DXF(A)鋼球式單向閥是球形彈簧設計，金屬和金屬密封，鋼球周圍的直通型流道設計，使小直徑的閥體能輸出大流量，全部金屬設計，允許安裝和運行時的高溫。
DXF(A) is a spherical ball type check valve spring design,metal andmetal sealing,straight through flow design around the ball,the valvecan output large flow of small diameter,all metal design,installationand operation of the high temperature allowed.
| 主要零件材料 Meterials of Main Parts |
| 零部件名稱 Item | 材料牌號或名稱 Material |
| 閥門 Valve Seat | Hpb59-1 |
| 鋼管 Copper Tube | TP2 |
| 彈簧 Sping | 不銹鋼 Stainless steel |
| 鋼球 Steel Ball | 3Gr13 |
| I 技術參數 Specifications |
| 型號 | 最大工作壓力 Mpa | 耐壓 Mpa | 開啟壓 Mpa | 泄漏量cm3 /min | 流通量cc/min | 2psl 壓降的流量（冷卻） |
| types | Max WorkingPressure | Pressure Endurance | OPening Pressure | (Air)Leaking Capacity | Passing Capacity | Preddure Droy Capacity(tons) |
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| R-12 | R-22 | R-502 |
| DXF-6A | 4.5 | 21.5 | 0.02 | 500 | ≥750 | 3.8 | 5 | 3.3 |
| DXF-8A | 4.5 | 21.5 | 0.02 | 500 | ≥750 | 6.8 | 9 | 6 |
| DXF-10A | 4.5 | 21.5 | 0.05 | 500 | ≥950 | 12.8 | 17 | 11.3 |
| DXF-14A | 4.5 | 21.5 | 0.05 | 500 | ≥1250 | 26.3 | 35 | 23.5 |
| DXF-18A | 4.5 | 21.5 | 0.065 | 800 | ≥1650 | 69.1 | 92 | 61.8 |
| I 主要外形尺寸 Dimensions |
| 型號 | 接口內徑A | 閥體直徑B | 長度L |
| Type | Inner Dimeter of Connection | Dimeter of Valve Body | Length(l) |
| lnch | mm | lnch | mm | lnch | mm |
| DXF-6A | 3/8 | 9.7 | 1/2 | 12 | 4.7 | 120 |
| DXF-8A | 1/2 | 12.8 | 5/8 | 15.88 | 3.7 | 95 |
| DXF-10A | 5/8 | 16.1 | 7/8 | 22 | 4.5 | 115 |
| DXF-14A | 7/8 | 22.3 | 1-1/8 | 28.6 | 4.5 | 115 |
| DXF-18A | 1-1/8 | 28.6 | 1-3/8 | 35 | 5 | 127
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