Hydraulic & Pneumatic Seal Identification

Combine three pieces of information: (1) where the part sat in the cylinder (wiper, rod seal, buffer seal, piston seal, guide band, or static seal), (2) its three reference dimensions (inner diameter ID, outer diameter OD, and axial height H), and (3) its cross-section profile (such as a U-cup, O-ring energised U-cup, PTFE glide ring, 5-part compact piston seal, guide ring, or wiper). Olypsys automates this on a calibration grid using a 3-angle photo capture, 3D section fitting, and a 30,184-part catalogue.

Unlike a flat washer, cylinder seals such as U-cups, wipers, piston assemblies, and guide bands stand 4 mm to 20 mm tall. In a single overhead photo, elevated top edges shift outward by h·tan(θ), introducing millimetres of perspective error, and axial height cannot be separated from diameter. By capturing an overhead frame plus two oblique angles (~22° and ~45°), Olypsys fits candidate 2D sections in 3D (r, z) space and solves for ID, OD, and height together.

No. Before taking a photo, you can tap where the part came from on an interactive hydraulic or pneumatic cylinder cutaway, or tap "I don’t know". After capture, Olypsys ranks colour-coded cross-section drawings by material (polyurethane, NBR rubber, fabric composite, PTFE, POM, steel case, garter spring) and labels them as Best fit, Close alternative, or Possible.

Olypsys fits every candidate profile class in both resting orientations during the measurement pass. On the results screen, tapping "Other way up" on any asymmetric profile card flips the section drawing and swaps in that orientation’s height-corrected ID, OD, height, and 3D model without re-uploading.

A used seal pulled from a cylinder rarely measures at its exact catalogue dimension: polyurethane and rubber swell in oil, stretch during removal, or wear down in service. Rather than requiring an exact to-the-tenth-of-a-millimetre hit, Olypsys checks your measured ID, OD, and height against both metric (mm) and imperial (inch) standard tables simultaneously using realistic service-wear tolerances. It shows the closest standard matches in both systems side by side, and flags when a metric and inch size sit close enough together (for example, 40.0 mm vs 1-9/16" / 39.69 mm) that you should confirm the metal rod or bore with calipers.

The catalogue spans 24 generic profile classes and 30,184 published identities across both lipped and non-lipped cylinder parts: rod seals (symmetric, loaded, X-energised, twin-lip, fabric-backed, PTFE glide rings, vee packings), piston seals (5-part compact sets, PTFE glide rings, T-seals, piston cups, cast-iron rings), wipers (snap-in, AN, D/DT, double-lip, metal-cased), buffer seals, guide/wear bands, backup rings, cushion seals, and rotary shaft seals (TC oil seals and V-rings).