Model F1FR28 Upright Sprinkler
SIN RA1421
Technical Specifications
Style:
Upright
Threads:
1/2” NPT or ISO 7-R1/2
Nominal K-Factor:
2.8 (40 metric)
Max. Working Pressure:
175 psi (12 bar)
Material Specifications
Thermal Sensor:
3 mm Glass Bulb
Sprinkler Frame:
Brass Alloy
Cap:
Bronze Alloy
Sealing Washer:
Nickel with PTFE
Load Screw:
Copper Alloy
Deflector:
Brass Alloy
Sprinkler Finishes
(See Table B)
Sensitivity
Quick Response
Temperature Ratings
135°F (57°C)
155°F (68°C)
175°F (79°C)
200°F (93°C)
286°F (141°C)
Guards & Shields (New Frames)
F-1 Guard
F-3 Guard with Shield
Guards & Shields (Legacy Frames)
D-1 Guard
Sprinkler Wrench
Model W2
Model J (New frame with guard installed)
Model JD (Legacy frame with guard installed)
Listings and Approvals
cULus
Model F1FR28 Upright Sprinkler Components and Dimensions
Figure 1
Bulletin 072
May 2021
Page 2 of 6
www.reliablesprinkler.com
