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GB/T 597 船用外螺纹青铜止回阀基本参数：
| Type | Nominal pressure PN/MPa | Nominal diameter DN/mm | Applicable media | ||||||||||||
| A B | 4.0 | 10～32 | Seawater, fuel oil, lubricating oil, fresh water, air and steam with a temperature not exceeding 250℃ | ||||||||||||
主要零件材质：
| Part Name | Material | ||||||||||||||
| name | Brand | standard encdoing | |||||||||||||
| Valve body | Cast Aluminum Bronze | ZQAI9-2Ⅱ | CB 883-78 | ||||||||||||
| Valve cover, valve disc | Aluminum Bronze | ZQAI9-2 | YB 458-71 | ||||||||||||
A、B型截止阀结构及基本尺寸：
| Nominal diameter DN/ mm | structure size | Threaded joints | Wrench size/S2 | journey/m≈ | Theoretical weight/kg | |||||||||||||
| L | H≈ | H1 | D | D1 | D2 | L | L1 | A | B | |||||||||
| A | B | A | B | A | B | |||||||||||||
| 10 | 94 | 47 | 54 | 20 | 41 | M27*1.5 | 24.80 | 14 | 16 | 3 | 27 | 32 | 7 | 0.61 | 0.58 | |||
| 15 | 110 | 55 | 61 | 25 | 52 | M36*2 | 33 | 22 | 22 | 5 | 32 | 41 | 10 | 1.00 | 0.94 | |||
| 20 | 116 | 58 | 65 | 32 | 55 | M39*2 | 36 | 25 | 23 | 36 | 46 | 12 | 1.19 | 1.24 | ||||
| 25 | 130 | 65 | 70 | 38 | 64 | M48*2 | 45 | 32 | 26 | 6 | 46 | 50 | 14 | 1.71 | 1.58 | |||
| 32 | 140 | 70 | 84 | 46 | 72 | M56*2 | 53 | 38 | 28 | 60 | 16 | 2.87 | 2.61 | |||||
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