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Senju Fire Sprinkler 5.6K Concealed Pendent QR 205F | SS9521

Senju CN-QR Quick Response Concealed Pendent Fire Sprinkler activates at 205F (96C) to defend intermediate hazard commercial occupancies against fire. This UL-listed fire sprinkler features a 5.6K orifice and a 1/2" (12.7 mm) NPT connection.
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Part NumberConstructionConnectionOrifice
SS9521CP205 Copper Alloy Body And A Bronze Frame 1/2" (12.7 mm) NPT 5.6K
Temperature RatingSprinkler WrenchCover Plate Activation TemperatureCover Plate Finish
205F (96C) Wrench - Senju Socket Wrench for CN Fire Sprinklers 140F (60C) Choice of White, Nickel Mirror, Nickel Hairline (Brushed), Ivory, Beige, Black
Maximum Working PressureAvailabilityApprovals and Listings
175 PSI (12.1 BAR) Usually ships within 48 hours cULus Listed as Quick Response


Product Description

Senju CN-QR Quick Response Concealed Pendent Fire Sprinkler delivers decorative, competitively-priced defense against fire in intermediate hazard commercial occupancies such as hotel lobbies, office buildings, churches, and restaurants. Using a heat-activated soldered fusible link assembly, this automatic fire sprinkler opens when ambient temperatures reach 205F (96C), reducing the likelihood of flashover and facilitating safe evacuation.

Low-profile cover plates mount flush to the ceiling and are available in a factory-finished white, brushed chrome, grey white, ivory, beige, terra brown, jet black, or brushed brass. When temperatures near the ceiling reach 139F (59C), the soldered cover plate detaches, exposing the head of the Senju CN-QR concealed pendent fire sprinkler, which activates when temperatures reach 205F (96C).

The Senju Model CN-QR has a 5.6 K-Factor and installs with 1/2" (12.7 mm) National Pipe Thread (NPT), used in fire sprinkler systems throughout the United States. This Quick Response Fire Sprinkler features a copper alloy body, a phosphor bronze deflector, and a bronze frame providing 3/8" (9.53 mm) vertical adjustment for easy installation.

To order the Senju CN-QR with custom cover plates, contact us at 888.361.6662 or fill our our contact form.


With a maximum working pressure of 175 PSI (12.1 BAR), this pendent sprinkler hangs from above-ceiling piping behind a decorative cover plate and may be installed and used in accordance with NFPA 13 and local fire code. Each Model CN-QR sprinkler is made by Senju, Japan's largest manufacturer of fire-suppression products.

This product is UL-listed, and appropriate for use in fire protection systems when accepted by the authority having jurisdiction.


Technical Documents

Click here to view the data sheet for the Senju CN-QR Quick Response Concealed Pendent Fire Sprinkler.

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