A-12 Millennium Flush Pendent Sprinkler - GL4248

Automatic Sprinklers Millennium™ GL4248 Flush Pendent

Description and Operation

The Globe Millennium™ Residential Flush Pendent Sprinkler is a low profile, aesthetically pleasing, flush mounted sprinkler that utilizes a 2.5mm frangible glass ampule as the thermosensitive element.

The combination of the 2.5mm frangible glass ampule and specially designed deflector make the Millennium™ Residential Sprinkler the ultimate in life safety and fire control. The sprinklers have met the strict requirements of Underwriters Laboratories Inc. as described in the Standard for Residential Sprinklers for Fire Protection Service, UL 1626, and should be installed in accordance with the appropriate National Fire Protection Association Standard NFPA 13, 13D or 13R.

The heart of Globe's Millennium™ Sprinkler actuating assembly is a hermetically sealed frangible glass ampule that contains a precisely measured amount of fluid. When heat is absorbed, the liquid within the bulb expands increasing the internal pressure. At the prescribed temperature, when the internal pressure exceeds the strength of the glass ampule, the ampule ruptures. The levers that had been held in position by the bulb now collapse inward allowing the deflector and Teflon coated belleville washer seal to move downward to the full operated position. This results in water discharge that is distributed in an approved pattern.

Technical Data

Temperature Rating - 155°F (68°C)
Water Working Pressure Rating -
175 psi (12 Bars)
Factory tested hydrostatically to 500 psi (34 Bars)
Maximum low temperature glass bulb rating is
-67°F (-55°C)
Body - bronze
Deflector - bronze
Orifice Insert - brass
Splitter - brass
Belleville Spring - beryllium nickel
Teflon gasket - teflon

Drop pin - bronze
Lever arm - bronze
Load bar - bronze
Ceiling cover - brass
Load screw - stainless steel
Bulb - glass with alcohol based solution, 2.5mm size
Escutcheon - steel
Dust cover - nylon
Pin cover - nylon

Sprinkler Temperature Rating/Classification and Color Coding

Classification	Available Sprinkler Temperatures		Bulb Color	N.F.P.A. Maximum Ceiling Temperature
Ordinary	155°F	68°C	Red	100°F	38°C
Intermediate	175°F	79°C	Yellow	150°F	66°C

Specifications

Nominal 'K' Factor		Thread Size	Length	Finishes
4.1	(58 metric)	1/2" NPT	2 1/2" (6.4 cm)	Bright Chrome White Polyester Black Polyester¹

Note:

Metric conversions are approximate.
¹Finishes available on special order.

Approvals

Style	Sin Model	K Factor	155°F 68°C	cULus
Flush Pendent	GL4248	4.1	•	•

Cross Section

Click image above for a detailed view of this product.

Installation Data

Flush Pendent

Model	Maximum Area of Coverage	Minimum Water Discharge & Pressures Needed (for up to 2/12 slope)	Minimum Water Discharge & Pressures Needed (for up to 8/12 slope)
GL4248	12' x 12'	11 G.P.M. - 7.2 P.S.I.	22 G.P.M. - 28.8 P.S.I.
	14' x 14'	11 G.P.M. - 7.2 P.S.I.	22 G.P.M. - 28.8 P.S.I.
	16' x 16'	13 G.P.M. - 10 P.S.I.	22 G.P.M. - 28.8 P.S.I.
	18' x 18'	17 G.P.M. - 17.2 P.S.I.	22 G.P.M. - 28.8 P.S.I.
	20' x 20'	20 G.P.M. - 23.8 P.S.I.	22 G.P.M. - 28.8 P.S.I.

*When these sprinklers are used in NFPA 13 Systems, a 0.1 design density minimums shall be utilized.
Minimum 9' sprinkler spacing.

Ordering Information

When ordering please specify the following.

Quantity
Model Number
Style
Orifice
Temperature
Finishes desired
Quantity - Millennium Wrenches - P/N 332334

Product Related Documents

Residential Sprinkler Installation Guide

Globe Product Warranty

Globe agrees to repair or replace any of its own manufactured products found to be defective in material or workmanship for a period of one year from date of shipment.

For specific details of our warranty please refer to Price List Terms and Conditions of Sale (Our Price List).

Bulletin: GL4248 Last Revised: July 2005 Revision: 5