Why PTFE wiper seals? Conventional polyurethane wipers are limited by material friction and temperature: typical PU grades are rated to only 5 m/s (2 m/s for some compounds) and +80 °C to +110 °C, and elastomer lips can vulcanise — bond — to the rod surface over time. Lycotek PTFE wiper seals pair a low-friction PTFE scraper ring with an elastomer O-ring energizer that maintains tight lip contact, combining smooth, stick-slip-free operation with dependable scraping in rough, hot or cold environments.

 

1. Stick-Slip-Free, Low-Friction Wiper Operation

The PTFE scraper ring offers outstanding sliding properties with no stick-slip and no sticking, and it does not vulcanise to the counter-surface of the piston rod. This keeps the wiper responsive at high rod speeds — linear speeds of up to 15 m/s with PTFE materials — and helps avoid the jerky rod motion that accelerates wear of the entire rod sealing system.

 

2. Tough Scraping of Firmly Adhered Contamination

A robust scraper profile achieves a very good scraping effect even against firmly adhered dirt, dust, solid particles and ice, and offers excellent wear resistance. The design also compensates for deflection of the piston rod or plunger, keeping the lip in reliable contact under mechanical stress — ideal for earthmoving machinery, presses and other heavily contaminated heavy-duty applications.

 

3. Double-Acting Oil Film Control

Double-acting wipers scrape contamination from the outside while providing a very good sealing effect from the inside against the residual oil film adhering to the rod surface. The AEG series takes this further with two geometrically different scraper lips positioned back-to-back, each energized by its own O-ring, for medium to heavy-duty applications where a gap between the rod and the gland in front of the wiper is not wanted.

 

4. Wide Temperature and Media Compatibility

High and low temperature capability from -45 °C to +200 °C with PTFE materials (depending on O-ring material) covers sub-zero outdoor service as well as hot-running equipment. The scraper materials offer very high resistance to hydraulic media — mineral oil-based hydraulic fluids, flame-retardant fluids, bio-oils, phosphate ester, water and air — depending on scraper ring and O-ring material compatibility.

 

 

Product Range

The Lycotek PTFE wiper seals range combines PTFE scraper rings with elastomer O-ring energizers to cover both single-acting and double-acting rod scraping requirements. From compact single-lip designs for small-diameter rods to heavy-duty twin-lip scrapers for large hydraulic systems, the four product families below share low-friction, stick-slip-free operation while differing in groove geometry, energizer count and diameter coverage.

 

 

Type	Product Overview	Technical Data			Typical Applications
		Temp	Speed	Size Ø
AE	Double-acting heavy-duty scraper. Scraper lip and sealing lip positioned back-to-back; single O-ring energizer. Tough scraping against adhered dirt, stick-slip-free operation, compensates rod deflection.	-45 °C to +200 °C (PTFE) -45 °C to +110 °C / -60 °C to +80 °C (PU) depending on O-ring material	up to 15 m/s (PTFE) up to 2 m/s (PU)	up to 2,600 mm (PTFE) up to 2,200 mm (PU) ISO 6195 Type D from Ø40 mm	· Construction machinery · Presses · Rod seals with hydrodynamic back-pumping
AS	Classic single-acting scraper. Compact robust design, simple groove, low friction, no stick-slip. Wide temperature and media range; covers rods from 6 mm to 999 mm.	-45 °C to +200 °C (PTFE) -45 °C to +110 °C / -60 °C to +80 °C (PU) depending on O-ring material	Max. 15 m/s (PTFE) Max. 5 m/s / Max. 2 m/s (PU)	6 mm to 999 mm ISO 6195 Type D up to Ø63 mm	· Rod sealing systems with linear movements · Rough, delicate, hot or cold environments · Dust, dirt, solid particles, ice removal
AEF	Double-acting scraper with two O-rings. Scraper lip and sealing lip back-to-back; improved radial flexibility and sealing function, easy installation in closed grooves.	-45 °C to +200 °C (PTFE) -60 °C to +80 °C / -45 °C to +110 °C (PU) depending on O-ring materials	15 m/s (PTFE) 2 m/s / 1 m/s (PU)	19 mm to 1,500 mm ISO 6195 Type D on recommended diameters from 40 to 140 mm	· Construction machinery · Truck cranes · Agriculture machines · Hydraulic presses · Injection molding machines
AEG	Double-acting scraper for medium to heavy-duty. Two different scraper lips positioned back-to-back, two O-ring energizers. Designed where no gland gap in front of the wiper is permitted.	-45 to +200 °C	up to 5 m/s	100 - 999 mm	· Medium to heavy-duty applications with no gland gap in front of the wiper