DN15-72 Upright ESFR Fusible Alloy Firefighting Water Sprinkler Head

1. Each Upright Fusible Alloy Spary Sprinkler should be marked with Model Specifications, Manufacturer's Name (code number) or Trademark / Logo, Production Year (for example 2020 or 2021 or 2022 or ...), Certification Mark (if certified), on its splash plate or body, all markings shall be permanent and the markings shall be correct and clear, please see pictures or contact us to get exact vedio / samples. 

2. DN15-72 Degree Upright Water Spray Fusible Alloy Sprinklers have undergone water-wash resistance, mechanical shock resistance, low temperature resistance, high temperature resistance, ammonia stress corrosion resistance, sulfur dioxide corrosion resistance, salt spray corrosion resistance, and moisture resistance. Gas corrosion performance, environmental temperature resistance performance, anti-collision performance, anti-vacuum performance, the sprinkler nozzle body has not been seriously deformed or damaged.

3. Flow coefficient: For each DN15-72 Degree Upright Fusible Alloy Water Spray Fire Sprinklers Heads with nominal diameter 15mm, the flow coefficient K should be 80±4.

4. The outer surface of the sprinkler head nozzle should be uniform, without obvious bumps and deformation, and the surface coating and plating should be perfect and beautiful. 

5. The strength of the splash pan:  under 1.2 MPa water pressure, Sprinkle water continuously for 15 minutes, the splash pan will not be loose, fall off, permanent deformation or damage.