F1FR28 Series Sprinklers Summary
Sprinkler
Model
K-Factor gpm/psi
1/2
(lpm/bar
1/2
)
Orientation
Listings & Approvals
Max. Working Pressure
psi (bar)
Sprinkler
Identification
Number (SIN)
F1FR28
2.8 (40)
Upright
cULus
175 (12)
RA1421
Pendent
175 (12)
RA1411
Table A
Model F1FR28 Pendent
Model F1FR28 Upright
Features
•
Standard coverage quick-response sprinklers
•
Upright and pendent deflectors
•
Low profile, compact design
•
Available in a wide variety of finishes
Product Description
Reliable Model F1FR series sprinklers are quick-response
standard spray automatic fire sprinklers utilizing a sensitive 3.0 mm
glass bulb thermal element.
Pendent and horizontal sidewall sprinklers may be installed
exposed or surface mounted using escutcheons such as the
Reliable Models B, C, or HB (reference Technical Bulletin 204).
When installed recessed, the Model F1FR28 series sprinklers
are specifically listed with and may only be installed with listed
Reliable escutcheons. Refer to the technical information on the
following pages for specific listings for recessed installations and
refer to Figure 3 for dimensional information.
When fitted with an approved water shield, these sprinklers may
considered intermediate sprinklers for use in racks, below grated
walkways, and other areas where intermediate level sprinklers are
required.
Table A provides a summary of the approvals and availability of
specific Model F1FR series sprinkler configurations. Additional
technical information for each sprinkler model is provided on the
following pages.
Note:
This bulletin may contain information on New and Legacy
sprinklers that reflects a dimensional change only. Sprinkler
Identification Number (SIN), application, performance, and
listings/approval are not otherwise affected. Sprinklers with new
frames can be identified by a rotoclip indent on one side of the
wrench boss and in some cases an installed rotoclip. Sprinklers
with new frames will include the suffix “N” in the order. For
reference only, legacy version of this sprinkler can be found on
Technical Bulletin 014.
www.reliablesprinkler.com
K-factor 2.8 (40)
F1FR28 Series
Quick-Response Sprinklers
Bulletin 072 May 2021
