Sprinklers & Alarm Valves

ESFR Early Suppression Fast Response Sprinkler

ESFR (Early Suppression Fast Response) sprinklers deliver very high water discharge with fast thermal response, engineered to suppress or control severe fires in high-pile storage, warehouses and large industrial facilities. A large engineered deflector with a high flow coefficient and a 74°C glass bulb give the coverage and reaction speed required by NFPA 13 / GB 50084 for storage protection.

Key Features

High discharge rate (K-factor per NFPA 13) to knock down fast-growing storage fires
Fast-response operation with a 74°C glass bulb for early suppression
Large engineered deflector for wide, uniform water distribution under racking
Pendent and upright (PY / UY) orientations for rack and open-storage layouts
Durable forged brass construction, packed 50 pcs per box for project supply

Technical Specifications

Model Series: ESFR-202 / ESFR-242 / ESFR-363, ZSTX-161
Temperature Rating: 74°C (165°F)
Orientation: Pendent (PY) / Upright (UY)
Thread Connection: R1/2" / R3/4" NPT
Packing: 50 pcs / box
Application: High-Pile Storage, Warehouses, Industrial Facilities

Parts & Materials List

Body Frame: Forged Brass (H59)
Glass Bulb: 74°C Fast-Response Glass
Deflector: Stainless / Copper Alloy, High-Flow Pattern

Applications

Automatic sprinkler systems
Commercial and residential buildings
Industrial warehouses
High-hazard deluge and pre-action systems

Quality & Testing

Pressure and leakage testing per GB 5135 series; alarm sensitivity verified with flow switches and alarm gongs.

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Frequently Asked Questions

What makes an ESFR sprinkler different from a standard fire sprinkler?

ESFR (early suppression fast response) sprinklers are designed to throw a very large volume of water quickly to knock down fast-growing fires. They use a high K-factor and a fast-response 74°C bulb, and are sized for high-pile storage and warehouses where standard sprinklers are not sufficient.

What temperature rating does this ESFR use?

All the ESFR models in this range use a 74°C (165°F) fast-response glass bulb, the standard rating for storage and industrial environments.

Are the ESFR sprinklers available in pendent and upright orientations?

Yes. The series is offered in pendent (PY, hanging down) and upright (UY, facing up) orientations so it can be matched to open-spray storage layouts and rack environments.

What are ESFR sprinklers used for?

ESFR sprinklers protect high-pile storage, warehouses, distribution centers and large industrial facilities, and are the go-to head type where NFPA 13 / GB 50084 storage-protection criteria apply.