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SPG 是双作用活塞密封件，标准紧凑型，适用范围广。经过CNC 精密加工而成，采用填充铜粉的 PTFE 和方形丁腈橡胶环制成。
设计说明：
滑动材料用填充聚四氟乙烯，此密封件具有很低的摩擦阻力，消除了爬行，确保有很高的耐磨性。因单个密封件有双向密封能力，故省去了安装空间。弹性体为方形结构，提高了密封件的稳定性。这是一种大范围应用的标准组合密封，应用于活塞上。
| 名称 | D | d | h | H |
| SPG | 40 | 30 | 4.3 | 4.5 |
| SPG | 45 | 35 | ||
| SPG | 50 | 40 | ||
| SPG | 55 | 45 | ||
| SPG | 56 | 46 | ||
| SPG | 60 | 50 | ||
| SPG | 65 | 55 | ||
| SPG | 70 | 60 | ||
| SPG | 80 | 70 | ||
| SPG | 90 | 80 | ||
| SPG | 100 | 90 | ||
| SPG | 63 | 48 | 7.3 | 7.5 |
| SPG | 65 | 50 | ||
| SPG | 70 | 55 | ||
| SPG | 75 | 60 | ||
| SPG | 80 | 65 | ||
| SPG | 85 | 70 | ||
| SPG | 90 | 75 | ||
| SPG | 95 | 80 | ||
| SPG | 100 | 85 | ||
| SPG | 105 | 90 |
| 名称 | D | d | h | H |
| SPG | 108 | 92 | 7.3 | 7.5 |
| SPG | 110 | 94 | ||
| SPG | 112 | 96 | ||
| SPG | 115 | 99 | ||
| SPG | 120 | 104 | ||
| SPG | 125 | 109 | ||
| SPG | 130 | 114 | ||
| SPG | 135 | 119 | ||
| SPG | 140 | 124 | ||
| SPG | 145 | 129 | ||
| SPG | 150 | 134 | ||
| SPG | 155 | 139 | ||
| SPG | 160 | 144 | ||
| SPG | 170 | 148 | 10.8 | 11 |
| SPG | 175 | 153 | ||
| SPG | 180 | 158 | ||
| SPG | 190 | 168 | ||
| SPG | 200 | 178 | ||
| SPG | 220 | 198 | ||
| SPG | 225 | 203 | ||
| SPG | 270 | 248 |
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