产品详情
对夹式止回阀属于自控阀门,不需要借助外力来驱使开启和关闭等工作,它是靠介质本身的推动力来实行启闭,对夹式止回阀是通过阀瓣来控制的,阀瓣受到了介质受力时,阀瓣开启,如果介质逆流的时候,使得阀瓣与阀座受到了一反作用力,从而阀瓣与阀座接触,阀瓣关闭,避免了止回内的介质逆流。
对夹式止回阀:按结构划分,可分为升降式对夹式止回阀、旋启式对夹式止回阀和蝶式对夹式止回阀三种。升降式对夹式止回阀可分为立式和卧式两种。旋启式对夹式止回阀分为单瓣式、双瓣式和多瓣式三种。蝶式对夹式止回阀为直通式、以上几种对夹式止回阀在连接形式上可分为螺纹连接、法兰连接和焊接三种。在上面我们就可以看出各种对夹式止回阀有着不同的优势。我们在安装使用时,要在管线中尽量避免对夹式止回阀承受过大的重量。在大口径的对夹式止回阀上,必须有一个很好的支撑,这样使得管道不会受到压力的影响。
配管法兰 | 公称压力 | 常规产品型号 | ||||||
JB/T 74 | PN1.0MPa | H71H-10C | H71W-10P | H71W-10P8 | H71W-10P3 | H71W-10R | H71W-10R8 | H71W-10R3 |
PN1.6MPa | H71W-16C | H71W-16P | H71W-16P8 | H71W-16P3 | H71W-16R | H71W-16R8 | H71W-16R3 | |
PN2.5MPa | H71W-25 | H71W-25P | H71W-25P8 | H71W-25P3 | H71W-25R | H71W-25R8 | H71W-25R3 | |
PN4.0MPa | H71W-40 | H71W-40P | H71W-40P8 | H71W-40P3 | H71W-40R | H71W-40R8 | H71W-40R3 | |
PN6.3MPa | H71W-63 | H71W-63P | H71W-63P8 | H71W-63P3 | H71W-63R | H71W-63R8 | H71W-63R3 | |
PN10.0MPa | H71W-100 | H71W-100P | H71W-100P8 | H71W-100P3 | H71W-100R | H71W-100R8 | H71W-100R3 | |
PN16.0MPa | H71W-160 | H71W-160P | H71W-160P8 | H71W-160P3 | H71W-160R | H71W-160R8 | H71W-160R3 |
H71系列对夹式止回阀主要尺寸及重量
公称压力 | 公称通径 | 尺寸(mm) | 重量 | 配管法兰(供参考) | ||||||||
L | D | D3 | D2 | D4 | 螺栓孔 | 螺栓数量 | 螺栓直径d | 螺栓长度L1 | ||||
PN1.0 | 15 | 25 | 52 | 15 | 44 | 25 | 0.12 | 65 | 4 | M12 | 75 | |
20 | 31.5 | 62 | 19 | 52 | 30 | 0.24 | 75 | 4 | M12 | 90 | ||
25 | 35.5 | 72 | 24 | 60 | 36 | 0.34 | 85 | 4 | M12 | 90 | ||
32 | 38 | 83 | 31 | 72 | 43 | 0.53 | 100 | 4 | M16 | 100 | ||
40 | 40 | 93 | 39 | 74 | 52 | 0.80 | 110 | 4 | M16 | 105 | ||
50 | 44 | 107 | 48 | 98 | 62 | 1.2 | 125 | 4 | M16 | 125 | ||
65 | 62 | 124 | 63 | 117 | 75 | 2.2 | 145 | 4 | M16 | 130 | ||
80 | 65 | 138 | 78 | 128 | 90 | 3.1 | 160 | 8 | M16 | 135 | ||
100 | 68 | 164 | 98 | / | 112 | 5.7 | 180 | 8 | M16 | 150 | ||
125 | 86 | 188 | 123 | / | 132 | 10 | 210 | 8 | M16 | 180 | ||
150 | 100 | 219 | 148 | / | 158 | 14 | 240 | 8 | M20 | 210 | ||
| 200 | 110 | 270 | 198 | / | 208 | 24 | 295 | 8 | M20 | 240 | |
| 250 | 160 | 332 | 248 | / | 208 | 35 | 350 | 8 | M20 | 260 | |
PN2.5 | 15 | 25 | 52 | 15 | 44 | 25 | 0.12 | 65 | 4 | M12 | 80 | |
20 | 31.5 | 62 | 19 | 52 | 30 | 0.24 | 75 | 4 | M12 | 90 | ||
25 | 35.5 | 72 | 24 | 60 | 36 | 0.34 | 85 | 4 | M12 | 90 | ||
32 | 40 | 83 | 31 | 72 | 43 | 0.53 | 100 | 4 | M16 | 110 | ||
40 | 45 | 93 | 39 | 74 | 52 | 0.80 | 110 | 4 | M16 | 115 | ||
50 | 56 | 109 | 48 | 98 | 62 | 1.2 | 125 | 4 | M16 | 125 | ||
65 | 63 | 129 | 63 | 117 | 75 | 2.2 | 145 | 8 | M16 | 135 | ||
80 | 71 | 144 | 78 | 128 | 90 | 3.1 | 160 | 8 | M16 | 145 | ||
100 | 80 | 168 | 98 | / | 112 | 7.0 | 190 | 8 | M20 | 160 | ||
125 | 110 | 196 | 123 | / | 132 | 12 | 220 | 8 | M24 | 205 | ||
150 | 125 | 224 | 148 | / | 158 | 15 | 250 | 8 | M24 | 225 | ||
200 | 160 | 284 | 198 | / | 208 | 26 | 310 | 12 | M24 | 260 | ||
PN4.0 | 15 | / | 52 | 15 | 44 | 25 | 0.12 | 65 | 4 | M12 | 80 | |
20 | / | 62 | 19 | 52 | 30 | 0.24 | 75 | 4 | M12 | 90 | ||
25 | / | 72 | 24 | 60 | 36 | 0.34 | 85 | 4 | M12 | 90 | ||
32 | / | 83 | 31 | 72 | 43 | 0.53 | 100 | 4 | M16 | 110 | ||
40 | / | 93 | 39 | 74 | 52 | 0.80 | 110 | 4 | M16 | 115 | ||
50 | / | 109 | 48 | 98 | 62 | 1.2 | 125 | 4 | M16 | 125 | ||
65 | / | 129 | 62 | 117 | 75 | 2.2 | 145 | 8 | M16 | 135 | ||
80 | / | 144 | 76 | 128 | 90 | 3.1 | 160 | 8 | M16 | 145 | ||
100 | / | 168 | 95 | / | 112 | 9 | 190 | 8 | M20 | 160 | ||
125 | / | 196 | 110 | / | 132 | 14 | 220 | 8 | M24 | 205 | ||
150 | / | 224 | 127 | / | 158 | 18 | 250 | 8 | M24 | 225 | ||
200 | / | 291 | 165 | / | 208 | 28 | 320 | 12 | M27 | 275 |
对夹式止回阀选型
① 对夹式止回阀的型号
② 对夹式止回阀的口径
③ 对夹式止回阀的公称压力
④ 对夹式止回阀输送介质
⑤ 对夹式止回阀材质要求
对应的对夹式止回阀供应产品有:H71系列止回阀 H74系列止回阀 H76系列止回阀 H77系列止回阀
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