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升降式止回閥利用流體壓差和自身重力降,適用燃?xì)夤艿揽刂平油ê徒財(cái)喙苈方橘|(zhì)的啟閉裝置,阻止介質(zhì)逆流。
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閥體、閥蓋 |
閥瓣 |
閥桿 |
密封面 |
碳鋼 |
不銹鋼 |
鉻不銹鋼 |
不銹鋼與尼龍 |
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PN |
DN |
L |
H |
D |
D1 |
D2 |
b |
f |
z-∮d |
2.5MPa
4.0MPa |
25 |
160 |
115 |
115 |
85 |
65 |
16 |
2 |
4-14 |
32 |
190 |
120 |
135 |
100 |
78 |
18 |
3 |
4-18 |
40 |
200 |
140 |
145 |
110 |
85 |
18 |
3 |
4-18 |
50 |
230 |
150 |
160 |
125 |
100 |
20 |
3 |
4-18 |
80 |
310 |
175 |
195 |
160 |
135 |
22 |
3 |
8-18 |
100 |
350 |
200 |
230 |
190 |
160 |
24 |
3 |
8-23 |
150 |
480 |
265 |
300 |
25 |
218 |
30 |
3 |
8-25 |
200 |
600 |
300 |
360 |
310 |
278 |
34 |
4 |
12-25 |
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公稱壓力PN |
2.5 |
4.0 |
MPa |
殼體試驗(yàn)壓力PT |
3.72 |
6.0 |
高壓密封試驗(yàn)壓力 |
2.75 |
4.4 |
適用介質(zhì) |
液化氣、天然氣等 |
適用溫度 |
-40~+80℃ |
連接法蘭標(biāo)準(zhǔn) |
JB/T 79-94 |
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H42N-25/40止回閥
通徑(DN):25~200(mm)
壓力(PN):2.5,4.0MPa
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PN |
DN |
H |
D |
D1 |
D2 |
b |
f |
z-∮d |
2.5MPa
4.0MPa |
25 |
115 |
115 |
85 |
65 |
16 |
2 |
4-14 |
32 |
120 |
135 |
100 |
78 |
18 |
3 |
4-18 |
40 |
130 |
145 |
110 |
85 |
18 |
3 |
4-18 |
50 |
140 |
160 |
125 |
100 |
20 |
3 |
4-18 |
65 |
160 |
180 |
145 |
120 |
22 |
3 |
8-18 |
80 |
185 |
195 |
160 |
135 |
22 |
3 |
8-18 |
100 |
210 |
230 |
190 |
160 |
24 |
3 |
8-23 |
150 |
300 |
300 |
25 |
218 |
30 |
3 |
8-25 |
200 |
380 |
360 |
310 |
278 |
34 |
4 |
12-25 |
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