Why engineers specify PTFE spring energized seals for demanding duties:

1. Very Low Friction, Stick-Slip Free

PTFE spring energized seals run with a very low coefficient of friction and stick-slip free operation, and offer good dry-running properties where full lubrication cannot be guaranteed — enabling precise, smooth motion control at sliding speeds up to 15 m/s.

 

2. Virtually Universal Chemical Compatibility

The PTFE jacket is resistant to virtually all fluids, chemicals and gases, and its properties are unaffected by contact with chemicals — one seal family covers the aggressive media, solvents and gases where elastomer seals degrade.

 

3. Extreme Temperature Capability

Across the range, operating temperatures span −120 °C up to +260 °C. The seals withstand rapid changes in temperature and offer very good thermal resistance, from cryogenic service to high-temperature duties.

 

4. Long Service Life in Demanding Media

High abrasion resistance, dimensional stability and excellent resistance to ageing combine with optimized lip profiles for long service life — even in media of high viscosity or containing particle ingress.

 

Product Range

Lycotek offers five standard PTFE spring energized profiles — SV, SVC, SC, SD and SF — each pairing a U-shaped PTFE jacket with a different metal spring geometry to suit a distinct duty. The table below gives a side-by-side overview.

Type	Product Overview	Technical Data				Typical Applications
		Temp	Speed	Pressure	Size Ø
SV	PTFE U-jacket + V-spring single-acting seal with optimized front-angle lip; the universal hydraulic and pneumatic choice.	-70 °C up to +260 °C	up to 15 m/s reciprocating up to 1 m/s rotating	45 MPa dynamic 60 MPa static	3 – 2,600 mm	· Mobile hydraulics · Pneumatics, cylinders & valves · Pumps & chemical processing · Spindle seals (machine tools) · Food & pharmaceutical processing
SVC	PTFE U-jacket + V-spring seal with heavy dynamic lip for high-viscosity media and particle-laden service.	-70 °C up to +260 °C	up to 10 m/s reciprocating up to 0.5 m/s rotating	45 MPa dynamic 60 MPa static	3 – 2,600 mm	· Highly viscous media · Food & bottling plants · Pharmaceutical processing · Adhesives, pastes & sealants · Media with particle ingress
SC	PTFE U-jacket + slanted-coil spring seal with near-constant load for low-pressure instruments and precision control.	-70 °C up to +230 °C	up to 15 m/s reciprocating up to 1 m/s rotating	20 MPa dynamic 60 MPa static	3 – 2,600 mm	· Servo & proportional valves · Pressure switches · Measuring instruments · Laboratory apparatus · Electronic equipment
SD	PTFE U-jacket + helical spring seal with high contact load for static, vacuum and cryogenic service.	-120 °C up to +260 °C	up to 5 m/s reciprocating up to 0.1 m/s rotating	20 MPa dynamic 80 MPa static	3 – 2,600 mm	· Compressors & ball valves · Vacuum service · Cryogenic engineering · Oil & gas installations · Nuclear & aerospace
SF	PTFE U-jacket + V-spring seal with anti-rotation flange; the dedicated rotary-shaft profile.	-100 °C up to +260 °C	up to 10 m/s reciprocating up to 2 m/s rotating	15 MPa dynamic 25 MPa static	3 – 2,600 mm	· Rotary hydraulic shafts · Injection moulding machines · Gearbox shafts · Rotating & pivoting arms · Plastic processing equipment

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.