Daq2 -High Quality PTFE Rubber Hydraulic Piston Seal with NBR/FKM O-Ring
DAQ2
Quantity:
1. Application and properties
Suitable for double-acting sealing of reciprocating motion pistons. Composed of four pieces, with a rubber star-shaped ring in the middle and a rubber O-ring at the bottom, with a PTFE-filled sealing slip ring.
It has dual safety with low friction and high elasticity, low gas permeability, and good dynamic and static sealing performance.
Allows for a large extrusion gap and is suitable for high-pressure oil cylinders where position or pressure retention requirements are strict and the movement speed is not particularly fast (<0.5m/s), such as pressure machine oil cylinders, support oil cylinders, clamping oil cylinders, positioning oil cylinders, piston accumulators, etc. Especially recommended for heavy-duty and large-diameter applications. In high-pressure applications, the friction coefficient is small, the sliding performance is good, and there is no creeping phenomenon. The groove structure is simple and the installation is convenient.
It can adapt to a wide range of working media and working temperature range by changing the material of O-ring and star-shaped ring. It is suitable for integral piston with small groove installation.
Compliant with GB/T 15242.1-94 and GB/T 15242.3-94 standards.
2. Standard material
Sealing ring: filled PTFE
O-Ring: NBR / FKM
X-Ring: NBR / FKM
3. Working conditions
Working Conditions | ||||
Diameter Range | Pressure Range | Temperature Range°C | Speed | Medium |
40～2000mm | 0～20MPa | -30～100(NBR) -20～160(FKM) | 0.5m/s | Hydraulic oil, flame retardant liquid, water, |
4. Related Dimensions:
R2=0.5～2;C=(0.5～1.0)L；The specific values are selected according to the section size of the seal. The remaining values are listed in the table below:
| Bore Diameter | Groove | Groove | Radius | Radial Clearance | O-Ring | X ring Seal | |||
| D | Diameter | Width | e max | Cross-Section | Cross-Sction | ||||
| Standard | Heavy Duty | d | H | R1 | 10 | 20 | 30 | d1 | W |
| Application | Application | MPa | MPa | MPa | |||||
| 40～79.9 | 25～140 | D-10 | 6.3 | 0.3 | 0.3 | 0.2 | 0.15 | 2.62 | 1.78 |
| 80～132.9 | 50～250 | D-13 | 8.3 | 0.5 | 0.4 | 0.3 | 0.15 | 3.53 | 2.62 |
| 133～252.9 | 100～480 | D-18 | 12.3 | 0.6 | 0.4 | 0.3 | 0.2 | 5.33 | 3.53 |
| 463～700 | 425～700 | D-31 | 16.3 | 1 | 0.5 | 0.4 | 0.3 | 6.99 | 5.33 |
5. Marking method:
Mark with the dimension of installation groove as below
For example: marked as DAQ2-100×87×8.3
6. Installation Dimensions
| Bore | Groove | Groove | Part No. | O-ring | X-ring |
| Dia | Dia. | Width | Dimensions | Dimensions | |
| D | d | L | |||
| 40 | 30 | 6.3 | DAQ20400 | 29.82×2.62 | 34.65×1.78 |
| 42 | 32 | 6.3 | DAQ20420 | 31.42×2.62 | 37.82×1.78 |
| 45 | 35 | 6.3 | DAQ20450 | 34.59×2.62 | 37.82×1.78 |
| 48 | 38 | 6.3 | DAQ20480 | 37.77×2.62 | 41.00×1.78 |
| 50 | 40 | 6.3 | DAQ20500 | 39.34×2.62 | 44.17×1.78 |
| 52 | 42 | 6.3 | DAQ20520 | 40.94×2.62 | 47.35×1.78 |
| 55 | 45 | 6.3 | DAQ20550 | 44.12×2.62 | 50.52×1.78 |
| 60 | 50 | 6.3 | DAQ20600 | 48.90×2.62 | 53.70×1.78 |
| 63 | 53 | 6.3 | DAQ20630 | 52.07×2.62 | 56.87×1.78 |
| 65 | 55 | 6.3 | DAQ20650 | 53.64×2.62 | 60.05×1.78 |
| 70 | 60 | 6.3 | DAQ20700 | 58.42×2.62 | 63.22×1.78 |
| 75 | 65 | 6.3 | DAQ20750 | 63.17×2.62 | 69.57×1.78 |
| 80 | 67 | 8.3 | DAQ20800 | 66.27×3.53 | 71.12×2.62 |
| 85 | 72 | 8.3 | DAQ20850 | 69.44×3.53 | 75.87×2.62 |
| 90 | 77 | 8.3 | DAQ20900 | 75.79×3.53 | 82.22×2.62 |
| 95 | 82 | 8.3 | DAQ20950 | 78.97×3.53 | 82.22×2.62 |
| 100 | 87 | 8.3 | DAQ21000 | 85.32×3.53 | 88.57×2.62 |
| 105 | 92 | 8.3 | DAQ21050 | 91.67×3.53 | 94.92×2.62 |
| 110 | 97 | 8.3 | DAQ21100 | 94.84×3.53 | 101.27×2.62 |
| 115 | 102 | 8.3 | DAQ21150 | 101.19×3.53 | 107.62×2.62 |
| 120 | 107 | 8.3 | DAQ21200 | 104.37×3.53 | 107.62×2.62 |
| 125 | 112 | 8.3 | DAQ21250 | 110.72×3.53 | 113.97×2.62 |
| 130 | 117 | 8.3 | DAQ21300 | 113.89×3.53 | 120.32×2.62 |
| 135 | 117 | 12.3 | DAQ21350 | 113.67×5.33 | 123.42×3.53 |
| 140 | 122 | 12.3 | DAQ21400 | 120.02×5.33 | 126.60×3.53 |
| 150 | 132 | 12.3 | DAQ21500 | 129.54×5.33 | 136.12×3.53 |
| 160 | 142 | 12.3 | DAQ21600 | 139.07×5.33 | 145.65×3.53 |
| 170 | 152 | 12.3 | DAQ21700 | 148.49×5.33 | 158.35×3.53 |
| 180 | 162 | 12.3 | DAQ21800 | 158.12×5.33 | 164.70×3.53 |
| 190 | 172 | 12.3 | DAQ21900 | 170.82×5.33 | 177.40×3.53 |
| 200 | 182 | 12.3 | DAQ22000 | 177.17×5.33 | 183.75×3.53 |
| 210 | 192 | 12.3 | DAQ22100 | 189.87×5.33 | 196.45×3.53 |
| 220 | 202 | 12.3 | DAQ22200 | 196.22×5.33 | 202.80×3.53 |
| 230 | 212 | 12.3 | DAQ22300 | 208.92×5.33 | 215.50×3.53 |
| 240 | 222 | 12.3 | DAQ22400 | 221.62×5.33 | 221.85×3.53 |
| 250 | 232 | 12.3 | DAQ22500 | 227.97×5.33 | 234.55×3.53 |
| 280 | 262 | 12.3 | DAQ22800 | 253.37×5.33 | 266.29×3.53 |
| 300 | 282 | 12.3 | DAQ23000 | 278.77×5.33 | 278.99×3.53 |
| 320 | 302 | 12.3 | DAQ23200 | 291.47×5.33 | 304.39×3.53 |
| 350 | 332 | 12.3 | DAQ23500 | 329.57×5.33 | 329.79×3.53 |
| 400 | 382 | 12.3 | DAQ24000 | 380.37×5.33 | 380.59×3.53 |
| 420 | 402 | 12.3 | DAQ24200 | 405.26×5.33 | 380.59×3.53 |
| 450 | 432 | 12.3 | DAQ24500 | 430.66×5.33 | 430.66×3.53 |
| 480 | 449 | 16.3 | DAQ24800 | 443.36×6.99 | 456.06×5.33 |
| 500 | 469 | 16.3 | DAQ25000 | 468.76×6.99 | 478.76×5.33 |
| 600 | 569 | 16.3 | DAQ26000 | 557.66×6.99 | 587.58×5.33 |
| 700 | 669 | 16.3 | DAQ27000 | 658.88×6.99 | 688.88×5.33 |
