D-Ring Seal

Description

High-performance polyurethane solution extends seal life with one-piece design For hydraulic valves

The unique shape of the D-Ring provides a variety of design advantages. The molded “D” shape which is higher in the middle and lower on the ends, provides sealing in critical areas while reducing the chance of a seal being cut during installation. It’s sealing lip is minimized thus reducing the amount of friction between seal and bore while providing expected sealing performance. The “D” shape is symmetrical so there is no performance degradation as the valve cycles in the reverse direction or concern of backward installation of the seal. The design also incorporates “pressure pedestals” to eliminate the potential
for “blow-by,” common in reverse cycling.