【美标对夹式止回阀概述】
H71H(W)美标对夹式止回阀由阀体、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，具有结构短、体积小、重量轻；
阀瓣关闭快速，水锤压力小；流道通畅，流体阻力小；动作灵敏，密封性能好。
【美标对夹式止回阀结构图】
【美标对夹式止回阀的型号、材料及主要参数】
|
配管法兰 |
公称压力 |
常规产品型号 |
JB/T 74
~90、
GB/T 9112
~9124、
HG 20592
~20614 |
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 |
GB/T 9112
~9124、
HG 20615
~20635、
SH 3406 |
PN2.0MPa |
H71H-20C |
— |
H71W-20P8 |
H71W-20P3 |
— |
H71W-20R8 |
H71W-20R3 |
|
PN5.0MPa |
H71H-50 |
— |
H71W-50P8 |
H71W-50P3 |
— |
H71W-50R8 |
H71W-50R3 |
|
PN11.0MPa |
H71H-110 |
— |
H71W-110P8 |
H71W-110P3 |
— |
H71W-110R8 |
H71W-110R3 |
|
PN15.0MPa |
H71H-150 |
— |
H71W-150P8 |
H71W-150P3 |
— |
H71W-150R8 |
H71W-150R3 |
|
ANSI B 16.5 |
Class150 |
H71H-A1C |
— |
H71W-A1P8 |
H71W-A1P3 |
— |
H71W-A1R8 |
H71W-A1R3 |
|
Class300 |
H71H-A3 |
— |
H71W-A3P8 |
H71W-A3P3 |
— |
H71W-A3R8 |
H71W-A3R3 |
|
Class600 |
H71H-A6 |
— |
H71W-A6P8 |
H71W-A6P3 |
— |
H71W-A6R8 |
H71W-A6R3 |
|
Class900 |
H71H-A9 |
— |
H71W-A9P8 |
H71W-A9P3 |
— |
H71W-A9R8 |
H71W-A9R3 |
|
|
阀体 |
WCB(A105) |
ZG1Cr18Ni9Ti |
CF8(304) |
CF3(304L) |
ZG1Cr18Ni12Mo2Ti |
CF8M(316) |
CF3M(316L) |
|
阀瓣 |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni9 |
00Cr19Ni10 |
1Cr18Ni12Mo2Ti |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
|
压圈 |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni9 |
00Cr19Ni10 |
1Cr18Ni12Mo2Ti |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
|
弹簧 |
0Cr18Ni9 |
0Cr18Ni9 |
0Cr18Ni9 |
00Cr19Ni10 |
0Cr17Ni12Mo2 |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
|
|
适用介质 |
水、蒸汽、油品等 |
硝酸等腐蚀性介质 |
强氧化性介质 |
醋酸等腐蚀性介质 |
尿素等腐蚀性介质 |
|
适用温度(℃) |
-29~425 |
-196~540 |
-196~425 |
-196~540 |
-196~455 |
|
注：本表为常规对夹式止回阀的型号编制、主要零件材料及适用工况，其他要求及其型号编制参见对夹止回阀型号编制方法。 |
【美标对夹式止回阀主要连接尺寸】
|
压力级 |
口径 |
尺寸(mm) |
|
配管法兰(供参考) |
|
NPS |
DN |
L |
D |
D2 |
D3 |
D4 |
|
|
螺栓直径d |
|
|
in |
mm |
|
|
1/2 |
15 |
16 |
46 |
15 |
25 |
25 |
0.28 |
60.5 |
4 |
1/2 |
M14 |
75 |
|
3/4 |
20 |
19 |
56 |
19 |
30 |
30 |
0.42 |
70 |
4 |
1/2 |
M14 |
90 |
|
1 |
25 |
22 |
65 |
24 |
36 |
36 |
0.56 |
79.5 |
4 |
1/2 |
M14 |
90 |
|
11/4 |
32 |
28 |
74 |
31 |
43 |
43 |
0.75 |
89 |
4 |
1/2 |
M14 |
100 |
|
11/2 |
40 |
31.5 |
84 |
39 |
52 |
52 |
1.3 |
98.5 |
4 |
1/2 |
M14 |
105 |
|
2 |
50 |
40 |
103 |
48 |
62 |
62 |
2.1 |
120.5 |
4 |
5/8 |
M16 |
125 |
|
21/2 |
65 |
46 |
122 |
62 |
75 |
75 |
2.8 |
139.5 |
4 |
5/8 |
M16 |
130 |
|
3 |
80 |
50 |
135 |
76 |
90 |
90 |
3.6 |
152.5 |
4 |
5/8 |
M16 |
135 |
|
4 |
100 |
60 |
173 |
95 |
112 |
112 |
4.8 |
190.5 |
8 |
5/8 |
M16 |
150 |
|
5 |
125 |
90 |
195 |
110 |
125 |
132 |
12 |
216.0 |
8 |
3/4 |
M20 |
180 |
|
6 |
150 |
106 |
220 |
127 |
150 |
158 |
17 |
241.5 |
8 |
3/4 |
M20 |
210 |
|
8 |
200 |
140 |
277 |
165 |
200 |
208 |
29 |
298.5 |
8 |
3/4 |
M20 |
240 |
|
压力级 |
口径 |
尺寸(mm) |
|
配管法兰(供参考) |
|
NPS |
DN |
L |
D |
D2 |
D3 |
D4 |
|
|
螺栓直径d |
|
|
in |
mm |
RF |
RJ |
|
|
1/2 |
15 |
25 |
46 |
15 |
25 |
25 |
0.28 |
60.5 |
4 |
1/2 |
M14 |
90 |
— |
|
3/4 |
20 |
31.5 |
56 |
19 |
30 |
30 |
0.42 |
70 |
4 |
1/2 |
M14 |
100 |
— |
|
1 |
25 |
35.5 |
65 |
24 |
36 |
36 |
0.56 |
79.5 |
4 |
1/2 |
M14 |
105 |
120 |
|
11/4 |
32 |
40 |
74 |
31 |
43 |
43 |
0.75 |
89 |
4 |
1/2 |
M14 |
115 |
130 |
|
11/2 |
40 |
45 |
84 |
39 |
52 |
52 |
1.3 |
98.5 |
4 |
1/2 |
M14 |
120 |
135 |
|
2 |
50 |
56 |
103 |
48 |
62 |
62 |
2.1 |
120.5 |
4 |
5/8 |
M16 |
140 |
155 |
|
21/2 |
65 |
63 |
122 |
62 |
75 |
75 |
2.8 |
139.5 |
4 |
5/8 |
M16 |
155 |
170 |
|
3 |
80 |
71 |
135 |
76 |
90 |
90 |
3.6 |
152.5 |
4 |
5/8 |
M16 |
165 |
180 |
|
4 |
100 |
80 |
173 |
95 |
112 |
112 |
4.8 |
190.5 |
8 |
5/8 |
M16 |
175 |
190 |
|
5 |
125 |
110 |
195 |
110 |
125 |
132 |
12 |
216.0 |
8 |
3/4 |
M20 |
210 |
225 |
|
6 |
150 |
125 |
220 |
127 |
150 |
158 |
17 |
241.5 |
8 |
3/4 |
M20 |
230 |
245 |
|
8 |
200 |
160 |
277 |
165 |
200 |
208 |
29 |
298.5 |
8 |
3/4 |
M20 |
270 |
285 |
|
|
1/2 |
15 |
25 |
52 |
15 |
25 |
25 |
0.3 |
66.5 |
4 |
1/2 |
M14 |
95 |
105 |
|
3/4 |
20 |
31.5 |
65 |
19 |
30 |
30 |
0.46 |
82.5 |
4 |
5/8 |
M16 |
110 |
125 |
|
1 |
25 |
35.5 |
72 |
24 |
36 |
36 |
0.6 |
89 |
4 |
5/8 |
M16 |
115 |
130 |
|
11/4 |
32 |
40 |
81 |
31 |
43 |
43 |
0.8 |
98.5 |
4 |
5/8 |
M16 |
125 |
140 |
|
11/2 |
40 |
45 |
94 |
39 |
52 |
52 |
1.5 |
114.5 |
4 |
3/4 |
M20 |
140 |
155 |
|
2 |
50 |
56 |
110 |
48 |
62 |
62 |
2.4 |
127.0 |
8 |
5/8 |
M16 |
145 |
170 |
【美标对夹式止回阀流体阻力系数、流量系数及开启压力】
水的当量体积流量Vw与实际流体的体积流量V按下式换算：
式中：Vw－水的当量体积流量，1/S；
ρ－流体密度，kg/m3；
V－实际流体的体积流量，1/S。
|
|
流体力学性能·H71美标对夹式止回阀的流体阻力系数
|
公称通径 |
阀门全开启
时的流体阻
力系数ξ |
常温下阀门全开启时的水流量系数
|
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 |
25 |
|
20 |
3/4 |
5.1 |
6.4 |
7.5 |
6.3 |
3 |
2 |
2.5 |
|
25 |
1 |
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 |
34.5 |
28.9 |
3 |
2 |
2.5 |
|
50 |
2 |
3.5 |
54.6 |
63.9 |
53.5 |
3 |
2 |
2.5 |
|
65 |
21/2 |
3.5 |
85.4 |
99.9 |
83.7 |
3 |
2 |
2.5 |
|
80 |
3 |
3.2 |
128 |
150 |
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 |
【美标对夹式止回阀结构特点】
1、结构长度短，其结构长度只有传统法兰止回阀的1/4~1/8
2、体积小、重量轻、其重量只有传统法兰止回阀的1/4~1/20
3、阀瓣关闭快速，水锤压力小
4、水平管道使用，安装方便
5、流道通畅、流体阻力小
6、动作灵敏、密封性能好
7、阀瓣行程短、关阀冲击力小
8、整体结构、简单紧凑、造型美观
9、使用寿命长、可靠性高
|
订货须知：
一、①美标对夹式止回阀产品名称与型号②美标对夹式止回阀口径③美标对夹式止回阀是否带附件以便我们的为您正确选型。
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