对夹升降式止回阀
止回阀型号：H71
对夹升降式止回阀由阀体、阀瓣、弹簧等组成，水平或垂直安装于管路系统，防止介质倒流.
流体力学性能：H71对夹双瓣旋启式止回阀的流体阻力系数、流量系数及开启压力：
|
公称通径 |
阀门全开启时的流体阻力系数 |
常温下阀门全开启时的水讲E量系数 |
流体的流向 |
|
DN |
NPS |
Kv(m3=／h) |
CV(U.S) |
CV(U.K) |
↑ |
↓ |
→ |
|
开启压力近似值KPa |
|
15 |
1/2 |
6.4 |
2.6 |
3.0 |
2.5 |
3 |
2 |
2.5 |
|
20 |
3/4 |
5.1 |
6.4 |
7.5 |
6.3 |
3 |
2 |
2.5 |
|
25 |
4 |
4.1 |
12.6 |
14.8 |
12.3 |
3 |
2 |
2.5 |
|
32 |
11/4 |
4.1 |
19.7 |
23.1 |
19.3 |
3 |
2 |
2.5 |
|
40 |
11/2 |
3.8 |
29.5 |
63.9 |
28.9 |
3 |
2 |
2.5 |
|
50 |
2 |
3.5 |
54.6 |
99.9 |
63.5 |
3 |
2 |
2.5 |
|
65 |
21/2 |
3.5 |
85.4 |
150 |
83.7 |
3 |
2 |
2.5 |
|
80 |
3 |
3.2 |
128 |
286 |
125 |
3 |
2 |
2.5 |
|
100 |
4 |
2.8 |
244 |
286 |
249 |
3 |
2 |
2.5 |
|
125 |
5 |
2.9 |
375 |
439 |
368 |
3 |
1 |
2.2 |
|
150 |
6 |
3.1 |
522 |
611 |
512 |
3 |
1 |
2.2 |
|
200 |
8 |
3.2 |
915 |
1070 |
897 |
3 |
1 |
2.2 |
|
公称压女
PN
MPa |
公称通径
DN
mm |
尺寸(mm) |
重量
(Kg) |
配管法兰(供参考) |
|
L |
D |
D2 |
D3 |
D4 |
D5 |
螺栓孔中心
圆直径Dl |
螺栓
数量 |
螺栓直径d |
螺栓
长度Ll |
|
PN1.0MPa
PN1.6MPa |
15 |
16 |
52 |
15 |
24 |
31 |
40 |
0.12 |
65 |
4 |
M12 |
75 |
|
20 |
19 |
62 |
19 |
30 |
40 |
50 |
0.24 |
75 |
4 |
M12 |
90 |
|
25 |
22 |
70 |
24 |
36 |
47 |
58 |
0.34 |
85 |
4 |
M12 |
90 |
|
32 |
28 |
83 |
31 |
46 |
56 |
68 |
0.53 |
100 |
4 |
M16 |
100 |
|
40 |
31.5 |
93 |
39 |
55 |
66 |
78 |
0.80 |
110 |
4 |
M16 |
105 |
|
|
50 |
40 |
108 |
48 |
65 |
78 |
90 |
1.2 |
125 |
4 |
M16 |
125 |
|
|
65 |
46 |
128 |
62 |
80 |
95 |
110 |
1.8 |
145 |
4 |
M16 |
130 |
|
80 |
50 |
142 |
76 |
96 |
110 |
125 |
2.2 |
160 |
8 |
M16 |
135 |
|
100 |
65 |
162 |
95 |
115 |
135 |
150 |
3.4 |
180 |
8 |
M16 |
150 |
|
125 |
90 |
192 |
110 |
125 |
132 |
- |
9.0 |
210 |
8 |
M16 |
180 |
|
150 |
106 |
218 |
127 |
150 |
158 |
- |
14 |
240 |
8 |
M20 |
210 |
|
PN1.0MPa |
200 |
140 |
273 |
165 |
200 |
208 |
- |
24 |
295 |
8 |
M20 |
240 |
|
PN1.6MPa |
200 |
140 |
273 |
165 |
200 |
208 |
- |
24 |
295 |
12 |
M20 |
240 |
|
PN2.5MPa |
15 |
16 |
52 |
15 |
24 |
31 |
40 |
0.12 |
65 |
4 |
M12 |
80 |
|
20 |
19 |
62 |
19 |
30 |
40 |
50 |
0.24 |
75 |
4 |
M12 |
90 |
|
25 |
22 |
72 |
24 |
36 |
47 |
58 |
0.34 |
85 |
4 |
M12 |
90 |
|
32 |
28 |
83 |
31 |
46 |
56 |
68 |
0.53 |
100 |
4 |
M16 |
110 |
|
40 |
31.5 |
93 |
39 |
55 |
66 |
78 |
0.80 |
110 |
4 |
M16 |
115 |
|
50 |
40 |
108 |
48 |
65 |
78 |
90 |
1.2 |
125 |
4 |
M16 |
125 |
|
65 |
46 |
128 |
62 |
80 |
95 |
110 |
1.8 |
145 |
8 |
M16 |
135 |
|
80 |
50 |
142 |
76 |
96 |
110 |
128 |
2.2 |
160 |
8 |
M16 |
145 |
|
100 |
60 |
168 |
95 |
115 |
135 |
150 |
3.8 |
190 |
8 |
M20 |
160 |
|
125 |
90 |
194 |
110 |
125 |
132 |
- |
9.2 |
220 |
8 |
M24 |
205 |
|
150 |
106 |
224 |
127 |
150 |
158 |
- |
15 |
250 |
8 |
M24 |
225 |
|
200 |
140 |
284 |
165 |
200 |
208 |
- |
26 |
310 |
12 |
M24 |
260 |
|
PN4.0MPa |
15 |
16 |
52 |
15 |
24 |
31 |
40 |
0.12 |
65 |
4 |
M12 |
80 |
|
20 |
19 |
62 |
19 |
30 |
40 |
50 |
0.24 |
75 |
4 |
M12 |
90 |
|
25 |
22 |
72 |
24 |
36 |
47 |
58 |
0.34 |
85 |
4 |
M12 |
90 |
|
32 |
28 |
83 |
31 |
46 |
56 |
68 |
0.53 |
100 |
4 |
M16 |
110 |
|
40 |
31.5 |
93 |
39 |
55 |
66 |
78 |
0.80 |
110 |
4 |
M16 |
115 |
|
50 |
40 |
108 |
48 |
65 |
78 |
90 |
1.2 |
125 |
4 |
M16 |
125 |
|
65 |
46 |
128 |
62 |
80 |
95 |
110 |
1.8 |
145 |
8 |
M16 |
135 |
|
80 |
50 |
142 |
76 |
96 |
110 |
128 |
2.2 |
160 |
8 |
M16 |
145 |
|
100 |
60 |
168 |
,
95 |
115 |
135 |
150 |
3.8 |
190 |
8 |
M20 |
160 |
|
125 |
90 |
194 |
110 |
125 |
132 |
- |
9.2 |
220 |
8 |
M24 |
205 |
|
150 |
106 |
224 |
127 |
150 |
158 |
- |
15 |
250 |
8 |
M24 |
225 |
|
200 |
140 |
291 |
165 |
200 |
208 |
- |
28 |
320 |
12 |
M27 |
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