Rotary shaft seal types
TCV oil seal: pressure-resistant stiffened lip
A TCV seal stiffens the lip rather than backing it up, so it holds a moderate pressure that would push a standard lip onto the shaft. Conquest Seal supplies radial shaft seals, also sold as rotary shaft seals, rotary lip seals and oil seals, in inch and metric sizes. Send the part number or drawing and we quote it.
- Family
- Radial lip seals
- Designation
- TCV
- Lips
- 2
- Dust lip
- Yes
- Garter spring
- Yes
- Outside diameter
- Rubber-covered
- Case
- single metal insert
- Pressure
- 3 bar (43.5 psi), as a momentary surge peak, NOK®
Radial lip seals
A flexible lip pressed against a rotating shaft by a garter spring, held in the housing by a case. This is what most people mean by an oil seal, and it retains lubricant at low pressure rather than holding pressure.
When to use it
Rotating shafts at moderate pressure, on relatively small diameters. A standard lip seal will not hold the pressure but the duty does not warrant a supported design. The lip is made more rigid rather than backed up.
When another type fits better
- TCN: Pressure-resistant lip with an auxiliary cage, when the pressure is higher than a stiffened lip can hold.
Sources: NOK Oil Seals catalogue 014E, read 2026-09-16.
NOK is a trademark of NOK Corporation. The maker designations on this page are the makers' own. No affiliation or endorsement is implied.
Related pages
Orders are handled under Conquest Seal's AS9100D quality management system, whose certificate scope includes distribution.
Send the shaft, bore and width, or the old seal's markings
The three dimensions or the code printed on the old seal, the speed, any pressure, the fluid and the quantity. A Conquest representative replies with the quote.
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