Pneumatic Seal DK
The double-acting profile DK is a complete pneumatic piston with a double cup seal and a vulcanized metal disc support. It performs two functions:
Sealing and guiding.
• Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
• Immediate response (full pressure load) thanks to incorporated venting channels.
• Good wear resistance.
• Ideal corrosion protection thanks to complete elastomer covering.
• Smooth running due to optimum adjustment of the functional lips.
• Easy attachment to the piston rod without additional sealing elements.
• Easy installation due to integrated static sealing function.
• Excellent media resistance in case of suitable compound selection.
• Low assembly height of the complete piston enables short cylinder designs.
• Versatile complete piston for nearly all cylinder designs.
| Range of application | |
| Complete piston for double-acting pneumatic cylin-ders with and without cushioning, provided that no excessive lateral guidance loads will occur (long strokes and buckling). | |
| Operating pressure | ≤ 16 bar |
| Operating temperature | |
| DK NBR Z5051 | -30 °C to +80 °C |
| DK PUR Z5071 | -35 °C to +80 °C |
| Sliding speed | ≤ 1 m/s |
| Media | Compressed air, both lubricated and oil free (after greasing for fitting) |
Installation
The profile DK pneumatic complete piston is fixed to the piston rod with a locknut to avoid loosening. For use with dry and oil-free air, the piston and cylinder tube must be prelubricated with a suitable long-life lubricant.It must be assured that the sealing lips do not touch the cylinder bottom and the cylinder cap at the limit stops (see also dimension „Ø dm“).
| D, | d, | H, | S, | h, | d a , | h1, | dm, |
| DK NBR Z5051 | |||||||
| 16 | 5 | 12 | 3 | 6 | 9 | 3.6 | 12 |
| 20 | 5 | 12 | 3 | 6 | 10 | 3.6 | 16 |
| 20 | 6 | 12 | 3 | 6 | 10 | 3.6 | 16 |
| 25 | 6 | 12 | 3 | 6 | 13.5 | 3.6 | 21 |
| 25 | 8 | 12 | 3 | 4 | 16 | 3.6 | 21 |
| 25 | 8 | 12 | 3 | 6 | 16 | 3.6 | 21 |
| 32 | 5 | 18 | 3 | 6 | 16 | 3.6 | 26.5 |
| 32 | 6 | 15 | 3 | 6 | 16 | 3.6 | 26.5 |
| 32 | 8 | 15 | 3 | 6 | 16 | 3.6 | 26.5 |
| 32 | 8 | 15 | 3 | 6.5 | 16 | 4 | 26.5 |
| 35 | 8 | 15 | 3 | 6 | 16 | 3.6 | 29.5 |
| 40 | 8 | 18 | 4 | 7 | 22 | 4.6 | 34 |
| 40 | 8 | 20 | 4 | 6.5 | 22 | 4.6 | 34 |
| 40 | 10 | 18 | 4 | 7 | 22 | 4.6 | 34 |
| 50 | 8 | 20 | 4 | 6.5 | 25 | 4.6 | 43 |
| 50 | 10 | 18 | 4 | 7.8 | 25 | 4.6 | 43 |
| 50 | 16 | 20.5 | 4 | 7 | 25 | 4.6 | 43 |
| 60 | 12 | 21 | 4 | 6.5 | 37 | 4.6 | 52 |
| 60 | 18 | 21 | 4 | 6.5 | 37 | 4.6 | 52 |
| 63 | 12 | 22 | 5 | 8 | 40 | 5.6 | 55 |
| 63 | 16 | 21.5 | 4 | 7 | 40 | 4.6 | 55 |
| 70 | 12 | 22 | 5 | 8 | 44 | 5.6 | 62 |
| 70 | 33 | 22 | 5 | 8 | 44 | 5.6 | 62 |
| 80 | 12 | 22.5 | 5 | 8 | 55 | 5.6 | 70 |
| 80 | 16 | 22.5 | 5 | 8 | 55 | 5.6 | 70 |
| 80 | 20 | 22.5 | 5 | 8 | 55 | 5.6 | 70 |
| 100 | 12 | 25 | 6 | 10 | 72 | 6.6 | 90 |
| 100 | 16 | 25 | 6 | 10 | 72 | 6.6 | 90 |
| 100 | 20 | 26 | 6 | 10 | 72 | 6.6 | 90 |
| 125 | 20 | 26 | 5 | 9.5 | 90 | 5.6 | 114 |
| 125 | 20 | 28 | 7 | 12 | 90 | 8.2 | 114 |
| 130 | 20 | 29 | 8 | 13 | 98 | 8.6 | 123 |
| 140 | 22 | 29 | 6 | 10.5 | 108 | 6.6 | 125 |
| 150 | 20 | 29 | 10 | 13 | 100 | 10.6 | 143 |
| 160 | 27 | 29 | 6 | 10.5 | 110 | 6.6 | 145 |
| 160 | 30 | 29 | 6 | 10.5 | 110 | 6.6 | 145 |
| 200 | 27 | 35 | 10 | 14.5 | 150 | 10.6 | 180 |
| 200 | 30 | 35 | 10 | 13 | 150 | 10.6 | 180 |
| 250 | 30 | 40 | 12 | 15 | 180 | 12.6 | 240.6 |
| 250 | 30 | 40 | 15 | 18 | 180 | 15.6 | 240.6 |
| DK PUR Z5071 | |||||||
| 32 | 8 | 15 | 3 | 6 | 16 | 4.4 | 26.5 |
| 40 | 10 | 18 | 4 | 7 | 22 | 5.4 | 34 |
| 50 | 10 | 18 | 4 | 7.5 | 25 | 5.4 | 43 |
| 63 | 16 | 21.5 | 4 | 7 | 40 | 5.4 | 55 |
| 63.5 | 11.12 | 22 | 5 | 8 | 40.5 | 7 | 56 |