Early Suppression Fast Response ESFR Sprinkler K363 (UL Listed)

I. Introduction to Early Suppression Fast Response (ESFR) Sprinkler K363 (UL Certified):

The ESFR-363 Early Suppression Fast Response sprinkler is a large-flow, large-caliber sprinkler head. It serves as a key component in automatic fire sprinkler systems, primarily for fire detection and automatic suppression. The ESFR-363 sprinkler responds quickly and delivers more water to suppress fires, rather than merely controlling them like conventional sprinklers.

The ESFR-363 sprinkler is approved for use in protecting ordinary hazard occupancies, warehouses storing Class I-IV commodities, plastics, and mixed commodities, as well as other items specified by NFPA standards.

The ESFR-363 is typically used in wet pipe systems and is not permitted in dry pipe systems. When protecting valuable items, precision electronic equipment, computer rooms, or in environments with non-compliant temperature conditions, a pre-action system should be used. The ESFR-363 Early Suppression Fast Response sprinkler features high flow and rapid activation. Each sprinkler covers a maximum protection area of 9.3 m², with maximum storage heights ranging from 9.1 m to 12.2 m, and a maximum ceiling height of 13.7 m. The operating pressure range is 0.14 MPa to 0.34 MPa. Lower system operating pressure results in larger water droplet size and superior fire suppression performance.

One significant advantage of the ESFR-363 sprinkler is that it eliminates the need for in-rack sprinklers.

II. Main Technical Performance Parameters of Early Suppression Fast Response (ESFR) Sprinkler K363 (UL Certified)

1. Installation Type: Pendent, with deflector facing downward.

2. Nominal Diameter: 25 mm, Connection Thread: R1".

3. Maximum Rated Working Pressure: 1.2 MPa, Factory Seal Test Pressure: 3.4 MPa. 100% tested.

4. Flow Coefficient: K=363.

5. Response Time Index (RTI) ≤ 28 ± 8 (m·s)⁰·⁵.

6. Nominal Operating Temperature: 74°C, Ambient Temperature Range: 4°C to 40°C.

7. Maximum Coverage Area: 9.3 m².

8. Minimum Coverage Area: 7.4 m².