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KASTAS缓冲圈K53是一种气动缓冲密封圈，带有特殊设计的垫片和流动通道，用于在气缸中的行程末端缓冲。易于安装，由于流动通道和自动定心，可靠的阻尼，能够在恶劣条件下工作。在安装之前，密封元件必须用系统油涂上油。
| 订货号 | NBR | PU | d(h10) | D(H11) | D1(H11) | D2(H11) | d1(f8) | b1 | b2 | B(±0.1) | B1(±0.2) |
| K53-008 | NBR | 8 | 11.6 | 8.5 | 10 | 4 | 3.5 | 2.8 | 3.3 | 5.3 | |
| K53-009 | NBR | 9 | 14 | 9.5 | 11 | 5 | 5 | 4.1 | 4.8 | 6.8 | |
| K53-009.5 | NBR | 9.5 | 15 | 10 | 12 | 5.5 | 4.6 | 3.7 | 4.5 | 6.5 | |
| K53-012 | NBR | PU | 12 | 18 | 13 | 15.5 | 8 | 5 | 4.1 | 4.8 | 6.8 |
| K53-012/1 | NBR | PU | 12 | 20 | 13 | 17 | 8 | 7.8 | 6.2 | 7 | 9 |
| K53-014 | NBR | PU | 14 | 22 | 15 | 19 | 10 | 7.8 | 6.2 | 7 | 9 |
| K53-016 | NBR | PU | 16 | 24 | 17 | 21 | 12 | 7.8 | 6.2 | 7 | 9 |
| K53-016/1 | NBR | PU | 16 | 22 | 17 | 19.5 | 12 | 5.5 | 4.7 | 5.2 | 7.2 |
| K53-018 | PU | 18 | 26 | 19 | 22 | 14 | 7.8 | 6.2 | 7 | 9 | |
| K53-020 | NBR | PU | 20 | 28 | 21 | 24 | 16 | 7.8 | 6.2 | 7 | 9 |
| K53-022 | NBR | 22 | 30 | 23 | 26 | 18 | 7.8 | 6.2 | 7 | 9 | |
| K53-024 | NBR | PU | 24 | 32 | 25 | 28 | 20 | 7.8 | 6.2 | 7 | 9 |
| K53-025 | NBR | PU | 25 | 33 | 26 | 29 | 21 | 7.8 | 6.2 | 7 | 9 |
| K53-025/1 | PU | 25 | 35 | 26 | 30 | 21 | 7.8 | 6.2 | 7 | 9 | |
| K53-028 | PU | 28 | 36 | 29 | 32 | 24 | 7.8 | 6.2 | 7 | 9 | |
| K53-030 | NBR | PU | 30 | 40 | 31.5 | 35 | 26 | 7.8 | 6.2 | 7 | 9 |
| K53-032 | NBR | PU | 32 | 40 | 33.5 | 37 | 28 | 7.8 | 6.2 | 7 | 9 |
| K53-032/1 | PU | 32 | 42 | 33 | 37 | 28 | 7.8 | 6.2 | 7 | 9 | |
| K53-036 | NBR | PU | 36 | 46 | 37.5 | 41 | 32 | 7.8 | 6.2 | 7 | 9 |
| K53-040 | NBR | PU | 40 | 50 | 41.5 | 45 | 32 | 7.8 | 6.2 | 7 | 9 |
| K53-050 | PU | 50 | 67 | 53 | 58 | 46 | 11 | 11 | 12.5 | 14.5 | |
| K53-050/1 | PU | 50 | 60 | 51.5 | 55 | 46 | 7.8 | 6.2 | 7 | 9 | |
| K53-057 | PU | 57 | 74 | 60 | 65 | 53 | 11 | 10 | 12.5 | 14.5 | |
| K53-070 | PU | 70 | 87 | 73 | 78 | 66 | 11 | 10 | 12.5 | 14.5 |