|
|
|
|
|
|
|
|
|
|
|
升降式止回阀利用流体压差和自身重力降,适用燃气管道控制接通和截断管路介质的启闭装置,阻止介质逆流。
|
|
|
|
|
|
|
|
|
阀体、阀盖 |
阀瓣 |
阀杆 |
密封面 |
碳钢 |
不锈钢 |
铬不锈钢 |
不锈钢与尼龙 |
|
|
|
|
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 |
|
|
|
|
|
|
公称压力PN |
2.5 |
4.0 |
MPa |
壳体试验压力PT |
3.72 |
6.0 |
高压密封试验压力 |
2.75 |
4.4 |
适用介质 |
液化气、天然气等 |
适用温度 |
-40~+80℃ |
连接法兰标准 |
JB/T 79-94 |
|
|
|
|
|
|
H42N-25/40止回阀
通径(DN):25~200(mm)
压力(PN):2.5,4.0MPa
|
|
|
|
|
|
|
|
|
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 |
|
|