Pneumatic Seal A2
The function of the pneumatic wiper ring A2 is to prevent dust, dirt, grains of sand and metal shavings from entering the dynamic rod guide. This is achieved by a special design which largely prevents the development of dents, protecting the guiding parts,and extending the working life of the seals.
This wiper is specially developed for pneumatic equipment operated with dry air and oil-free air. This wiper must be pregreased prior to installation.Oversized diameters ensure a tight fit in the groove recess, thus preventing the penetration of foreign particles and dampness.
The profile A2 pneumatic wiper ring provides a technically proper closure at the cylinder requiring no screwings brackets, close tolerances, and no metal inserts. There will be no corrosion as in the case with metalcased wipers. For the groove recess fine fitting is not required.
• Good wear resistance.
• Smooth running due to optimum lubricant-retaining sealing lip geometry.
• High temperature resistance in case of suitable compound selection.
• Excellent media resistance in case of suitable compound selection.
• Product geometry prevents dirt deposits at the front face of the cylinder.
• Installation in closed and undercut housings.
| Range of application | |
| Suitable for axially operated rods in pneumatic cylinders, plungers and rod guides. | |
| Operating temperature | |
| A2 NBR N3587 | -30 °C to +80 °C |
| A2 PUR P5008 | -35 °C to +80 °C |
| Sliding speed | ≤ 2 m/s |
| Media | Compressed air, both lubricated and oil free (after greasing for fitting) |
Installation
A2 wiper rings are supplied as continous rings. Any pressure on the back of the rings should be avoided.Intermediate sizes may easily be manufactured from the next largest ring with the same cross-section. For this, the ring should be cut at an angle of 90° to the circumfence length (+2 to 3 % in excess). Due to the excess length, the two ends will fit closely together so that no gap will occur. Gluing is not necessary. The wiper may easily be pressed into the groove recess with a resulting tight fit.
| d, | D, | H, | L, | a, | n, |
| A2 NBR N3587 | |||||
| 10 | 16 | 5 | 2.6 | 1 | 1 |
| 12 | 20 | 7 | 4 | 1 | 1 |
| 14 | 22 | 7 | 4 | 1 | 1 |
| 16 | 24 | 7 | 4 | 1 | 1 |
| 18 | 26 | 7 | 4 | 1 | 1 |
| 20 | 28 | 7 | 4 | 1 | 1 |
| 22 | 30 | 7 | 4 | 1 | 1 |
| 25 | 33 | 7 | 4 | 1 | 1 |
| 28 | 36 | 7 | 4 | 1 | 1 |
| 30 | 38 | 7 | 4 | 1 | 1 |
| 36 | 44 | 7 | 4 | 1 | 1 |
| 40 | 48 | 7 | 4 | 1 | 1 |
| 45 | 53 | 7 | 4 | 1 | 1 |
| 50 | 58 | 7 | 4 | 1 | 1 |
| 56 | 64 | 7 | 4 | 1 | 1 |
| 60 | 68 | 7 | 4 | 1 | 1 |
| 70 | 78 | 7 | 4 | 1 | 1 |
| 80 | 88 | 7 | 4 | 1 | 1 |
| 90 | 98 | 7 | 4 | 1 | 1 |
| A2 PUR P5008 | |||||
| 20 | 28 | 7 | 4 | 1 | 1 |