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A screw-connection pipe fitting with an elastomer seal forms the subject of this patent. The main feature of the design is that a series of grooves and fluid passages are used to ensure that the seal is pressurised by the fluid pressure in the pipe. This includes a groove in the threaded section of the fitting and various designs of groove or 'castellation' around the seal groove. The pressure is fed to the back side of the seal to ensure that it is energised against the fitting flange face. A number of seal design options including O-ring, Quad Ring and other shapes are illustrated.
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This gasket arrangement is designed for use as a replacement inlet manifold gasket on used vehicles. It is specifically intended for use with corroded or pitted flanges. A shim ( 36) is used to cover the damaged surface. An adhesive layer ( 14) is used to seal the shim to the damaged surface.
piston for operating a valve seat arrangement. This switches the compressed air flow between several external connectors. The control piston may be pressurized for axial positioning by means of at least one electromagnetic pilot valve housed in a pilot valve housing. The pilot valve housing is detac