I. Introduction to Early Suppression Fast Response (ESFR) Sprinkler K202 (UL Certified):

The Early Suppression Fast Response (ESFR) sprinkler is a large-orifice sprinkler head, serving as a key component of automatic fire sprinkler systems. It functions both to detect fires and to extinguish them through automatic water discharge. In the early stages of a fire, it thermally activates quickly and automatically, distributing water with specific impulse, shape, and density over the designed protection area. It is a fire-suppression sprinkler head designed for early fire suppression. Featuring a fast-response fusible alloy, a large nozzle diameter, and an extensive deflector, its Response Time Index (RTI) is ≤28±8 (m·s)^0.5, offering advantages such as rapid fire response and high water flow rates. It is specifically engineered to combat high-hazard warehouse fires and is used to protect high-pile and high-rack storage facilities, as well as warehouses storing plastic products and mixed commodities.

II. Technical Performance Parameters of Early Suppression Fast Response (ESFR) Sprinkler K202 (UL Certified):

1. Installation type: Upright, with deflector facing upward; Pendant, with deflector facing downward.

2. Nominal diameter: 20 mm, connection thread R2 3/4.

3. Rated working pressure: 1.2 MPa, factory seal test pressure: 3.4 MPa. 100% tested.

4. Flow coefficient: K=202.

5. Response Time Index (RTI) ≤28±8 (m·s)^0.5;

6. Nominal operating temperature: 74°C.

7. Minimum coverage area: 7.4 m2.

8. Maximum coverage area: 9.3 m2.