Technical Requirement:
1. Design and Manufacture: BS5163;
2. Face to Face: BS5163;
3. Flange End: BS EN1092;
4 Test: BS5146
информация о продукте
Main parts and materials
| Parts Name | Materials |
| Body、Bonnet | ductile iron |
| Disc | ductile iron+ NBR/EPDM |
| Stem | Stainless steel |
| Seat Ring | NBR/EPDM |
