FAQs

What is the liquid in your glass bulb sprinklers?

The liquid used in our glass bulb sprinklers is a non-toxic proprietary glycerin solution that that expands when heated.

Why are the bulbs different colors?

The different colors designate various temperature classification ratings in accordance with NFPA 13.

Why are the bulbs different sizes?

The different size bulbs determine the type of sprinkler response. 5mm bulbs are used for standard response sprinklers; 3mm bulbs are used for quick response sprinklers; 2.5mm bulbs are used for ESFR’s.

What are the pressures and flows for your standard spray sprinklers?

Standard spray sprinklers both quick response and standard response are control sprinklers, and the minimum pressure is 7 psi as per NFPA 13. Any pressure above that is calculated based on density (GPM per Sq. ft.) required for your design. The amount of flow in GPM is based on the density curves in NFPA 13. The pressure to achieve that flow is based on the sprinkler spacing and the K Factor of the sprinkler and the pressure available based on your design and the available water supply. You must calculate the flow required using the formula Q= K√(P) and P = ()2 to determine the pressure.

Q = Flow (in gpm)

K = K Factor

P = Pressure (in psi)

With Extended Coverage, Residential and ESFR the pressures and flows are listed for each of the sprinklers based on the distribution and fire tests conducted on each at the laboratories.

How do I determine the proper temperature rating for my sprinklers?

The maximum ambient ceiling temperature that the sprinkler will be exposed to on a daily basis determines the appropriate sprinkler temperature rating, except where the NFPA standards may dictate the temperature rating for design considerations. Even then, one must still consider the maximum ambient ceiling temperature anticipated on a daily basis. Ambient temperatures in excess of these maximums would cause stress on the thermal element, eventually weakening its load carrying capacity and possibly causing the sprinkler to operate prematurely. Refer to the Temperature Ratings, Classifications, and Color Codings Table in NFPA 13.

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