... semi-axle structurewith high strength, high flowcapacity and small resistance.Expansion valve flange end asoptional,can flex freely or befixed as rigidity ... theworking condition.StyleClass: PN0.25MPa ~ 4.0MPaSize: DN100 ~ DN3600End Connection: Flange,WaferTemperature: -10°C ~ 80°CMaterial: Nodular cast iron,Carbon steel