A-71 Adjustable Concealed (Dome) Pendent Sprinkler

GL Series Adjustable Concealed Pendent

Description and Operation

The Globe GL Series Adjustable Concealed Pendent Sprinkler offers the ultimate in low profile, aesthetically pleasing appearance. All that is seen at the ceiling is a 3 5/16" diameter ceiling plate color finished to match the specifier's exact requirements. The Sprinkler is available with 1/2" of adjustment and a deeper profile cover plate assembly. The GL Series Adjustable Concealed Sprinkler may be virtually invisible as it does not interrupt the "smooth flow" of the ceiling. Globe's Adjustable Concealed Sprinkler utilizes its frangible glass ampule type sprinkler which is located above the ceiling and concealed from view by the ceiling plate. The plate is soldered to the sprinkler special upper support assembly in three places. Upon the application of sufficient heat, the plate falls to the floor exposing the pendent spray sprinkler. At the ampule's rated temperature, the sprinkler opens discharging water onto the floor in its required and approved distribution pattern.

The heart of Globe's GL Series sprinkler proven 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 the internal pressure within the ampule exceeds the strength of the glass causing the glass to shatter. This results in water discharge which is distributed in an approved pattern.

Technical Data

Temperature Ratings -
135°F (57°C) Sprinkler, 135°F (57°C) Cover Plate
155°F (68°C) Sprinkler, 135°F (57°C) Cover Plate
155°F (68°C) Sprinkler, 155°F (68°C) Cover Plate
175°F (79°C) Sprinkler, 155°F (68°C) Cover Plate
200°F (93°C) Sprinkler, 155°F (68°C) Cover Plate
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)
Frame - bronze

Deflector - brass
Screw - brass
Bulb seat - copper
Spring - nickel alloy
Seal - teflon
Bulb - glass with glycerin based solution, 5mm size
Cover Plate - brass
Upper Escutcheon Assembly - steel

Sprinkler Temperature Rating/Classification and Color Coding

Classification	Available Sprinkler Temperatures		Bulb Color	N.F.P.A. Maximum Ceiling Temperature
Ordinary	135°F/155°F	57°C/68°C	Orange/Red	100°F	38°C
Intermediate	175°F/200°F	79°C/93°C	Yellow/Green	150°F	66°C

Specifications

Nominal 'K' Factor		Thread Size	Length	Finishes
2.8	(39 metric)	1/2" NPT	2 1/2" (6.4 cm)	Bright Chrome White Painted Bright Brass¹ Satin Chrome¹ Other Painted Finishes¹
4.2	(59 metric)	1/2" NPT
8.1	(116 metric)	3/4" NPT

Note:

Metric conversions are approximate.
¹Finishes available on special order. Painted plates other than white required customer to finish paint.

Approvals

Style	Sin Model	K Factor	135°F (57°C) with plate 135°F (57°C)	155°F (68°C) with plate 135°F (57°C)	155°F (68°C) with plate 155°F (68°C)	175°F (79°C) with plate 155°F (68°C)	200°F (93°C) with plate 155°F (68°C)	cULus
Concealed Pendent	GL2856	2.8	•	•	•	•	•	•
	GL4256	4.2	•	•	•	•	•	•
	GL8173	8.1*	•	•	•	•	•	•

:*Listed For All Hazards

Cross Sections

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Ordering Information

When ordering please specify the following.

Quantity
Model Number
Style
Orifice
Thread Size
Temperature
Finishes desired
Quantity - Concealed Wrenches - P/N 325391
Quantity - Protective Caps - P/N 327119

Product Related Documents

Discharge Tables & Spray Patterns

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: GL2856 Last Revised: October 2012 Revision: 4