... Iron,Ducticle Iron, Cast Brass SIZE DN50-300 Swing Check Valve BS4090 DN50-300 Design and Manufacture conforms to BS4090Flange Drilled ... operation system.2.V-goal mainly produces Gate valve, globe valve, butterfly valve, check valve, fire valve, storm valve, air pipe head and each kind of ... ABS and also acquire certifications of several classification societies. Swing Check Valve BS4090 DN50-300