结构特点：
内装、单端面、多弹簧或蝶形弹簧、非平衡型、任意旋向.
应用范围：
温度: -20~200 ℃
压力: ≤2.5Mpa
线速度 : ≤20m/sec
介质: 水. 油类. 酸类. 碱等中等以下腐蚀性介质
| 规格尺寸 | D | D1 | D2 | D3 | D4 | L | L1 |
| DLR/M7-20 | 20 | 35 | 29 | 35 | 3 | 26 | 19.5 |
| DLR/M7-25 | 25 | 40 | 34 | 40 | 3 | 28.5 | 19.5 |
| DLR/M7-30 | 30 | 45 | 39 | 45 | 3 | 31 | 19.5 |
| DLR/M7-35 | 35 | 50 | 44 | 50 | 3 | 31 | 19.5 |
| DLR/M7-40 | 40 | 57 | 51 | 58 | 4 | 31 | 22 |
| DLR/M7-45 | 45 | 62 | 56 | 63 | 4 | 31 | 22 |
| DLR/M7-50 | 50 | 67 | 62 | 70 | 4 | 32.5 | 23 |
| DLR/M7-55 | 55 | 72 | 67 | 75 | 4 | 32.5 | 23 |
| DLR/M7-60 | 60 | 81 | 72 | 80 | 4 | 37.5 | 23 |
| DLR/M7-65 | 65 | 86 | 77 | 85 | 4 | 37.5 | 23 |
| DLR/M7-70 | 70 | 91 | 83 | 92 | 4 | 42 | 26 |
| DLR/M7-75 | 75 | 99 | 88 | 97 | 4 | 42 | 26 |
| DLR/M7-80 | 80 | 104 | 95 | 105 | 4 | 41.8 | 26.2 |
| DLR/M7-85 | 85 | 109 | 100 | 110 | 4 | 41.8 | 26.2 |
| DLR/M7-90 | 90 | 114 | 105 | 115 | 4 | 46.8 | 26.2 |
| DLR/M7-95 | 95 | 119 | 110 | 120 | 4 | 47.8 | 25.2 |
| DLR/M7-100 | 100 | 124 | 115 | 125 | 4 | 47.8 | 25.2 |
| DLR/M7-105 | 105 | 138 | 122.2 | 134.3 | 5 | 47 | 30 |
| DLR/M7-110 | 110 | 143 | 128.2 | 140.3 | 5 | 47 | 30 |
| DLR/M7-115 | 115 | 148 | 136.2 | 148.3 | 5 | 47 | 30 |
| DLR/M7-120 | 120 | 153 | 138.2 | 150.3 | 5 | 47 | 30 |
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