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Piston Seals
The KDAS double-acting piston seal in a robust five part assembly is designed specifically for one piece pistons in a wide range of medium duty applications. The seal is also suitable for two piece pistons.
Comprised of a nitrile rubber sealing element, two split support rings, and two split L-shaped bearings located either side of the seal, the well proven nitrile rubber sealing element is designed to be extremely wear resistant with multi-lips for efficient dynamic sealing with minimal low pressure friction and, when pressurized, will be protected from extrusion damage by the extending lips of the support rings.
The support ring is manufactured from a tough, flexible, wear resistant thermoplastic polyester elastomer (TPE) and scarf cut for assembly.
Both the L-shaped bearings and support rings are grooved to ensure that the fluid pressure properly energises the sealing element and to prevent the possibility of any pressure trapping within the seal assembly.
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Product Application
Used in industrial and walking equipment in the press drive cylinder, support cylinder and working cylinder on the double acting piston.
Features
Feature-oriented and sealed by tne seal itself in a very small space to realize. Seal installation simple, short length, the overall installation of the Pistons. NBR seal the special geometry of the components made at the tiome of installation in the trench will not be distorted.
Working Conditions
| Working Temperature | Working Pressure | Working Medium | Surface speed | Order Mark |
| -35～+100℃ | ≤40MPa | Hydraulic oil lubricating oil | ≤0.5m/s | SYJD-94-35/1 |
Specification Table
| Order No. | Nominal Dimension of Sealing Ring | |||||
| D | d | d1 | d2 | L | L1 | |
| SYJD-94-35/1 | 35 | 25 | 31 | 34 | 15.5 | 2.6 |
| SYJD-94-35/2 | 35 | 25 | 31.4 | 33.5 | 16.4 | 3.35 |
| SYJD-94-40/1 | 40 | 24 | 35.4 | 38.5 | 18.4 | 6.35 |
| SYJD-94-40/2 | 40 | 26 | 36 | 39 | 15.5 | 2.6 |
| SYJD-94-40/3 | 40 | 30 | 35.4 | 38.5 | 16.4 | 6.35 |
| SYJD-94-42 | 42 | 28 | 38 | 41 | 15.5 | 2.6 |
| SYJD-94-45/1 | 45 | 29 | 40.4 | 43.7 | 18.4 | 6.35 |
| SYJD-94-45/2 | 45 | 31 | 41 | 44 | 15.5 | 2.6 |
| SYJD-94-45/3 | 45 | 35 | 40.4 | 43.5 | 16.4 | 3.6 |
| SYJD-94-50/1 | 50 | 34 | 46 | 49 | 20.5 | 6.35 |
| SYJD-94-50/2 | 50 | 34 | 45.4 | 48.5 | 18.4 | 6.35 |
| SYJD-94-50/3 | 50 | 38 | 46 | 49.4 | 20.5 | 4.2 |
| SYJD-94-55/1 | 55 | 39 | 51 | 54 | 20.5 | 3.1 |
| SYJD-94-55/2 | 55 | 39 | 50.36 | 53.5 | 18.4 | 6.35 |
| SYJD-94-56 | 56 | 40 | 52 | 55 | 20.5 | 3.1 |
| SYJD-94-60/1 | 60 | 44 | 56 | 59 | 20.5 | 3.1 |
| SYJD-94-60/2 | 60 | 44 | 55.4 | 58.5 | 18.4 | 6.35 |
| SYJD-94-60/3 | 60 | 48 | 56 | 59.4 | 20.5 | 4.2 |
| SYJD-94-63/1 | 63 | 51 | 59 | 62.4 | 20.5 | 4.2 |
| SYJD-94-63/2 | 63 | 47 | 58.4 | 62 | 20.5 | 3.1 |
| SYJD-94-63/3 | 63 | 47 | 58.4 | 61.5 | 18.4 | 6.35 |
| SYJD-94-65 | 65 | 49 | 61 | 64 | 20.5 | 3.1 |
| SYJD-94-65 | 65 | 50 | 60.4 | 63.5 | 18.4 | 6.35 |
| SYJD-94-70 | 70 | 50 | 64.2 | 68.3 | 22.4 | 6.35 |
| SYJD-94-75 | 75 | 55 | 69.2 | 73.3 | 22.4 | 6.4 |
| SYJD-94-80/1 | 80 | 60 | 74.15 | 78.3 | 22.4 | 6.35 |
| SYJD-94-80/2 | 80 | 62 | 76 | 79 | 22.5 | 3.6 |
| SYJD-94-80/3 | 80 | 66 | 76 | 79.4 | 22.5 | 5.2 |
| SYJD-94-85 | 85 | 65 | 79.15 | 83.3 | 22.4 | 6.35 |
| SYJD-94-90/1 | 90 | 70 | 84.15 | 88.3 | 22.5 | 6.35 |
| SYJD-94-90/2 | 90 | 72 | 86 | 89 | 22.5 | 3.6 |
| SYJD-94-90/3 | 90 | 76 | 86 | 89.4 | 22.5 | 5.2 |
| SYJD-94-95 | 95 | 75 | 89.15 | 93.3 | 22.4 | 6.35 |
| SYJD-94-100/1 | 100 | 75 | 93.15 | 98 | 22.4 | 6.35 |
| SYJD-94-100/2 | 100 | 82 | 96 | 99 | 22.5 | 3.6 |
| SYJD-94-100/3 | 100 | 86 | 96 | 99.4 | 22.5 | 5.2 |
| SYJD-94-105 | 105 | 80 | 98.1 | 103 | 22.4 | 6.35 |
| SYJD-94-110/1 | 110 | 85 | 103.1 | 108 | 22.4 | 6.35 |
| SYJD-94-110/2 | 110 | 92 | 106 | 109 | 22.5 | 3.6 |
| Order No. | Nominal Dimension of Sealing Ring | |||||
| D | d | d1 | d2 | L | L1 | |
| SYJD-94-110/3 | 110 | 96 | 106 | 109.4 | 22.5 | 5.2 |
| SYJD-94-115/1 | 115 | 90 | 108.1 | 113 | 22.4 | 6.35 |
| SYJD-94-115/2 | 115 | 97 | 111 | 114 | 22.5 | 3.6 |
| SYJD-94-120/1 | 120 | 95 | 113.1 | 118.1 | 22.4 | 6.35 |
| SYJD-94-120/2 | 120 | 106 | 116 | 119.4 | 22.5 | 5.2 |
| SYJD-94-125/1 | 125 | 100 | 118.1 | 123 | 25.4 | 6.35 |
| SYJD-94-125/2 | 125 | 103 | 121 | 124.4 | 26.5 | 5.1 |
| SYJD-94-125/3 | 125 | 108 | 121 | 124.4 | 26.5 | 7.2 |
| SYJD-94-130/1 | 130 | 105 | 123.1 | 128 | 25.4 | 6.35 |
| SYJD-94-130/2 | 130 | 105 | 122.6 | 127.5 | 25.4 | 9.5 |
| SYJD-94-135/1 | 135 | 110 | 127.6 | 132.5 | 25.4 | 9.5 |
| SYJD-94-135/2 | 140 | 110 | 128.1 | 133 | 25.4 | 6.35 |
| SYJD-94-140/1 | 140 | 115 | 132.6 | 137.5 | 25.4 | 9.5 |
| SYJD-94-140/2 | 140 | 115 | 133 | 138 | 25.4 | 6.35 |
| SYJD-94-140/3 | 140 | 123 | 136 | 139.4 | 26.5 | 7.2 |
| SYJD-94-140/4 | 140 | 118 | 136 | 139 | 26.5 | 5.1 |
| SYJD-94-145/1 | 145 | 120 | 138.3 | 143 | 25.4 | 6.35 |
| SYJD-94-145/2 | 145 | 120 | 137.6 | 142.5 | 25.4 | 9.5 |
| SYJD-94-150 | 150 | 125 | 142.6 | 147.5 | 25.4 | 9.5 |
| SYJD-94-150/1 | 150 | 125 | 143 | 148 | 25.4 | 6.35 |
| SYJD-94-150/2 | 150 | 128 | 146 | 148 | 26.5 | 5.1 |
| SYJD-94-150/3 | 150 | 133 | 146 | 149.4 | 26.5 | 7.2 |
| SYJD-94-155 | 155 | 130 | 147.6 | 152.5 | 25.4 | 9.5 |
| SYJD-94-160 | 160 | 130 | 153 | 157.5 | 25.4 | 6.35 |
| SYJD-94-160/1 | 160 | 135 | 152.6 | 157.5 | 25.4 | 9.5 |
| SYJD-94-165 | 165 | 140 | 157.6 | 162.5 | 25.4 | 9.5 |
| SYJD-94-170 | 170 | 145 | 161.7 | 167.1 | 25.4 | 12.7 |
| SYJD-94-175 | 175 | 150 | 166.7 | 172.1 | 25.4 | 12.7 |
| SYJD-94-180 | 180 | 155 | 171.7 | 177.1 | 25.4 | 12.7 |
| SYJD-94-180/1 | 180 | 150 | 173 | 177.9 | 35.4 | 6.35 |
| SYJD-94-185 | 185 | 160 | 176.7 | 182.1 | 25.4 | 12.7 |
| SYJD-94-190 | 190 | 165 | 181.7 | 187 | 25.4 | 12.7 |
| SYJD-94-195 | 195 | 170 | 186.7 | 192 | 25.4 | 12.7 |
| SYJD-94-200 | 200 | 175 | 191.6 | 197 | 25.4 | 12.7 |
| SYJD-94-210 | 210 | 185 | 201.6 | 207 | 25.4 | 12.7 |
| SYJD-94-220 | 220 | 195 | 211.6 | 217 | 25.4 | 12.7 |
| SYJD-94-230 | 230 | 205 | 221.6 | 227 | 25.4 | 12.7 |
| SYJD-94-240 | 240 | 215 | 231.6 | 237 | 25.4 | 12.7 |
| SYJD-94-250 | 250 | 225 | 241.6 | 247 | 25.4 | 12.7 |
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