| 概述 H76X/H(DDCV系列)型閥門主要由閥體、閥瓣（閥桿）及彈簧等結構組成， 由于閥瓣的關閉行短及彈簧作用可加強關閉效果．可減少水錘和水擊聲。 H46X/H是法蘭連接蝶型止回閥。這兩種閥門主要用于給水系統 ．高樓建筑及工業區，其結構長度較一般的止回閥短 ．對有安裝空間限制的場所便利。 | Overview H76X/H (DDCV Series)valves are mainly com-posed of body, disc(valve stem), spring and etc.The short closing stroke of disc and function of spring may strengthen closing effect and reduce the sound of water hammer and stamming. H46X/H are flange connection butterfly check valves. These two types of valves are mainly used in water sup-ply system, high-rises and industrial zones.Thanks to their shorter structural length compared with ordinary check valves, they are especially ap-plicable for space-restricted locations. |
主要零件材質Main Parts and Materials 零件名稱 Name 閥體、閥瓣 Valve Body、Disc 材料 Material 碳素鋼、不銹鋼、鉻鉬鋼、黃銅 Carbon steel，stainless steel，chromium Molybdenum steel，brass 閥桿 Valve Stem 不銹鋼 stainless steel 扭力彈簧 Torsion spring 不銹鋼 stainless steel 密封面 Seal surface 丁晴橡膠、不銹鋼、聚四氟乙烯、尼龍塑料 NBR，stainless steel are gathered Four Fluorine ethylene nylon plastics
主要性能參數Main Performace Parameters
| 型號 Type | 公稱壓力（MPa） Nominal Pressure | 試驗壓力Ps（MPa） Test Pressure PS | 工作溫度（℃）Working Temperature（℃） | 適用介質 Applicable Medium | ||
| 殼體Shell | 密封Seal | 軟密度Seal soflty | 硬密封Seal hard | |||
| H76X/H H46X/H | 1.0 | 1.5 | 1.1 | ≤80 | ≤200 | 水、油、水（蒸汽） 酸堿等介質 Oil，water（steam） Medium，such as Acid and alkali，etc.
|
| 1.6 | 2.4 | 1.8 | ||||
| 2.5 | 3.8 | 2.8 | ||||
| 4.0 | 6.0 | 4.4 | ||||
主要外形尺寸及連接尺寸Main External Dimensions and Connecting Dimensions
| D mm | L mm | L1 mm | D1 mm | D（mm） | |||
| PN10 | PN16 | PN25 | PN40 | ||||
| 40 | 33 | 106 | 55 | 92 | 92 | 92 | 92 |
| 50 | 43 | 108 | 65 | 107 | 107 | 109 | 109 |
| 65 | 46 | 112 | 80 | 127 | 127 | 129 | 129 |
| 80 | 64 | 114 | 95 | 142 | 142 | 144 | 144 |
| 100 | 64 | 127 | 110 | 162 | 162 | 170 | 170 |
| 125 | 70 | 140 | 141 | 192 | 192 | 198 | 198 |
| 150 | 76 | 140 | 168 | 217 | 217 | 228 | 228 |
| 200 | 89 | 152 | 219 | 272 | 272 | 288 | 293 |
| 250 | 114 | 165 | 273 | 325 | 325 | 343 | 355 |
| 300 | 114 | 178 | 324 | 377 | 377 | 403 | 420 |
| 350 | 127 | 190 | 356 | 437 | 437 | 460 | 480 |
| 400 | 140 | 216 | 418 | 490 | 490 | 520 | 549 |
| 450 | 152 | 222 | 467 | 540 | 540 | - | - |
| 500 | 152 | 229 | 526 | 595 | 595 | - | - |
| 600 | 178 | 267 | 626 | 690 | 690 | - | - |
| 700 | 229 | 292 | 725 | 800 | 800 | - | - |
| 800 | 241 | 318 | 820 | 905 | 905 | - | - |
| 900 | 241 | 330 | 920 | 1005 | 1005 | - | - |
| 1000 | 300 | 410 | 1025 | 1115 | 1115 | - | - |
注：法蘭連接尺寸按JB/T78-1994、JB/T79-1994
Note：the flange connects size and presses JB/T78-1994、JB/T79-1994
