Design Features:
Check Valves are the valves of stopping the fluid from backflow. The disc can be opened by the pressure of fluid. And then the fluid runs from the inlet to the outlet side. When the pressure of inlet is less than outlet, the disc can be cloased automatically and stop the fluid from backflow.
ZG Check Valve Features
1. Rational Structures, Reliable Sealing.The product structure is reasonable, the seal is reliable, and the performance is good.
2. Hard-alloy Seal, Long Life.The sealing surface is welded with hard alloy, which has good wear resistance and long service life.
Field of Application:
Size Range: 2"-18"/DN50-DN450
Temperature: （-）29℃ to 425℃
Allowable Operating Pressure:150LB/300LB/600LB
Check Valve for use inpetrochemical industry, Chemical,Fiber Textiles, plastic, paper making, power industry, steel, rubber and gas systems.
Performance Specifications:
| Nomial Pressure | 150LB | 300LB | 600LB |
| Shell Test | 3.0 Mpa | 7.5 Mpa | 15.0 Mpa |
| Seal Test | 2.2 Mpa | 5.5 Mpa | 11.0 Mpa |
| Back Seal Test | 2.2 Mpa | 5.5 Mpa | 11.0 Mpa |
| AIRPROOF | 0.6Mpa | 0.6Mpa | 0.6Mpa |
| Working Temperature | -29℃ ~ 425℃ |
| Medium | W.O.G |
Technical Specification:
1. Design Standard BS1868 - 1975
2. Face to Face Dimension ANSI B 16.10 - 2009
3. End Flange Dimension ANSI B 16.5 - 2009
4. Test Standard API 598 - 2009
MATERIAL LIST
| Item No. | Part Name | Specification |
| 1 | Body | WCB, CF8, CF8M |
| 2 | Seat | A105, F304, F316 |
| 3 | Disc | WCB+F6, CF8, CF8M |
| 4 | Nut | A194-2H, A194-8 |
| 5 | Pin | A182 F6a, F304 |
| 6 | Rocker | WCB, CF8, CF8M |
| 7 | Pin | A182 F6a, F304 |
| 8 | Rocker | WCB, CF8, CF8M |
| 4 | Nut | A194-2H, A194-8 |
| 10 | Bolt Nut | B7, B8, 2H, 8 |
| 11 | Bonnet | WCB, CF8, CF8M |
| 12 | Eye bolt | A29-1035 |
Dimensions (mm)
| DN |
150LB |
300LB |
600LB |
| L |
A |
B |
C |
b |
f |
N-Φ |
H |
L |
A |
B |
C |
b |
f |
N-Φ |
H |
L |
A |
B |
C |
b |
f |
N-Φ |
H |
| 50 |
203 |
152 |
120.5 |
92 |
16 |
1.6 |
4x19 |
135 |
216 |
165 |
127 |
92 |
22 |
1.6 |
8x19 |
158 |
292 |
165 |
127 |
92 |
26 |
6.4 |
8x19 |
197 |
| 65 |
216 |
178 |
139.5 |
105 |
17.5 |
1.6 |
4x19 |
155 |
241 |
191 |
149 |
105 |
25 |
1.6 |
8x22 |
167 |
330 |
191 |
149 |
105 |
29 |
6.4 |
8x22 |
207 |
| 80 |
241 |
190 |
152.5 |
127 |
19 |
1.6 |
4x19 |
168 |
283 |
210 |
168 |
127 |
29 |
1.6 |
8x22 |
188 |
356 |
210 |
168 |
127 |
32 |
6.4 |
8x22 |
231 |
| 100 |
292 |
229 |
190.5 |
157 |
24 |
1.6 |
8x19 |
235 |
305 |
254 |
200 |
157 |
32 |
1.6 |
8x22 |
259 |
432 |
273 |
216 |
157 |
38 |
6.4 |
8x25 |
281 |
| 125 |
330 |
254 |
215 |
186 |
25 |
1.6 |
8x22 |
235 |
381 |
279 |
235 |
186 |
35 |
1.6 |
8x22 |
281 |
/ |
330 |
266.5 |
186 |
45 |
6.4 |
8x30 |
319 |
| 150 |
356 |
279 |
241.5 |
216 |
26 |
1.6 |
8x22 |
277 |
403 |
318 |
270 |
216 |
37 |
1.6 |
12x22 |
319 |
559 |
356 |
292 |
216 |
48 |
6.4 |
12x29 |
362 |
| 200 |
495 |
343 |
298.5 |
270 |
29 |
1.6 |
8x22 |
339 |
419 |
381 |
330 |
270 |
41 |
1.6 |
12x25 |
401 |
660 |
419 |
349 |
270 |
56 |
6.4 |
12x32 |
437 |
| 250 |
622 |
406 |
362 |
324 |
31 |
1.6 |
12x25 |
398 |
457 |
445 |
387.5 |
324 |
48 |
1.6 |
16x29 |
483 |
787 |
508 |
432 |
324 |
64 |
6.4 |
16x35 |
490 |
| 300 |
698 |
483 |
432 |
381 |
32 |
1.6 |
12x25 |
525 |
502 |
521 |
451 |
381 |
51 |
1.6 |
16x32 |
555 |
838 |
559 |
489 |
381 |
67 |
6.4 |
20x35 |
528 |
| 350 |
787 |
533 |
476.5 |
413 |
35 |
1.6 |
12x29 |
553 |
762 |
584 |
514.5 |
413 |
54 |
1.6 |
20x32 |
585 |
889 |
603 |
527 |
413 |
70 |
6.4 |
20x38 |
572 |
| 400 |
864 |
597 |
539.5 |
470 |
37 |
1.6 |
16x29 |
584 |
838 |
648 |
571.5 |
470 |
57 |
1.6 |
20x35 |
615 |
991 |
686 |
603 |
470 |
77 |
6.4 |
20x41 |
660 |
| 450 |
978 |
635 |
578 |
533 |
40 |
1.6 |
16x32 |
688 |
914 |
711 |
628.5 |
533 |
60 |
1.6 |
24x35 |
643 |
1092 |
743 |
654 |
533 |
83 |
6.4 |
20x45 |
720 |
