define the geometry of a seal you must consider what mechanical action you intend the seal to make within its application. The illustrations below show common seal geometries and their most suitable profile types. Profile drawings and related technical information are available in our Inflatable Seals Catalogue.

Radial In

This configuration of seal is well suited to clamping applications as well as shaft maintenance seals and valve seals. Profile types with large inflating distances relative to their size such as Frog-Leg profiles are generally not well suited for this configuration.

Suitable Profile Types:

  • Castellated

  • Stem/Foot Location

 

 

 

Radial Out

In this configuration, the seal inflates outwards away from its centre. Seals can be clamped in place, fitted into a machined groove or stretch fitted. Common applications of this configuration include: airlock door seals and drum/bag filler seals.

Suitable Profile Types:

  • Castellated

  • Frog-Leg

  • Footed Snap

  • Stem/Foot Location

  • Channel Fit

Axial

Axially configured inflatable seals inflate in the direction perpendicular to the radius of the seal. This configuration is often used for door and hatch seals.

Suitable Profile Types:

  • Castellated

  • Frog-Leg

  • Footed Snap

  • Stem/Foot Location

  • Channel Fit

Straight Length

By blocking the ends inflatable seals can be manufactured in straight lengths. These seals are often used in production lines as clamps and actuators or in civil engineering applications to provide watertight seals under large sliding doors.

Suitable Profile Types:

  • Castellated

  • Stem/Foot Location

 

Rectangle with Moulded Corners

Using Pre-moulded corners to allow bending around tight radii, inflatable seals may be manufactured in rectangles. These seals are commonly used on sliding doors and mixer lids.

Suitable Profile Types:

  • Frog-Leg

  • Channel-Fit

  • Footed-Snap

Goal-Post Shaped

Goal-Post Shaped configurations combine straight length inflatable seals with moulded corners to create a U-shaped seal that expands axially. These seals are used in similar applications to rectangular seals.

Suitable Profile Types:

  • Frog-Leg

  • Channel-Fit

  • Footed-Snap