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Tyco Fire Sprinkler 5.6K RFII Concealed Pendent QR 155F | TY3531 | 51-792-1-155

Tyco TY3531 Quick Response Concealed Pendent Fire Sprinkler activates at 155F (68C) to defend ordinary 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
TY3531CP155Bronze Frame And Bronze Deflector1/2" (12.7 mm) NPT5.6K
Temperature RatingAvailabilityCover Plate Activation TemperatureCover Plate Finish
155F (68C)Usually ships within 48 hours139F (59C)Choice of White, Polished Chrome, Brushed Chrome, or Black
Maximum Working PressureSprinkler Wrench
175 PSI FM or 250 PSI UL (12.1 BAR FM or 17.3 BAR UL)Socket Wrench - Tyco RFII

Product Description

Tyco TY3531 Quick Response Concealed Pendent Fire Sprinkler delivers decorative, competitively-priced defense against fire in ordinary hazard commercial occupancies such as hotel lobbies, office buildings, churches, and restaurants. Using a heat-activated 3mm glass bulb, this automatic fire sprinkler opens when ambient temperatures reach 155F (68C), reducing the likelihood of flashover and facilitating safe evacuation.

Choose from a factory-finished white cover plate, brushed chrome cover plate, polished chrome cover plate, or painted black cover plate that mounts flush to the ceiling for minimal visual impact. When temperatures near the ceiling reach 139F (59C), the soldered cover plate detaches, exposing the head of the Tyco TY3531 concealed pendent fire sprinkler, which activates when temperatures reach 155F (68C).

The Tyco Model TY3531 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 bronze frame, bronze deflector, and a beryllium-nickel seating assembly with PTFE.

This 155F (68C) temperature rating strikes a balance between a fire sprinkler that activates too soon, causing accidental discharge, and too late. 155F (68C) Quick Response Fire Sprinklers are preferred for use in theaters, auditoriums, and other gathering spaces where human safety is the first priority but a low profile is desirable. The Tyco Model TY3531 is often found in churches, hospitals, care facilities, museums, dental offices, and legal offices.

With a maximum working pressure of 175 PSI FM or 250 PSI UL (12.1 BAR FM or 17.3 BAR UL), this pendent sprinkler hangs from above-ceiling piping behind a decorative cover plate. Pendent sprinklers direct the water stream downward against the deflector to distribute water in a circular or conical discharge pattern. and may be installed and used in accordance with NFPA 13 and local fire code. Each Model TY3531 sprinkler is made by Tyco, a global manufacturer with more than a half-century in the fire protection industry.

This product is UL-listed, and appropriate for use in fire protection systems when accepted by the authority having jurisdiction. In accordance with NFPA 13, a higher temperature rating may be required when installing a quick response fire sprinkler in or near heat sources, unventilated spaces, uncovered steam mains, or uninsulated rooftops. Concealed pendent sprinklers should not b

Technical Documents

Click here to view the data sheet for the Tyco TY3531 Quick Response Concealed Pendent Fire Sprinkler.

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