Synertech Stock
Product codes
Details
TTI series rod seals are asymmetric-lip dynamic seals made of Tecnolan polyurethane, designed for hydraulic applications under standard and heavy-duty operating conditions. The inner lip, shorter and more robust, provides dynamic sealing on the rod, while the outer lip ensures static retention of the seal inside the cylinder housing.
TTI and TTI/L
TTI Standard
Asymmetric-lip profile made of compact polyurethane with high elastic memory, developed to combine static sealing on the outer housing with dynamic sealing on the rod.
TTI/L
Evolution of the TTI profile featuring a second stabilizing and internal scraper lip positioned on the dynamic side. The geometry is designed to improve sliding performance and radial stability of the rod.
Materials and operating conditions
| Material | Compound | Linear speed | Temperature | Max pressure |
|---|---|---|---|---|
| Standard PU | Tecnolan 93 ShA | Up to 0.5 m/s | −40 / +110 °C |
Up to 40.0 MPa 400 bar |
| Special PU | Tecnolan 95 ShA | Up to 0.5 m/s | −35 / +120 °C |
Up to 50.0 MPa 500 bar |
Mineral-based hydraulic oils, standard lubricants, synthetic greases and environmentally friendly biodegradable hydraulic fluids.
Main features
Asymmetric geometry
The lip geometry distributes radial loads between the dynamic rod surface and the static housing, helping to reduce friction under no-load conditions and increase the sealing effect as circuit pressure rises.
Tecnolan elastic memory
The polyurethane compound maintains the radial preload required for proper lip contact throughout operating cycles, contributing to stable performance over time.
Extrusion resistance
The polyurethane formulation and profile geometry counteract seal deformation into the mechanical clearance during pressure peaks.
Second dynamic lip
The additional lip of the TTI/L version contributes to rod stabilization under misaligned loads and retains a thin lubricant film on the sliding surface. This configuration reduces static friction and provides an additional barrier against micro-leakage.
Advantages of the TTI / TTI-L profile
Static and dynamic sealing
The different geometry of the two lips allows the housing retention function to be separated from the dynamic sealing function on the rod.
High pressures
The available Tecnolan compounds allow applications up to 400 bar in the standard configuration and up to 500 bar with Special PU 95 ShA.
TTI/L sliding performance
The second lip of the TTI/L variant promotes rod micro-lubrication and helps reduce stick-slip and wear during reciprocating motion.
Typical applications
- Industrial hydraulic cylinders, machine-tool cylinders and industrial automation
- Earth-moving machinery, excavators, front loaders and wheel loaders
- Agricultural machinery, tractor lifting cylinders, combine harvesters and forestry equipment
- Forklifts, hydraulic tail lifts, aerial platforms and logistics handling equipment
- Light and medium hydraulic presses, clamping cylinders and linear hydraulic actuators
Market equivalents
| Manufacturer | TTI Standard | TTI/L - Second lip |
|---|---|---|
| Net Seals | TTI | TTI/L |
| Guarnitec | TTI | TTI/L |
| Freudenberg (Simrit) | Merkel® T20 | Merkel® T24 / T22 |
| Parker Prädifa | Profile B3 / BD | Profile BS |