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MPS 聚氨酯杆密封件专为高压单作用 U 型杯杆密封件设计，也可用作液压缸活塞杯密封件。由 PU 材料和 NBR 方形环制成，是聚氨酯杆密封件的一种。
设计说明：
MPS型是唇形密封进步发展的结果。它兼有高弹性星形圈和唇形密封材料 耐磨性的优点。
这种特殊的密封件因其特殊的结构（衣酕的星形圈），主要用于行走设备。这个星形圈保证了密封唇口在低压或真空条件下的预压缩量。温度变化对密封性能影响小，并且即使发生某种程度的磨损也会保证必要的预压缩量。唇口由于系统压力的增加而负载，这种系统压力通过受压变形的星形圈传递至唇上。
其优点为：
▪对震动载荷和压力峰值的不敏感性
▪很高的抗挤压性
▪在无载和低温的条件下具有理想的密封作用
▪适用于最苛刻的工作条件
应用范围
MPS 是一种单作用杆密封件，用于重型农业、土方工程和工业机械，适用于低压和高压应用。可选尼龙支撑环将增加最大密封压力。
| 压力 | 40Mpa | |||
| 速度 | 0.5m/s | |||
| 材料（PU） | U3091 | U4031 | U2051 | U2041 |
| 温度(°C) | -45+100 | -35+100 | -25+120 | -30+120 |
| 介质 | 矿物基液压油 | |||
最大间隙（e1mm）
| Depth S | 16MPa | 25MPa | 40MPa |
| 4 | 0.4 | 0.3 | 0.15 |
| 5 | 0.5 | 0.4 | 0.2 |
| 7.5 | 0.55 | 045 | 0.25 |
| 10 | 0.6 | 0.5 | 0.3 |
| 最大工作压力 | 14MPa | 21MPa | 35MPa |
| 垫片材料 | (PTFE) | ||
| e2 | e1+0.5 | e1+0.25 | e1+0.1 |
| 最大工作压力 | 35Mpa | 42Mpa | 70Mpa |
| 垫片材料 | （NYLON） | ||
| e2 | e1+0.4 | e1+0.2 | e1+0.1 |
| d | D | h | H |
| 14 | 22 | 5 | 5.7 |
| 16 | 24 | 5 | 5.7 |
| 16 | 24 | 5.7 | 6.3 |
| 18 | 26 | 5 | 5.7 |
| 18 | 26 | 5.7 | 6.3 |
| 20 | 28 | 5 | 5.7 |
| 20 | 28 | 5.7 | 6.3 |
| 20 | 28 | 6.3 | 7 |
| 22 | 30 | 5 | 5.7 |
| 22 | 30 | 5.7 | 6.3 |
| 22 | 30 | 6.3 | 7 |
| 25 | 33 | 5 | 5.7 |
| 25 | 33 | 5.7 | 6.3 |
| 25 | 33 | 6.3 | 7 |
| 25 | 35 | 6 | 7 |
| 28 | 36 | 5 | 5.7 |
| 28 | 36 | 5.7 | 6.3 |
| 28 | 36 | 6.3 | 7 |
| 28 | 38 | 6 | 7 |
| 28 | 38 | 7 | 8 |
| 30 | 38 | 5 | 5.7 |
| 30 | 38 | 5.7 | 6.3 |
| 30 | 38 | 6.3 | 7 |
| 30 | 40 | 6 | 7 |
| 30 | 40 | 7 | 8 |
| 30 | 40 | 8 | 9 |
| 32 | 40 | 6.3 | 7 |
| 32 | 42 | 6 | 7 |
| 32 | 42 | 7 | 8 |
| 32 | 42 | 8 | 9 |
| 35 | 43 | 6.3 | 7 |
| 35 | 45 | 6 | 7 |
| 35 | 45 | 7 | 8 |
| 35 | 45 | 8 | 9 |
| 36 | 46 | 6 | 7 |
| 36 | 46 | 7 | 8 |
| 36 | 46 | 8 | 9 |
| 38 | 48 | 6 | 7 |
| 38 | 48 | 7 | 8 |
| 38 | 48 | 8 | 9 |
| 40 | 50 | 6 | 7 |
| d | D | h | H |
| 40 | 50 | 7 | 8 |
| 40 | 50 | 8 | 9 |
| 40 | 55 | 9 | 10 |
| 40 | 53 | 10 | 11 |
| 45 | 55 | 6 | 7 |
| 45 | 55 | 7 | 8 |
| 45 | 55 | 8 | 9 |
| 45 | 60 | 9 | 10 |
| 45 | 58 | 10 | 11 |
| 45 | 60 | 11.4 | 12.5 |
| 50 | 60 | 6 | 7 |
| 50 | 60 | 7 | 8 |
| 50 | 60 | 8 | 9 |
| 50 | 65 | 9 | 10 |
| 50 | 63 | 10 | 11 |
| 50 | 65 | 11.4 | 12.5 |
| 53 | 63 | 6 | 7 |
| 53 | 63 | 7 | 8 |
| 53 | 63 | 8 | 9 |
| 55 | 65 | 6 | 7 |
| 55 | 65 | 7 | 8 |
| 55 | 65 | 8 | 9 |
| 55 | 70 | 9 | 10 |
| 55 | 68 | 10 | 11 |
| 55 | 70 | 11.4 | 12.5 |
| 56 | 71 | 11.4 | 12.5 |
| 60 | 70 | 6 | 7 |
| 60 | 70 | 7 | 8 |
| 60 | 70 | 8 | 9 |
| 60 | 75 | 9 | 10 |
| 60 | 73 | 10 | 11 |
| 60 | 75 | 11.4 | 12.5 |
| 63 | 73 | 6 | 7 |
| 63 | 73 | 7 | 8 |
| 63 | 73 | 8 | 9 |
| 63 | 78 | 9 | 10 |
| 63 | 78 | 11.4 | 12.5 |
| 65 | 75 | 6 | 7 |
| 65 | 75 | 7 | 8 |
| 65 | 75 | 8 | 9 |
| 65 | 80 | 9 | 10 |
| d | D | h | H |
| 65 | 78 | 10 | 11 |
| 65 | 80 | 11.4 | 12.5 |
| 70 | 80 | 6 | 7 |
| 70 | 80 | 7 | 8 |
| 70 | 80 | 8 | 9 |
| 70 | 85 | 9 | 10 |
| 70 | 83 | 10 | 11 |
| 70 | 85 | 11.4 | 12.5 |
| 71 | 81 | 6 | 7 |
| 71 | 81 | 7 | 8 |
| 71 | 81 | 8 | 9 |
| 75 | 85 | 6 | 7 |
| 75 | 85 | 7 | 8 |
| 75 | 85 | 8 | 9 |
| 75 | 90 | 9 | 10 |
| 75 | 88 | 10 | 11 |
| 75 | 90 | 11.4 | 12.5 |
| 80 | 90 | 6 | 7 |
| 80 | 90 | 7 | 8 |
| 80 | 90 | 8 | 9 |
| 80 | 95 | 9 | 10 |
| 80 | 93 | 10 | 11 |
| 80 | 95 | 10 | 11 |
| 80 | 95 | 11.4 | 12.5 |
| 80 | 100 | 12 | 13 |
| 85 | 100 | 9 | 10 |
| 85 | 98 | 10 | 11 |
| 85 | 100 | 10 | 11 |
| 85 | 100 | 11.4 | 12.5 |
| 85 | 105 | 12 | 13 |
| 90 | 105 | 9 | 10 |
| 90 | 105 | 10 | 11 |
| 90 | 105 | 11.4 | 12.5 |
| 90 | 110 | 12 | 13 |
| 95 | 110 | 9 | 10 |
| 95 | 110 | 10 | 11 |
| 95 | 110 | 11.4 | 12.5 |
| 95 | 115 | 12 | 13 |
| 100 | 115 | 9 | 10 |
| 100 | 115 | 10 | 11 |
| 100 | 115 | 11.4 | 12.5 |
| d | D | h | H |
| 100 | 120 | 12 | 13 |
| 100 | 120 | 15 | 16 |
| 105 | 120 | 9 | 10 |
| 105 | 120 | 10 | 11 |
| 105 | 125 | 12 | 13 |
| 105 | 125 | 15 | 16 |
| 110 | 125 | 9 | 10 |
| 110 | 125 | 10 | 11 |
| 110 | 130 | 10 | 11 |
| 110 | 130 | 12 | 13 |
| 110 | 130 | 15 | 16 |
| 115 | 130 | 9 | 10 |
| 115 | 130 | 10 | 11 |
| 115 | 135 | 12 | 13 |
| 115 | 135 | 15 | 16 |
| d | D | h | H |
| 120 | 135 | 9 | 10 |
| 120 | 135 | 10 | 11 |
| 120 | 140 | 10 | 11 |
| 120 | 140 | 12 | 13 |
| 120 | 140 | 15 | 16 |
| 120 | 140 | 15 | 16 |
| 125 | 140 | 9 | 10 |
| 130 | 145 | 9 | 10 |
| 130 | 150 | 12 | 13 |
| 130 | 150 | 15 | 16 |
| 135 | 150 | 9 | 10 |
| 140 | 155 | 9 | 10 |
| 140 | 160 | 12 | 13 |
| 140 | 160 | 15 | 16 |
| 145 | 160 | 9 | 10 |
| d | D | h | H |
| 150 | 165 | 9 | 10 |
| 150 | 170 | 12 | 13 |
| 150 | 170 | 15 | 16 |
| 155 | 170 | 9 | 10 |
| 160 | 175 | 9 | 10 |
| 160 | 180 | 12 | 13 |
| 160 | 180 | 15 | 16 |
| 170 | 190 | 12 | 13 |
| 170 | 190 | 15 | 16 |
| 180 | 200 | 12 | 13 |
| 180 | 200 | 15 | 16 |
| 190 | 210 | 12 | 13 |
| 190 | 210 | 15 | 16 |
| 200 | 220 | 12 | 13 |
| 200 | 220 | 15 | 16 |
| mm | inch | ||||||
| d | D | h | H | d | D | h | H |
| 38.1 | 47.62 | 9.53 | 10.3 | 1.500 | 1.875 | 0.375 | 0.413 |
| 44.45 | 53.97 | 9.53 | 10.3 | 1.750 | 2.125 | 0.375 | 0.413 |
| 50.8 | 60.32 | 9.53 | 10.3 | 2.000 | 2.375 | 0.375 | 0.413 |
| 57.15 | 66.67 | 9.53 | 10.3 | 2.250 | 2.625 | 0.375 | 0.413 |
| 38.1 | 50.8 | 9.53 | 10.5 | 1.500 | 2.000 | 0.375 | 0.413 |
| 44.45 | 57.15 | 9.53 | 10.5 | 1.750 | 2.250 | 0.375 | 0.413 |
| 50.8 | 63.5 | 9.53 | 10.5 | 2.000 | 2.500 | 0.375 | 0.413 |
| 57.15 | 69.85 | 9.53 | 10.5 | 2.250 | 2.750 | 0.375 | 0.413 |
| 63.5 | 76.2 | 9.53 | 10.5 | 2.500 | 3.000 | 0.375 | 0.413 |
| 69.85 | 82.55 | 9.53 | 10.5 | 2.750 | 3.250 | 0.375 | 0.413 |
| 76.2 | 88.9 | 9.53 | 10.5 | 3.000 | 3.500 | 0.375 | 0.413 |
| 82.55 | 95.25 | 9.53 | 10.5 | 3.250 | 3.750 | 0.375 | 0.413 |
| 88.9 | 101.6 | 9.53 | 10.5 | 3.500 | 4.000 | 0.375 | 0.413 |
| 95.25 | 107.95 | 9.53 | 10.5 | 3.750 | 4.250 | 0.375 | 0.413 |
| 101.6 | 114.3 | 9.53 | 10.5 | 4.000 | 4.500 | 0.375 | 0.413 |
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