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V-rings

A V-ring, also known as a V-ring seal or axial shaft seal, is an elastomer seal that rotates with the shaft and seals axially against a counterface. The V-ring prevents dirt, dust, water, or oil from entering the system and protects bearings and seals from contamination. The counterface can be formed by the housing itself, a cover, a plate, or, for example, the outer ring of a bearing. Due to their simple installation and reliable performance, V-rings are widely used in hydraulic and mechanical systems.

Materials

NBR, EPDM, Viton (FKM / FPM), Neoprene (CR), Polyurethane (PU)

Applications

Pumps, engines, electric motors, shafts, hydraulic and pneumatic systems.

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V-Rings (V-Seals)

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V-ring Types: VA, A, VS, S, VL, L — NBR · Viton (FKM/FPM) · EPDM · Neoprene (CR) · PU

Function

A V-ring (V-seal) is a shaft-mounted, elastomer rotary dust seal that protects bearings. It clamps to the shaft while the sealing lip runs against a counterface (housing/cover).

At standstill, the lip presses against the counterface. As speed increases, centrifugal force reduces contact pressure. Above ~15–20 m/s the lip can lift off, so the V-ring transitions to a gap/labyrinth action while its flinger effect repels contaminants. Friction losses rise roughly linearly up to ~10 m/s, then decrease; by ~15–20 m/s they approach near-zero.

Types

VA, A, VS, S, VL, L

Materials

NBR · EPDM · Viton® (FKM/FPM) · Neoprene (CR) · Polyurethane (PU)

Applications

Pumps, (electro) motors, shafts/bearings and general rotating equipment.


Trelleborg Sealing Solutions (formerly Busak & Shamban): Types A, S, L, LX, RM, RME, AX, Gamma Seal.

Brands

ACLA, Stefa Forsheda, Gapi, Macma, Parker, Hallite, Trelleborg (Busak & Shamban), Merkel Freudenberg, ERIKS, Polypac, NAK, NOK, Kaco, Ebele, Gaco, Hunger, Evco, Nordex, Dichtomatik, Hecker, James Walker.

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