Standard elastomer radial shaft seals are limited in temperature, surface speed, media compatibility and pressure — and are poorly suited to applications with inadequate lubrication. Lycotek’s Lipseal range replaces the elastomer lip with a filled-PTFE sealing element to overcome these boundaries, delivering five key features for demanding rotary applications.

1. Low-friction, stick-slip-free running for high-speed rotary sealing

The filled-PTFE sealing lip provides inherently low friction and stick-slip-free running, minimising heat generation and permitting higher peripheral speeds. In torque testing on a 40 mm shaft, running torque stays low and stable, resulting in very low power consumption.

 

2. Wide temperature range from -100 °C to +260 °C

Filled-PTFE lip materials are rated from -100 °C to +260 °C. Unlike PTFE lip seals whose temperature performance is limited by an elastomer gasket, the mechanically retained lip gives the sealing system an excellent temperature envelope — suitable for both cryogenic and high-heat rotating equipment.

 

3. Chemical, oil-additive and biofuel resistance

PTFE’s strong carbon-fluorine bonds make the seal resistant to mineral acids, bases, common organic fluids and solvents, and unaffected by oxidation, ultraviolet radiation or ozone — ideal for the chemical industry and applications exposed to the atmosphere. The lip also withstands oil additives and biofuels that degrade many elastomers, allowing longer oil service life.

 

4. Two-part, spring-free construction with inherent material memory

Each seal is built from just two parts — a precision metal body and a mechanically retained PTFE sealing element — so no gasket is required between lip and casing, improving both chemical resistance and temperature range. PTFE’s inherent material memory supplies the radial load of the lip onto the shaft, eliminating the energizer spring found in conventional designs and keeping the seal envelope compact.

 

5. Dry-running and lubrication-starvation capability

The Lipseal range can run without lubrication for extended periods compared with elastomer shaft seals, without adversely affecting service life — covering start-up and other intermittently lubricated operating conditions, and functioning as an effective dirt, dust and powder seal where contamination must be excluded.

 

Product Range

Type	Product Overview	Technical Data				Typical Applications
		Temp	Speed	Pressure	Size Ø
LMA Single lip	· Single lip · Standard industrial use · For poor lubrication / demanding media · Up to 90 m/s (with cooling)	-100 to +260 °C (-148 to +500 °F)	Up to 100 m/s (19,680 ft/min)	Up to 0.5 MPa (73 psi)	6–170 mm (metric)	· Standard industrial applications · Where elastomer radial shaft seals are limited by temperature, friction, medium or poor lubrication
LMB Back-up lip	· Single lip + back-up lip · High seal integrity · Contaminated media	-100 to +260 °C (-148 to +500 °F)	Up to 100 m/s (19,680 ft/min)	Up to 0.5 MPa (73 psi)	6–170 mm (metric)	· Applications requiring high seal integrity · Contaminated media sealing with secondary (back-up) sealing lip
LMH Reinforced (1 MPa)	· Reinforced sealing lip · Higher-pressure duty · Pump / shaft / rotor seals	-100 to +260 °C (-148 to +500 °F)	Up to 100 m/s (19,680 ft/min)	Up to 1 MPa (145 psi)	6–170 mm (metric)	· Higher-pressure applications beyond elastomer capability · Pump, shaft or rotor seals
LMC Double-sided	· Pressure from both sides · Two-medium separation · 2nd lip = wiper / dust lip	-100 to +260 °C (-148 to +500 °F)	Up to 100 m/s (19,680 ft/min)	Up to 0.5 MPa (73 psi differential)	6–170 mm (metric)	· Bi-directional / double-sided pressure applications · Two-medium separation using a single seal · Combined sealing lip + wiper / dust lip function
LMG Non-contact dust lip	· Double lip, non-contact env. seal · Dust / dirt ingress protection · Low torque & power draw	-100 to +260 °C (-148 to +500 °F)	Up to 100 m/s (19,680 ft/min)	Up to 0.5 MPa (73 psi)	6–170 mm (metric)	· Dust and dirt ingress sealing · Low-torque, low-power-consumption applications · Same bidirectional capability as the LMC layout

Notes:

The data above represent maximum values and are not to be used simultaneously. For example, the maximum pressure depends on the material type, temperature, and clearance, while the temperature range is also dependent on the medium type.