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Piston Seals
Sealing ring: F-PTFE
Elastomer: NBR or FKM
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Application Range
This is a kind of standard combined seals used in large scale applications.
Please refer to standards of SPN series of NOK Company when designing and selecting.
Features
The used sliding material is filled with PTFE, and such seals have very low friction and thus can eliminate crawling to guarantee high abrasion resistance.Since single seal has a bidirectional sealing capability, the installation space can be eliminated.
Working Conditions
| Speed | Pressure Range | TemperatureRange | Media | AvailableDiameter Range |
| 1.5m/s | 0~35MPa | -30℃ +200℃ | Commonly used petroleum basehydraulic oil, water, Ethyleneglycol hydraulic oil, oil and wateremulsifying hydraulic oil | 30-1650mm |
Specification Table
| Order No. | Cylinder Diameter | Bottom Diameter | Width |
| D | d | L+0.2 | |
| MAIS-21-30 | 30 | 20.5 | 4.5 |
| MAIS-21-31.5 | 31.5 | 22 | 4.5 |
| MAIS-21-32 | 32 | 22.5 | 4.5 |
| MAIS-21-35 | 35 | 25.5 | 4.5 |
| MAIS-21-35.5 | 35.5 | 26 | 4.5 |
| MAIS-21-40 | 40 | 30 | 4.5 |
| MAIS-21-45 | 45 | 35 | 4.5 |
| MAIS-21-50 | 50 | 40 | 4.5 |
| MAIS-21-55 | 55 | 45 | 4.5 |
| MAIS-21-56 | 56 | 46 | 4.5 |
| MAIS-21-60 | 60 | 50 | 4.5 |
| MAIS-21-63 | 63 | 48 | 7.5 |
| MAIS-21-65 | 65 | 50 | 7.5 |
| MAIS-21-69 | 69 | 54 | 7.5 |
| MAIS-21-70 | 70 | 55 | 7.5 |
| MAIS-21-71 | 71 | 56 | 7.5 |
| MAIS-21-75 | 75 | 60 | 7.5 |
| MAIS-21-80 | 80 | 65 | 7.5 |
| MAIS-21-85 | 85 | 70 | 7.5 |
| MAIS-21-90 | 90 | 75 | 7.5 |
| MAIS-21-95 | 95 | 80 | 7.5 |
| MAIS-21-100 | 100 | 85 | 7.5 |
| MAIS-21-108 | 108 | 92 | 7.5 |
| MAIS-21-110 | 110 | 94 | 7.5 |
| MAIS-21-112 | 112 | 96 | 7.5 |
| MAIS-21-120 | 120 | 104 | 7.5 |
| MAIS-21-125 | 125 | 109 | 7.5 |
| MAIS-21-130 | 130 | 114 | 7.5 |
| MAIS-21-550 | 550 | 515 | 17.5 |
| MAIS-21-600 | 600 | 570 | 15 |
| MAIS-21-650 | 650 | 620 | 15 |
| MAIS-21-720 | 720 | 690 | 15 |
| MAIS-21-800 | 800 | 785 | 13 |
| MAIS-21-900 | 900 | 870 | 15 |
| MAIS-21-930 | 930 | 890 | 20 |
| MAIS-21-935 | 935 | 920 | 13 |
| MAIS-21-950 | 950 | 925 | 18 |
| MAIS-21-1000 | 1000 | 960 | 20 |
| Order No. | Cylinder Diameter | Bottom Diameter | Width |
| D | d | L+0.2 | |
| MAIS-21-140 | 140 | 124 | 7.5 |
| MAIS-21-145 | 145 | 129 | 7.5 |
| MAIS-21-150 | 150 | 134 | 7.5 |
| MAIS-21-155 | 155 | 139 | 7.5 |
| MAIS-21-160 | 160 | 144 | 7.5 |
| MAIS-21-170 | 170 | 148 | 11 |
| MAIS-21-180 | 180 | 158 | 11 |
| MAIS-21-190 | 190 | 168 | 11 |
| MAIS-21-200 | 200 | 178 | 11 |
| MAIS-21-204 | 204 | 182 | 11 |
| MAIS-21-210 | 210 | 188 | 11 |
| MAIS-21-220 | 220 | 198 | 11 |
| MAIS-21-224 | 224 | 202 | 11 |
| MAIS-21-225 | 225 | 203 | 11 |
| MAIS-21-230 | 230 | 208 | 11 |
| MAIS-21-240 | 240 | 218 | 11 |
| MAIS-21-250 | 250 | 228 | 11 |
| MAIS-21-260 | 260 | 236 | 12 |
| MAIS-21-270 | 270 | 246 | 12 |
| MAIS-21-280 | 280 | 256 | 12 |
| MAIS-21-290 | 290 | 266 | 12 |
| MAIS-21-300 | 300 | 276 | 12 |
| MAIS-21-310 | 310 | 286 | 12 |
| MAIS-21-320 | 320 | 296 | 12 |
| MAIS-21-330 | 330 | 308 | 10 |
| MAIS-21-360 | 360 | 336 | 12 |
| MAIS-21-485 | 485 | 455 | 15 |
| MAIS-21-500 | 500 | 470 | 15 |
| MAIS-21-1060 | 1060 | 1020 | 20 |
| MAIS-21-1120 | 1120 | 1080 | 20 |
| MAIS-21-1150 | 1150 | 1110 | 20 |
| MAIS-21-1180 | 1180 | 1130 | 20 |
| MAIS-21-1210 | 1210 | 1170 | 20 |
| MAIS-21-1250 | 1250 | 1210 | 20 |
| MAIS-21-1260 | 1260 | 1220 | 20 |
| MAIS-21-1400 | 1400 | 1350 | 20 |
| MAIS-21-1500 | 1500 | 1460 | 20 |
| MAIS-21-1165 | 1650 | 1600 | 25 |
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