Early Suppression Fast Response (ESFR) Sprinkler with Fusible Alloy Fire Sprinkler Head

• Customization: Available
• Sprinkler Installation: Pendent
• Sprinkler Head Type: Open
• Model NO.: ESFR K11
• Alarm Valve Type: Wet Alarm Valve
• Automatically Opened and Closed Repeatedly: Can Automatically Opened and Closed
• Open Fire Sprinkler System Type: Water Spray System
• Closed Fire Sprinkler System: Preaction Fire Sprinkler System
• Dry Alarm Valve Type: Differential Type
• Wet Alarm Valve Structure: Butterfly Valve Type
• Transport Package: Carton
• Specification: 39.5*39.5*46cm
• Trademark: welfare
• Origin: Zhejiang, China (Mainland)

Product Description

Application	Upright ESFR (Early Suppression Fast Response) glass bulb sprinklers are large-orifice sprinklers that serve as a key component in automatic fire suppression systems.
	They function as both fire detectors and automatic water spray extinguishers. Featuring a 3mm glass bulb, large nozzle diameter, and oversized deflector, these sprinklers have a Response Time Index (RTI) ≤28±8 (m·s), enabling fast fire response, high flow rates, large water droplets, and superior fire suppression efficiency. Specifically designed for high-pile and high-rack storage, they outperform conventional sprinklers. Suitable for protecting Ordinary Hazard Group 1-IV commodities, plastic goods, and mixed storage warehouses.
Technical Parameters	1. Installation Type: Upright (deflector up) or Pendant (deflector down) 2. Nominal Diameter: 25mm  Thread Connection: R3/4  3.Rated Working Pressure: 1.2MPa Factory Seal Test Pressure: 3.4MPa (100% tested)  4. Flow Coefficient: K=202, K=242, K=363  5.Response Time Index (RTI): ≤28±8 (m·s) 6. Nominal Activation Temperature: 68°C  7. Maximum Coverage Area: 9.3m²