Machine Design

Trapezoidal-Shaped O-Ring

The Trap-Seal is a trapezoidal-shaped O-ring that is designed to stay securely lodged under the groove lip of the O-ring face seal (ORFS) fitting.

The trapezoidal shape is said to eliminate the possibility of the O-ring popping out, unlike standard round-shape O-rings that rely on being pinched by the groove retaining ring for seal retention. The O-ring's design provides consistently positive retention in the groove and creates a larger overlap between the groove lip and trapezoidal seal for increased retention. Other advantages of the Trap-Seal include reduced risk of seal damage and leakage, smoother preassembly process, interchangeability with O-rings in standard SAE J1453 half-dovetail groove, and same material and hardness as the company's standard 90 Durometer nitrile O-ring.

Parker Hannifin Corp., Tube Fittings Div., 3885 Gateway Blvd., Columbus, OH 43228, (614) 279-7070,

TAGS: Technologies
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