WaStop double collar Technical specification Nominal diameter DN 450 (NPS 18) Max. Flow Velocity 3 m/s (9.8 fps) Weight 20 kg (44.1 lb) # Bolt holes (#B) 4 Bolt Circle Diameter (BCD) 585 mm (23 in) Dimension 443 mm (17.4 in) Valve body length (L) 560 mm (22 in) Outer Ø (OD) 443 mm (17.4 in) OD incl. gasket (ODG) 467 mm (18.4 in) Ø Bolt Holes (ØB) 10.5 mm (0.4 in) Max. Flow Volume 478 l/s (7576.5 GPM) Max. ID Host Pipe 464 mm (18.3 in) Min. ID Host Pipe 446 mm (17.6 in) Fasteners mtrl. 316L stainless steel Gasket EPDM Product sheet (PDF) Technical specification (PDF) Dimensional drawing (PDF)