【美標(biāo)對(duì)夾式止回閥概述】
H71H(W)美標(biāo)對(duì)夾式止回閥由閥體、閥瓣、彈簧等組成,水平或垂直安裝于管路系統(tǒng),防止介質(zhì)倒流,具有結(jié)構(gòu)短、體積小、重量輕;
閥瓣關(guān)閉快速,水錘壓力;流道通暢,流體阻力;動(dòng)作靈敏,密封性能好。
【美標(biāo)對(duì)夾式止回閥結(jié)構(gòu)圖】
【美標(biāo)對(duì)夾式止回閥的型號(hào)、材料及主要參數(shù)】
配管法蘭 |
公稱壓力 |
常規(guī)產(chǎn)品型號(hào) |
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 |
|
閥體 |
WCB(A105) |
ZG1Cr18Ni9Ti |
CF8(304) |
CF3(304L) |
ZG1Cr18Ni12Mo2Ti |
CF8M(316) |
CF3M(316L) |
閥瓣 |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni9 |
00Cr19Ni10 |
1Cr18Ni12Mo2Ti |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
壓圈 |
2Cr13 |
1Cr18Ni9Ti |
0Cr18Ni9 |
00Cr19Ni10 |
1Cr18Ni12Mo2Ti |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
彈簧 |
0Cr18Ni9 |
0Cr18Ni9 |
0Cr18Ni9 |
00Cr19Ni10 |
0Cr17Ni12Mo2 |
0Cr17Ni12Mo2 |
00Cr17Ni14Mo2 |
|
適用介質(zhì) |
水、蒸汽、油品等 |
硝酸等腐蝕性介質(zhì) |
強(qiáng)氧化性介質(zhì) |
醋酸等腐蝕性介質(zhì) |
尿素等腐蝕性介質(zhì) |
適用溫度(℃) |
-29~425 |
-196~540 |
-196~425 |
-196~540 |
-196~455 |
注:本表為常規(guī)對(duì)夾式止回閥的型號(hào)編制、主要零件材料及適用工況,其他要求及其型號(hào)編制參見對(duì)夾止回閥型號(hào)編制方法。 |
【美標(biāo)對(duì)夾式止回閥主要連接尺寸】
壓力級(jí) |
口徑 |
尺寸(mm) |
|
配管法蘭(供參考) |
NPS |
DN |
L |
D |
D2 |
D3 |
D4 |
|
|
螺栓直徑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 |
壓力級(jí) |
口徑 |
尺寸(mm) |
|
配管法蘭(供參考) |
NPS |
DN |
L |
D |
D2 |
D3 |
D4 |
|
|
螺栓直徑d |
|
in |
mm |
RF |
RJ |
CLass 150PN 2.0MPa (長(zhǎng)系列) |
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 |
【美標(biāo)對(duì)夾式止回閥流體阻力系數(shù)、流量系數(shù)及開啟壓力】
水的當(dāng)量體積流量Vw與實(shí)際流體的體積流量V按下式換算:
式中:Vw-水的當(dāng)量體積流量,1/S; ρ-流體密度,kg/m3; V-實(shí)際流體的體積流量,1/S。
|
流體力學(xué)性能·H71美標(biāo)對(duì)夾式止回閥的流體阻力系數(shù)
公稱通徑 |
閥門全開啟 時(shí)的流體阻 力系數(shù)ξ |
常溫下閥門全開啟時(shí)的水流量系數(shù)
|
流體的流向
|
DN |
NPS |
Kv(m3/h) |
Cv(U.S) |
Cv(U.K)
|
↑ |
↓ |
→ |
開啟壓力近似值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 |
【美標(biāo)對(duì)夾式止回閥結(jié)構(gòu)特點(diǎn)】
1、結(jié)構(gòu)長(zhǎng)度短,其結(jié)構(gòu)長(zhǎng)度只有傳統(tǒng)法蘭止回閥的1/4~1/8
2、體積小、重量輕、其重量只有傳統(tǒng)法蘭止回閥的1/4~1/20
3、閥瓣關(guān)閉快速,水錘壓力小
4、水平管道使用,安裝方便
5、流道通暢、流體阻力小
6、動(dòng)作靈敏、密封性能好
7、閥瓣行程短、關(guān)閥沖擊力小
8、整體結(jié)構(gòu)、簡(jiǎn)單緊湊、造型美觀
9、使用壽命長(zhǎng)、可靠性高
|
訂貨須知:
一、①美標(biāo)對(duì)夾式止回閥產(chǎn)品名稱與型號(hào)②美標(biāo)對(duì)夾式止回閥口徑③美標(biāo)對(duì)夾式止回閥是否帶附件以便我們的為您正確選型。
二、若已經(jīng)由設(shè)計(jì)單位選定正鋼閥門美標(biāo)對(duì)夾式止回閥型號(hào),請(qǐng)按美標(biāo)對(duì)夾式止回閥型號(hào)直接向我司銷售部訂購(gòu)。
三、當(dāng)使用的場(chǎng)合非常重要或環(huán)境比較復(fù)雜時(shí),請(qǐng)您盡量提供設(shè)計(jì)圖紙和詳細(xì)參數(shù),由我們的正鋼閥門專家為您審核把關(guān)。