I. Introduction to Early Suppression Fast Response (ESFR) Sprinkler K202 (Pendant Type):

The Early Suppression Fast Response (ESFR) sprinkler is a large-orifice sprinkler head, serving as a key component in automatic fire suppression systems. It functions both to detect fires and to extinguish them through automatic water discharge. In the early stages of a fire, it responds quickly to heat, automatically opening to distribute water with a specific impulse, shape, and density over the designed protection area. It is a fire-suppression sprinkler head designed for early fire control. Featuring a fast-response fusible alloy, a large orifice diameter, and an extensive deflector, its Response Time Index (RTI) is ≤28±8 (m·s)^0.5, providing 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. Main Technical Performance Parameters of Early Suppression Fast Response (ESFR) Sprinkler K202 (Pendant Type):

1. Installation Type: Pendant, deflector facing upward; Pendant, deflector facing downward.

2. Nominal Diameter: 20mm, Connection Thread R2 3/4.

3. Rated Working Pressure: 1.2MPa, Factory Seal Test Pressure: 3.4MPa. 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.

III. Storage, Installation, Usage, and Maintenance Precautions for Early Suppression Fast Response (ESFR) Sprinkler K202 (Pendant Type):

1. Sprinkler heads should be stored in a dry environment between -15°C and 40°C and must not be used in environments below 4°C.

2. When installing sprinklers, it is recommended to use polytetrafluoroethylene (PTFE) seal tape on threaded connections with pipe fittings. Pipe fittings should comply with national standards.

3. During installation, use the appropriate wrench socket provided by the manufacturer specifically for sprinkler heads, and ensure correct usage as illustrated below. The tightening torque for sprinklers is 10-20 N·m, and must not exceed 25 N·m. After installation, ensure they are neatly arranged to prevent damage from impact.

4. Sprinkler heads should be kept clean; painting or coating them with paint or other materials is strictly prohibited.

5. Sprinklers awaiting installation should be stored in the protective foam boxes provided by the manufacturer. Construction personnel must not use other containers, such as safety helmets or paint buckets, for storage or handling.

6. Handling sprinklers must be done gently; throwing, grabbing, or dumping is not allowed. The fusible alloy element must be protected from impact. The company is not responsible for leaks or accidental discharges caused by improper handling or installation that results in damage to the sprinkler frame, fusible alloy element, or support components.