Pneumatic Seal OA
The double-acting piston sealing set profile OA consists of a PTFE piston sealing ring and an elastomer O-ring as a preloading element.
• Due to application-optimized geometry and compounds suitable for use in oiled as well as in oil-free air (after initial lubrication on assembly).
• Good sealing performance in extremely small assembly conditions.
• Can also be used for single-acting applications.
• Good wear resistance.
• Minimal break-away and dynamic friction and no stick-slip tendency ensures uniform motion even at low speeds.
• Good energy efficiency due to low friction.
• Very good emergency running properties in low-lube conditions.
• Assembly on one-part piston is possible.
• High temperature resistance assured by suitable O-ring compound selection.
• Adaptable to nearly all media thanks to high chemical resistance of the sealing ring and large O-ring compound selection.
• Short axial assembly length.
• Installation in closed and undercut housings.
• Available in diameters from 4 to 4500 mm.
• Additional sizes of machined products available on short notice.
| Range of application | |
| Piston sealing set for pneumatic applications. | |
| Operating pressure | ≤ 16 bar |
| Operating temperature | -30 °C to +80 °C 1) |
| Sliding speed | ≤ 4 m/s |
Installation
The grooves must be carefully cleaned and deburred. The cylinder bore must have a lead-in chamfer. When fitting the piston sealing ring there is always a risk that the ring may tilt and be sheared off by normal lead-in chamfers (see chapter “General installation guidelines for piston seals, PTFE seals”, fig. 1). We therefore recommend that up to a cylinder diameter of 230 mm a lead-in chamfer according to fig. 2 or detail “A” is considered. In the case of smaller rings which are especially liable to bending we recommend an open-groove design for diameters smaller than 30 mm.
| Size | Groove | O-ring | ||||
| Ø D | Ø d | L | No. | CS | ID | |
| mm | mm | mm | mm | mm | ||
| 0070 | 7 | 3 | 2 | 2-006 | 1.78 | 2.90 |
| 0080 | 8 | 4 | 2 | 2-007 | 1.78 | 3.68 |
| 0090 | 9 | 5 | 2 | 2-008 | 1.78 | 4.47 |
| 0100 | 10 | 6 | 2 | 2-010 | 1.78 | 6.07 |
| 0110 | 11 | 7 | 2 | 2-010 | 1.78 | 6.07 |
| 0120 | 12 | 8 | 2 | 2-011 | 1.78 | 7.65 |
| 0140 | 14 | 10 | 2 | 2-012 | 1.78 | 9.25 |
| 0160 | 16 | 10 | 2.85 | 2-110 | 2.62 | 9.19 |
| 0180 | 18 | 12 | 2.85 | 2-112 | 2.62 | 12.37 |
| 0190 | 19 | 13 | 2.85 | 2-112 | 2.62 | 12.37 |
| 0200 | 20 | 14 | 2.85 | 2-113 | 2.62 | 13.94 |
| 0220 | 22 | 16 | 2.85 | 2-114 | 2.62 | 15.54 |
| 0250 | 25 | 19 | 2.85 | 2-116 | 2.62 | 18.72 |
| 0280 | 28 | 20.50 | 3.80 | 2-211 | 3.53 | 20.22 |
| 0300 | 30 | 22.50 | 3.80 | 2-212 | 3.53 | 21.82 |
| 0320 | 32 | 24.50 | 3.80 | 2-214 | 3.53 | 24.99 |
| 0350 | 35 | 27.50 | 3.80 | 2-215 | 3.53 | 26.57 |
| 0360 | 36 | 28.50 | 3.80 | 2-216 | 3.53 | 28.17 |
| 0380 | 38 | 30.50 | 3.80 | 2-217 | 3.53 | 29.74 |
| 0400 | 40 | 32.50 | 3.80 | 2-219 | 3.53 | 32.92 |
| 0420 | 42 | 34.50 | 3.80 | 2-220 | 3.53 | 34.52 |
| 0450 | 45 | 37.50 | 3.80 | 2-221 | 3.53 | 37.69 |
| 0480 | 48 | 40.50 | 3.80 | 2-223 | 3.53 | 40.87 |
| 0500 | 50 | 37.50 | 5.60 | 2-325 | 5.33 | 37.47 |
| 0550 | 55 | 42.50 | 5.60 | 2-326 | 5.33 | 40.64 |
| 0600 | 60 | 47.50 | 5.60 | 2-328 | 5.33 | 46.99 |
| 0630 | 63 | 50.50 | 5.60 | 2-329 | 5.33 | 50.17 |
| 0650 | 65 | 52.50 | 5.60 | 2-329 | 5.33 | 50.17 |
| 0700 | 70 | 57.50 | 5.60 | 2-331 | 5.33 | 56.52 |
| 0740 | 74 | 61.50 | 5.60 | 2-332 | 5.33 | 59.69 |
| 0750 | 75 | 62.50 | 5.60 | 2-333 | 5.33 | 62.87 |
| 0800 | 80 | 67.50 | 5.60 | 2-334 | 5.33 | 66.04 |
| 0850 | 85 | 72.50 | 5.60 | 2-336 | 5.33 | 72.39 |
| 0900 | 90 | 77.50 | 5.60 | 2-337 | 5.33 | 75.57 |
| 0920 | 92 | 79.50 | 5.60 | 2-338 | 5.33 | 78.74 |
| 1000 | 100 | 87.50 | 5.60 | 2-340 | 5.33 | 85.09 |
| 1050 | 105 | 92.50 | 5.60 | 2-342 | 5.33 | 91.44 |
| 1100 | 110 | 97.50 | 5.60 | 2-344 | 5.33 | 97.79 |
| 1150 | 115 | 102.50 | 5.60 | 2-345 | 5.33 | 100.97 |
| 1200 | 120 | 107.50 | 5.60 | 2-347 | 5.33 | 107.32 |
| 1250 | 125 | 112.50 | 5.60 | 2-348 | 5.33 | 110.49 |
| 1300 | 130 | 115 | 7.55 | 2-425 | 6.99 | 113.67 |
| 1400 | 140 | 125 | 7.55 | 2-428 | 6.99 | 123.19 |
| 1500 | 150 | 135 | 7.55 | 2-431 | 6.99 | 132.72 |
| 1600 | 160 | 145 | 7.55 | 2-435 | 6.99 | 142.24 |
| 2000 | 200 | 182 | 7.55 | 2-441 | 6.99 | 177.17 |
| 2200 | 220 | 202 | 7.55 | 2-444 | 6.99 | 196.22 |