A-91 Dry Type Concealed Pendent Sprinkler

GL Series Dry Type Concealed Pendent

Description and Operation

The Globe GL Series Dry Type Concealed Pendent Sprinkler is designed for use in special applications such as freezing environments and conditions where sediment or foreign materials might accumulate in ordinary drop nipples. It 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 GL Series Dry Concealed Sprinkler may be virtually invisible as it does not interrupt the "smooth flow" of the ceiling. Globe's Dry Concealed Sprinkler utilizes its frangible 5mm glass bulb 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 releasing the bulb seat, causing the inner tube assembly to move allowing the spring assembly to pivot alongside the inner tube. At this time, water flows through the sprinkler and is distributed by the deflector in an approved discharge pattern.

A special spring is attached to the pendent deflector that serves to provide a constant tension against the ceiling plate. This feature virtually ensures freedom from environmental vibration problems.

The heart of Globe's GL Series sprinkler proven actuation 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 - brass
Spring - teflon coated nickel alloy
Retainer - brass
Pin - stainless steel
Torsion spring - stainless steel
Bulb - glass with glycerin solution, 5mm size
Orifice insert - brass
3/4" or 1" NPT
Outer tube - galvanized steel pipe
Inner tube - stainless 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
5.6	(80 metric)	3/4" or 1" NPT	cULus Variable to 48" FM Variable to 36"	Bright Chrome White Polyester ¹Satin Chrome ¹Bright Brass ¹Other Painted Finishes
8.1	(116 metric)	1" NPT

Nominal 'K'
Factor

Thread Size

Length

Finishes

5.6

(80 metric)

3/4" or 1" NPT

cULus Variable to
48"

FM Variable to
36"

Bright Chrome
White Polyester
¹Satin Chrome
¹Bright Brass
¹Other Painted Finishes

8.1

(116 metric)

1" NPT

Note:

Metric conversions are approximate.
¹Finishes available on special order.
Painted plates other than white require customer to furnish paint. Contact Globe for paint specification.

Approvals

Style	Sin Model	K Factor	Thread Size	135°F (57°C) w/plate 135°F (57°C)	155°F (68°C) w/plate 135°F (68°C)	155°F (68°C) w/plate 155°F (68°C)	175°F (79°C) w/plate 155°F (68°C)	200°F (93°C) w/plate 155°F (68°C)	cULus	* FM
Concealed Pendent	GL5681	5.6	1" NPT	•	•	•	•	•	•	•
	GL5682	5.6	3/4" NPT	•	•	•	•	•	•
	GL8181	8.1	1" NPT	•	•	•	•	•	•

Note: Listed for all hazards
* Concealed Pendent style - FM Approvals 135° F Cover & 155° F Sprinkler; 155° F Cover & 200° F Sprinkler

Cross Section

Click image above for a detailed view of this product

Installation Data

Globe GL Series Dry Concealed sprinklers should be installed in accordance with the requirements set forth in NFPA 13. These sprinklers are to be installed using a pipe wrench applied to the outer tube. When this is not possible, the proper sprinkler head wrench may be used with extreme care for lengths up to approximately 18". Excessive force may distort the frame thus destroying the unit.

When installed in a wet system extending into a freezing area, see chart on Dry Caution Sheet for minimum exposed barrel length to prevent ice plugs. Please refer to our Dry Caution Sheet for further important installation data.

Ordering Information

When ordering please specify the following.

Quantity
Model Number
Style
Orifice
Temperature
Finishes desired
Quantity - Concealed Wrenches - P/N 337014
Quantity - Protective Caps - P/N 327119
"A" Dimension - Distance from face of fitting to the
finished ceiling line regardless of escutcheon used.

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: GL5681 Last Revised: August 2010 Revision: 12