4.52 [RD055] [K115 SSU Sprinkler 3mm] [FM, UL] - Brass LR.jpg

4.52 [RD055] [K115 SSU Sprinkler 3mm] [FM, UL] - Chrome LR.jpg

RD055 SSU Upright Quick Response Sprinkler

K factor	115 (8.0)
Standard Orifice Size	15mm
Standard Thread Size	½” NPT
Response	Quick Response
Bulb	3mm
Maximum Working Pressure	12.1 bar (175 psi)
Finish	Brass, chrome and white paint finish. Special RAL E2colours available on request
Approvals	FM, UL, LPCB, VdS, CE, UKCA, Gost

Temperature

Finish

Quantity

The Rapidrop model RD055 SSU are Quick Response frangible glass bulb automatic sprinklers. They are CE Marked, LPCB, VdS, FM approved, UL listed, standard orifice fire sprinklers for installation in fire sprinkler systems. Sprinklers produce a hemispherical water distribution pattern below the deflector. In a fire condition the heat causes the fluid in the glass bulb to expand which shatters the glass and releases the spring seal assembly. Water flows from the orifice onto the sprinkler deflector which diffuses the water into a uniform spray pattern which extinguishes or controls the fire.

Specifications

K factor	K115 (K8.0)
Standard Orifice Size	15mm (½”)
Thread Size	½” NPT, R½ (½” BSPT) available on special order
Max. Working Pressure	12 bar (175 psi)
Min. Operating Pressure	0.5 bar (7psi)
Factory Pressure Test	34 bar (500 psi)
Weight	79 g (2.8 oz)
Fitted with Bulb Protector	Remove after installing sprinkler

Operating Temperatures

Nominal Operating Temperature	Bulb Colour
57ºC (135ºF)	Orange
68ºC (155ºF)	Red
79ºC (175ºF)	Yellow
93ºC (200ºF)	Green
141ºC (286ºF)	Blue

RD055 Design Coverage

Spray Upright Sprinkler for installing only in upright position giving hemispherical discharge below the deflector with little or no water being discharged upwards. For sprinkler coverage area and placement refer to NFPA 13 standards or other installation rules for automatic sprinkler systems as required by the authority having jurisdiction. The following details are provided for information only.

Rapidrop RD055 Fire Sprinkler Head Rapidrop K115 Fire Sprinkler Design Coverage