Fire Hose Coupling 1) Nominal diameter: 50mm 2) Working pressure: 1.6MPa Fire Hose Coupling Features: 1) Nominal diameter: 50mm 2) Working pressure: 1.6MPa Fire Hose Coupling , Couplings ,fire fighting Features:1) Nominal diameter: 50mm2) Working pressure: 1.6MPa3) Applicable media: water, foam4) Strength test pressure: 2.4MPaTYPE: German / American / Russian / BS Fire Coupling ...