135 Degree F Upright Bulb, Brass

Globe® 1/2", 5mm bulb-type (Model GL) SPRINKLER HEADS (1/2" NPT) are UL listed and FM approved. K factor is 5.6.

135 Degree F Upright Bulb, Brass

FEATURES

UL listed and FM approved.

Rugged frame, expanded wrench area.

Tapered orifice prevents turbulence, provides unifrom distribution throughout all pressures.

Unique deflector accounts for high degree of water atomization associated with Firematic sprinklers.

Operates at full volume approximately one-tenth of a second after pressure is released.

PRINCIPLES OF OPERATION

The glycerin inside the bulb has a higher coefficient of thermal expansion than the glass bulb. Thus, when heated, it expands faster than the glass, causing the glass to shatter. The water pressure then pushes the retainer out of the way.

SPECIFICATIONS

DIMENSIONS: Length: 2 1/4"
Width: 1 3/4"
Orifice: 1/2"
Thread: 1/2" NPT

SET POINT: 135° F

TEMPERATURE RANGE: -40° F to 100° F

Note: The bulb does not suffer any ill effects from cold temperatures - the glycerin inside will not allow the bulb to freeze. If one activates in cold weather, it's most likely due to the high pressures that result from water freezing in a fixed volume (e.g., the pipe).
COVERAGE: 10' x 10'

BULB LIQUID: Glycerin

K FACTOR: 5.6

RELATED PARTS: Use only Firematic and Globe sprinkler wrenches SPWR , RSW2

Price: $10.00
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Manufactured by Brooks Equipment

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