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KASTAS气封K54(Z形气封)是一种双作用气动活塞密封圈，设计用于低轴向轴承座槽。安装简便，低摩擦，圆形密封几何形状和柔性中心部件具有良好的密封性，轴向高度低，主要用于短行程气缸和阀门。
| 订货号 | D(H11)*d(h9)*b | B(-0/+0.2) | d1(±0.1) |
| K54-012 | 12*7*2.2 | 2.5 | 11.6 |
| K54-016 | 16*9*2.2 | 2.5 | 13.6 |
| K54-020 | 20*13*2.2 | 2.5 | 19.6 |
| K54-025 | 25*18*2.2 | 2.5 | 24.6 |
| K54-028 | 28*19*2.7 | 3 | 27.6 |
| K54-030 | 30*21*2.7 | 3 | 29.6 |
| K54-032 | 32*23*2.7 | 3 | 31.6 |
| K54-035 | 35*26*2.7 | 3 | 34.5 |
| K54-040 | 40*31*2.7 | 3 | 39.5 |
| K54-040/1 | 40*27.5*3.2 | 3.5 | 39.5 |
| K54-045 | 45*36*2.7 | 3 | 44.5 |
| K54-050 | 50*41*2.7 | 3 | 49.5 |
| K54-060 | 60*44*3.7 | 4 | 59.5 |
| K54-060/1 | 60*48*3.1 | 3.4 | 59.5 |
| K54-063 | 63*51*3.7 | 4 | 62.5 |
| K54-070 | 70*58*3.7 | 4 | 69.5 |
| K54-080 | 80*68*3.7 | 4 | 79.5 |
| K54-100 | 100*88*3.7 | 4 | 99.4 |
| K54-125 | 125*110*4.7 | 5 | 124.4 |