19. For high and medium pressure check valves with DN greater than 50mm and less than 600mm, swing check valves should be used;
20. For medium and low pressure check valves with DN greater than 200mm and less than 1200mm, wear-free spherical check valves should be used;
21. For low pressure check valves with DN greater than 50mm and less than 2000mm, butterfly check valves and diaphragm check valves should be used;
Material | Body | Ductile Iron,QT450 |
Screw | SS304 Stainless Steel | |
Gasket | NBR | |
End Connections | Flange × Flange | |
Flanges | ANSI150LB, BS 5404,GB Standard | |
Available Size | DN50 thru DN300 (3" thru 12") | |
Type | Flexible Disc | |
Working pressure | 16 bar | |
Color | Red/Blue | |
Media | Water | |
Hot Tags: flange end flexible disc check valve, China, manufacturers, suppliers, wholesale, price, Non Rising Stem Gate Valve, Butterfly Valves, Swing Type Check Valve, Signal Butterfly Valve, Fire Alarm Valve, Ductile Iron Flanged Silent Check Valve
1) Flange End:ANSI150LB/BS5404;
2) Screw Material:SS304 Stainless Steel;
3) Gasket Material:DUCTILE IRON;
4) Body Material:Ductile Iron,QT450;
5) Disc Material:Ductile Iron,QT450,COVERD BY NBR;
6) Surface Finishing:Epoxy Red or Blue.











