All ten Lycotek PTFE piston seal series are engineered around five core characteristics — from low-friction, stick-slip-free motion to extrusion-resistant, standardized-groove designs:

 

1. Low-friction, stick-slip-free operation

All Lycotek piston seal series deliver low friction and stick-slip-free motion for smooth, efficient, precisely controlled cylinder operation.

 

2. High wear resistance, long service life

Abrasion-resistant sealing faces and high dimensional stability extend service life and reduce maintenance.

 

3. Extrusion resistance for high-pressure duty

Robust seal geometry and optional integrated back-up rings permit larger hardware clearances and safe high-pressure operation.

 

4. Broad media compatibility

PTFE-based sealing faces are compatible with a broad range of hydraulic fluids, chemicals and gases — mineral oil-based and flame-retardant hydraulic fluids, environmentally friendly bio-based fluids, phosphate ester, water, water-glycol and emulsions, air and gases — with chemical resistance further tailorable through energizer material selection, and media-separating capability (fluid/fluid, fluid/gas) available where duty demands it.

 

Product Range

The ten Lycotek PTFE piston seal series below span the principal piston-sealing duty classes — from compact, light-duty delta profiles to spring-energized seals for extreme temperatures and back-up-ring versions rated to 100 MPa, in both reciprocating and rotary motion. The table summarises each series at a glance: construction, key technical data, and its most common applications.

 

Type	Product Overview	Technical Data				Typical Applications
		Temp	Speed	Pressure	Size Ø
DET	DET Double-Acting Piston Seal, universal type PTFE seal ring + O-ring energizer	−45 °C to +200 °C (depending on O-ring material)	up to 15 m/s	up to 60 MPa	up to 2,700 mm	• Injection molding machines • Machine tools • Presses • Excavators • Forklifts & handling machinery (Particularly recommended for heavy duty and large diameter applications.)
DAS	DAS Double-Acting Piston Seal, step-cut profile for heavy duty PTFE sliding ring with step-cut joint + O-ring energizer	−45 °C to +200 °C	up to 15 m/s, with reciprocating movements, frequency up to 5 Hz	up to 60 MPa	up to 2,700 mm	• Mobile hydraulics • Construction equipment • Injection molding machines • Machine tools • Presses
DEC	DEC Double-Acting Piston Seal, compact delta profile for light duty Symmetrical delta-shaped PTFE seal ring + O-ring	−45 °C to +200 °C (according to O-ring material)	up to 15 m/s	up to 35 MPa	5 – 999.9 mm	• Machine tools • Handling devices • Valves • Chemical process equipment (Particularly recommended for light duty and small diameter applications.)
DQA	DQA Double-Acting Piston Seal with X-ring energizers PTFE seal ring + X-ring + O-ring	−45 °C to +200 °C (depending on O-ring and X-ring material)	up to 2 m/s with reciprocating movements	up to 50 MPa with mineral oil; up to 30 MPa for media with reduced lubricating properties	15 – 462.9 mm (PQ52 463–700 mm not included)	• Mobile hydraulics • Machine tools • Presses • Hydro-pneumatic suspensions for heavy vehicles • Pressure intensifiers
DQB	DQB Double-Acting Piston Seal with X-ring energizers, low-friction version PTFE seal ring + X-ring + O-ring	−30 °C to +200 °C	up to 3 m/s with linear movements, frequency up to 3 Hz	up to 60 MPa with mineral oil; up to 25 MPa for media with low lubricating properties	25 – 700 mm	• Mobile hydraulics • Cranes • Heavy duty suspension cylinders • Machine tools • Presses
DWT	DWT Heavy-Duty Piston Seal for high pressure Modified PTFE seal ring + NBR energizer + back-up ring	−45 °C to +135 °C	1.5 m/s	50 MPa (peak pressure up to 60 MPa)	50 – 320 mm	• Excavators • Tunnel boring machines Cranes / lifting machinery • Heavy-duty hydraulic cylinders
DEBB	DEBB Double-Acting Piston Seal with back-up rings for ultra-high pressure PTFE seal ring + O-ring + back-up rings	−45 °C to +200 °C	up to 5 m/s	up to 100 MPa	20 – 2,700 mm	for dynamic applications with higher pressures or larger gaps.
SVP	SVP Spring-Energized Piston Seal for extreme temperatures & low friction PTFE U-cup + corrosion-resistant metal spring	−70 °C to +300 °C	reciprocating up to 15 m/s; rotating up to 1.3 m/s	Max. dynamic 20 MPa; max. static 40 MPa (200 MPa with back-up ring)	2 – 3,300 mm	• Hydraulic components (cylinders, valves, pumps, etc.) • Chemical processing equipment • Pharmaceutical processing • Food & beverage processing • Spindle seals for machine tools
RGP	RGP Rotary / Oscillating Seal PTFE seal ring + O-ring	−45 °C to +200 °C (depending on O-ring material)	Up to 2 m/s	Up to 30 MPa	up to 2,700 mm	• Rotary distributors • High pressure valve stems • Manipulators • Pivoting motors in mobile hydraulic and machine tools • Hydraulic motors
DEW	DEW Double-Acting Piston Seal, polyurethane for wear & impact resistance Polyurethane seal ring + NBR O-ring	−35 °C to +110 °C	up to 0.5 m/s	up to 25 MPa	Groove identical to Glyd Ring type	• Machine tools • Forklifts and handling machinery • Agriculture • Industrial hydraulic light to medium duty

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.