A-10 One Inch Adjustable Flat Plate Concealed Pendent 4.9K Model GL4906

"The Inch" Residential Automatic Sprinklers Model GL4906 One Inch Adjustable Flat Plate Concealed Pendent

Description and Operation

The Globe Model GL4906 Residential One Inch Adjustable Concealed Pendent Sprinkler has a flat plate profile that utilizes a 3mm frangible glass ampule as the thermosensitive element. It features economy, aesthetics and the lowest allowable water flow with a nominal 1" of adjustment for easier installation. The combination of the 3mm frangible glass ampule and specially designed deflector make the Model GL4906 the ultimate in life safety and fire control. It has met the strict requirements of Underwriters Laboratories Inc. as described in UL Standard, 1626, for Residential Sprinklers for Fire Protection Service, and should be used accordingly. This sprinkler should also be installed in accordance with the appropriate NFPA Standard 13, 13D or 13R and under the direction of the approving authorities having jurisdiction.

All that is seen at the ceiling is the 3 5/16" diameter flat ceiling plate color finished to match the specifier's exact requirements. 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 prescribed temperature the internal pressure within the ampule exceeds the strength of the glass causing the glass bulb to shatter. This results in water discharge which 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 - -67°F (-55°C)

Frame - bronze
Deflector - brass
Screw - brass
Bulb seat - copper
Spring - nickel alloy
Seal - teflon
Bulb - glass with alcohol based solution, 3mm 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	155°F	68°C	Red	100°F	38°C

Specifications and Approvals

Sin Model	K Factor	Thread Size	Length	Finishes	155°F 68°C	cULus
GL4906	4.9 (68 metric)	1/2" NPT	3" (7.6 cm)	Bright Chrome White Painted Bright Brass¹ Satin Chrome¹Other Painted Finishes¹	•	•

Note:

Metric conversions are approximate.
¹Finishes available on special order. for painted plates other than white, contact Globe for ordering specifications.

Cross Section

Click image above for a detailed view of this product.

Installation Data for Flat and Sloped Ceilings**

Model	Maximum Area of Coverage	Minimum Water Discharge & Pressures Needed Per Sprinkler*
GL4906	12' x 12'	13 G.P.M. - 7 P.S.I.
	14' x 14'	13 G.P.M. - 7 P.S.I.
	16' x 16'	13 G.P.M. - 7 P.S.I.
	18' x 18'	17 G.P.M. - 12 P.S.I.
	20' x 20'	20 G.P.M. - 16.7 P.S.I.

*When these sprinklers are used in NFPA 13 systems, A 0.1 design density minimum shall be utilized.

**Refer to page 2 of the Globe Residential Sprinkler Installation Guide for NFPA 13D and 13R requirements.

Ordering Information

When ordering please specify the following.

Quantity
Model Number
Style
Orifice
Temperature
Finishes desired
Quantity - Concealed Wrenches - P/N 332765
Quantity - Protective Caps - P/N 332868

Cover Plate Size	White 135°F Part #	Chrome 135°F Part #
3 5/16"	332892	332891

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: GL4906 Last Revised: September 2011 Revision: 1