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RA-8 Adjustable Concealed Pendent GL4247

Automatic Sprinklers Model GL4247 Adustable Concealed Pendent

Description and Operation

The Globe Model GL4247 Residential Adjustable Concealed Pendent Sprinkler is a low profile yet durable design which utilizes a 3mm frangible glass ampule as the thermosensitive element. It features economy, aesthetics and 1/2" of adjustment. The combination of the 3mm frangible glass ampule and specially designed deflector make the Model GL4247 Residential Adjustable Concealed Pendent Sprinkler the ultimate in life safety and fire control. This residential sprinkler has met the strict requirements of Underwriters Laboratories Inc. as described in the UL Standard, UL 1626, for Residential Sprinklers for Fire Protection Service, and should be used accordingly. These sprinklers should also be installed in accordance with the appropriate NFPA Standard 13R or 13D.

All that is seen at the ceiling is a 3 5/16" diameter ceiling plate color finished to match the specifier's exact requirements. Globe's Residential Adjustable Concealed Pendent Sprinkler utilizes its pendent residential type sprinkler which is concealed from view by a dome shaped ceiling plate that conceals the sprinkler just below the ceiling line for faster response once the ceiling plate has fallen away. The ceiling plate is soldered to the sprinkler's special upper support assembly in three places. Upon the application of sufficient heat, the plate falls to the floor exposing the residential 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 Model GL4247 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.

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

Specifications and Approvals

Sin Model	K Factor	Thread Size	Length	Finishes	155°F (68°C) WITH PLATE 135°F (57°C)	cULus
GL4247	4.2 (59 metric)	1/2" NPT	2 1/2" (6.4 cm)	Bright Chrome White Painted 1Satin Chrome 1Bright Brass 1Other Painted Finishes	•	•

Note:

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

Cross Sections

Installation Data

Concealed Pendent Sprinkler

Maximum Area of Coverage	Minimum Water Discharge & Pressures Needed
	Single Sprinkler	Two Sprinklers
12' x 12'	13 G.P.M. - 9.6 P.S.I.	11 G.P.M. - 7 P.S.I. (EACH)
14' x 14'	17 G.P.M. - 16.4 P.S.I.	13 G.P.M. - 9.6 P.S.I. (EACH)
16' x 16'	22 G.P.M. - 27.4 P.S.I.	16 G.P.M. - 14.5 P.S.I. (EACH)

Ordering Information

When ordering please specify the following.

• Quantity
• Model Number
• Style
• Orifice
• Temperature
• Finishes desired
• Quantity - Wrenches -P/N 325390
• Quantity - Recessed Wrenches - P/N 325391
• Quantity - Protective Caps - P/N 327119 (Friction Fit Recessed)

Product Related Documents

• Residential Sprinkler Installation Guide

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