| Product name | Expansion Ring Coupling |
| Types | NST/NPSH/BAT thread |
| Material | Alum.（Anodized） /Stainless Steel/Brass/PP |
| Size/inch | DN25-DN65 1"-2.5" |
| Technology&Advantage | 1. Strong compressive ability 2. 100% leaking test 3. FM certification |
| Main Applications | Civil Engineering、Fire Fighting、Industrial、Petrochemical |
