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Threaded Swing Stainless Steel Check Valves are used to prevent backflow of media in the pipeline. Check valve belongs to automatic valve class, the opening and closing parts open or close by the force of the flowing medium. The check valve is only used for one-way flow of medium in the pipeline, to prevent backflow of medium, to prevent accidents. Applicable medium: water, oil, steam, acid medium, etc.
Standard：
|
Design and manufacture |
Structure length |
Pressure-temperature rating |
Connecting flange |
Test and inspection |
|
GB12236 |
GB12221 |
GB9131
|
JB/T74-94
|
JB/T9092-1999
|
Pressure testing：
|
Nominal Pressure
|
试验压力(MPa) |
Suitable temperature (℃) |
Suitable medium |
||||
|
Strength test |
Seal test |
WCB |
Cr5Mo |
1Cr18Ni12Mo2Ti |
1Cr18Ni9Ti |
||
|
1.6 |
2.4 |
1.8 |
≤425 |
≤550 |
≤220 |
≤200 |
Water, oil, steam, acid medium |
|
2.5 |
3.8 |
2.8 |
|||||
|
4.0 |
6.0 |
4.4 |
|||||
|
6.4 |
9.6 |
7.1 |
|||||
|
10.0 |
15.0 |
11.0 |
- |
||||
|
16.0 |
24.0 |
17.6 |
|||||
|
25.0 |
37.5 |
27.5 |
|||||
Main Part Materials and Property:
|
Name of Parts |
Material number |
|||
|
Body |
WCB |
ZGCr5Mo |
ZG1Cr18Ni9Ti |
ZG1Cr18Ni12Mo2Ti |
|
Bonnet |
WCB |
ZGCr5Mo |
ZG1Cr18Ni9Ti |
ZG1Cr18Ni12Mo2Ti |
|
Disc |
WCB |
ZGCr5Mo |
ZG1Cr18Ni9Ti |
ZG1Cr18Ni12Mo2Ti |
|
Rocker |
WCB |
ZGCr5Mo |
ZG1Cr18Ni9Ti |
ZG1Cr18Ni12Mo2Ti |
|
Valve seat |
25 |
1Cr18Ni9Ti |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
|
Pin |
1Cr17Ni2 |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
|
|
Sealing ring, gasket |
Metallic jacket gasket |
1Cr18Ni9Ti |
1Cr18Ni12Mo2Ti |
|
Main technical dimensions:
|
Nominal pressure
|
Nominal diameter
|
Main external dimensions and connection dimensions (mm) |
Weight
|
|||||||
|
L |
D |
D1 |
D2 |
b-f |
z-d |
D3 |
H |
|||
|
1.6 |
25 |
160 |
115 |
85 |
65 |
16-2 |
4--14 |
140 |
130 |
14 |
|
32 |
180 |
135 |
100 |
78 |
16-2 |
4--18 |
150 |
140 |
16 |
|
|
40 |
200 |
145 |
110 |
85 |
16-2 |
4--18 |
160 |
150 |
18 |
|
|
50 |
230 |
160 |
125 |
100 |
16-2 |
4--18 |
185 |
160 |
22 |
|
|
65 |
290 |
180 |
145 |
120 |
18-3 |
4--18 |
215 |
177 |
26 |
|
|
80 |
310 |
195 |
160 |
135 |
20-3 |
8-18 |
235 |
187 |
33 |
|
|
100 |
3540 |
215 |
180 |
155 |
20-3 |
8-18 |
255 |
202 |
39 |
|
|
125 |
400 |
245 |
210 |
185 |
22-3 |
8-18 |
285 |
227 |
57 |
|
|
150 |
480 |
280 |
240 |
210 |
24--3 |
8-23 |
330 |
263 |
80 |
|
|
200 |
550 |
335 |
295 |
265 |
26-3 |
12-23 |
385 |
293 |
95 |
|
|
250 |
650 |
405 |
355 |
320 |
30-3 |
12-25 |
455 |
330 |
175 |
|
|
300 |
750 |
460 |
410 |
375 |
30-4 |
12-25 |
515 |
382 |
260 |
|
|
350 |
850 |
520 |
470 |
435 |
34--3 |
16-25 |
545 |
430 |
360 |
|
|
400 |
950 |
580 |
525 |
485 |
36-4 |
16-30 |
600 |
480 |
496 |
|
|
500 |
1150 |
705 |
650 |
608 |
44--4 |
20-34 |
730 |
560 |
588 |
|
