I. Introduction to Early Suppression Fast Response (ESFR) Sprinkler K202 (Glass Bulb Downward Spray):

The Early Suppression Fast Response (ESFR) sprinkler is a large-orifice sprinkler head, serving as a key component of automatic fire suppression systems. It functions both in fire detection and automatic water discharge for extinguishment. During the initial stage of a fire, it thermally activates rapidly and distributes water with specific impulse, shape, and density over the designed protection area. It is a fire-suppression sprinkler designed for early fire control. Featuring a fast-response fusible alloy, large orifice diameter, and sizable 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. Parameters of Early Suppression Fast Response (ESFR) Sprinkler K202 (Glass Bulb Downward Spray):

1. Installation Type: Upright (deflector upward); Pendant (deflector 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. Precautions for Early Suppression Fast Response (ESFR) Sprinkler K202 (Glass Bulb Downward Spray):

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

2. During installation, it is recommended to use polytetrafluoroethylene (PTFE) seal tape on threaded connections, and fittings should comply with national standards.

3. Installation must be performed using the appropriate wrench socket provided by the manufacturer, as illustrated below. The tightening torque should be 10-20 N·m and must not exceed 25 N·m. After installation, ensure proper alignment and avoid impacts that could damage the sprinkler.

4. Keep sprinklers clean; painting or coating with油漆,涂料, etc., 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 of sprinklers must be done gently; throwing, grabbing, or pouring 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, or support components.