Radial Seal MR19
DESCRIPTION
Radial Seal MR19 is double-acting rod seal and are used in hydraulic rotary transmission systems.
It seals the pressure lines from each other and are suitable for high hydraulic pressures in the case of pivoting motions.
It consists of a rubber part with fabric reinforcement on the sliding surface, which thanks to two edges forms an oil groove and two plastic anti-extrusion rings.High and secure static sealing, also high and low temperature resistance in case of suitable compound selection. For small sizes under 50 mm or big sizes up to 750 mm contact us for availability or code indentification.
APPLICATION
Exscavators
Grippers
Swivel joints
Hose reels
| Standard material | ||||
|---|---|---|---|---|
| Material Set Code | N4271 | |||
| Material base | NBR Rubber | |||
| Fabric | Cotton | |||
| Back ring | Polyamide based | |||
For low temperature applications, or excellent medium-rubber compatibililty in special applications a few materials are recommended and available on request
| Pressure, Speed | |
|---|---|
| Working pressure, P | Max 20 Mpa |
| Running speed v, | Up to 0.2 m/s |
| Medium, Working Temperature | |
|---|---|
| Material Code | N4271 |
| Hydraulic oils: HL, HLP | -30 … +80 °C |
| HFA, HBA fluids | +5 … +60 oC |
| HFC fluids | -30 … +60 °C |
| Water | +5 … +80 oC |
| Mineral greases | -30 … +80 °C |
| Tolerances | ||
|---|---|---|
| Ød | emax | ØD |
| 10 … 750 mm | H8/f8 | H9 |
Read More
*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0% INSTALLATION
Surface finish*
Surface roughness
Ra
Rmax
Sliding surfaces
0.05 .. 0,3μm
≤ 2.5 μm
Groove base
≤ 1.6 μm
≤ 6.3 μm
Groove flanks
≤ 3 μm
≤ 15 μm
Surface hardness must be 45 – 60 HRC with 0.5mm layer in depth For diameters < 50 mm open grooves are required
During installation the sealing part must be first installed, followed by the back-up rings