HL Rod Seal
Descriptions
The HL Ultrathan® rod seal is a friction-optimised sealing solution for mobile and stationary hydraulic applications, featuring a new type of functional principle: the singleacting rod seal has pressure-activated, cascading dynamic sealing edges.
This design clearly reduces static and dynamic friction in hydraulic cylinders and increases the efficiency of hydraulic systems.
Features
• Minimal break-away and dynamic friction and no stick-slip tendency ensures
uniform motion even at low speeds.
• No stick-slip tendency in case of low
sliding speeds.
• Low break-away and dynamic friction,
even after prolonged standstill under
high pressure.
• Constantly low dynamic friction
throughout the part‘s service life.
• Insensitive to pressure peaks.
• Improved lubrication due to pressure
medium deposit in the dynamic contact
area.
• High extrusion resistance.
• Excellent media resistance in case of
suitable compound selection.
• Suitable compounds available for
special requirements of the chemical
process industry.
• Suitable compounds available for special requirements of the food processing
industry.
• Dimensions according to ISO 5597.
• Short axial assembly length.
• Installation in closed and undercut
housings.
• Additional sizes of machined products
available on short notice.
Range of application
Mainly for applications with increased requirements regarding friction and sliding behaviour in mobile and stationary hydraulics. The dimensions mainly conform to the
requirements of ISO 5597 for housing and diameters respectively.
| Operating pressure | ≤ 250 bar |
| Operating temperature | -35 °C to +110 °C |
| Sliding speed | ≤ 1 m/s |
| Media | Hydraulic oils based on mineral oil and PAO fluids |
Compounds
The Ultrathan® P6030 compound is a Parker material based on polyurethane with a
hardness of approx. 93 Shore A. Its main advantages in comparison with other polyurethane materials currently available on the market are its excellent wear resistance,
low compression set and improved temperature resistance.
Installation
The seals should have an axial clearance (see columns H and L). To avoid damage at
the sealing lips, the seals should not be pulled over sharp edges during installation.
Normally these seals may be snapped into closed grooves. Where access is restricted
special assembly tools may be required. Proposals for the design of such tools will be
provided on request. For gap sizes see chapter „Maximum Gap Allowance“.
| d | D | H | L |
| 20 | 28 | 4.5 | 5 |
| 22 | 30 | 4.5 | 5 |
| 25 | 33 | 4.5 | 5 |
| 30 | 40 | 5.7 | 6.3 |
| 32 | 42 | 5.7 | 6.3 |
| 35 | 45 | 5.7 | 6.3 |
| 36 | 46 | 5.7 | 6.3 |
| 37 | 47 | 5.7 | 6.3 |
| 40 | 50 | 5.7 | 6.3 |
| 45 | 55 | 5.7 | 6.3 |
| 50 | 60 | 5.7 | 6.3 |
| 56 | 66 | 6.5 | 7 |
| 63 | 72.6 | 5.5 | 6.3 |
| 65 | 75 | 7 | 7.5 |