The unique G-T^® Ring provides a compact double-acting seal for use in new designs for light or heavy duty applications where a more bulky type of seal had previously been required.

This proven seal combines a tough, resilient, T-shaped sealing element with precisely dimensioned, pressure-activated non-extrusion rings (Figure 1) in applications where pressures may range to 10,000 psi (690 bar) or higher.

The seal eliminates several major sealing problems:

• Sealing element is protected from extrusion where clearances are large or pressures are high,
• Prevents spiral failure common to O-Rings, and
• As non-extrusion rings are radially activated, they may be fabricated of materials with high shear strengths that will successfully bridge large clearance gaps encountered during high pressure cylinder breathing or incidental to use of wear rings. For more than 40 years, the G-T Ring has been used by the Ordnance Department in recoil systems and by Industrial designers to solve their most severe sealing problems encountered in a wide variety of industrial, mobile and oil field requirements.

Utilize related ISO recommendations where appropriate as follows:

• ISO/R286, tolerances (where suitable),
• ISO 468, surface roughness, and
• ISO 3286, Single Point Cutting tools-corner radii.

The sequential range of rod and bore diameters for each cross section are recommended for G-T seal type usage in dynamic applications only. Extension of range of diameters in each cross section group is possible but should be discussed with Greene, Tweed. For example, use of 1.80 mm cross section seal in a 20 mm dynamic piston application would not be recommended in favor of a 2.62 mm Cx seal.