Bulletin 056
Page 5 of 24
December 2016
www.reliablesprinkler.com
Model DD80-27 Specific Application Sprinkler
SIN RA5692
Technical Specifications
Style: Upright
Orientation: Deflector horizontal
Threads: 3/4” NPT or ISO 7-1R3/4
Nominal K-Factor: 8.0 (115 metric)
Max. Working Pressure: 175 psi (12 bar)
Sprinkler Temperature Rating: 212°F (100°C)
Sensitivity: Quick-response
Hydraulic Design Criteria
(See Tables E and H)
Finish
Brass
Sprinkler Wrench
Model R2 or W2
Listings and Approvals
cULus Listed
Hazard Classification
Light Hazard
System Types
Wet-pipe with steel or Listed CPVC pipe
Dry-pipe with steel pipe
Installation Criteria
Sprinkler Spacing
Max: 6 ft (1.8 m) across roof slope
Min: 4 ft (1.2 m) across roof slope
Min: 26 ft (7.9 m) down the roof slope
measured parallel to the roof deck
Horizontal Distance from Face of Truss
Min: 6 inches (150 mm)
Vertical Distance of Deflector Above Scis-
sor Truss
Min: 18 inches (450 mm)
Horizontal Distance from Centerline of
Ridge
Max: 6 inches (150 mm)
Vertical Distance of Deflector Below Peak,
Ridge, or Deck
Min: 17 inches (430 mm)
Max: 21 inches (530 mm)
Material Specifications
Thermal Sensor: Nickel Alloy Solder Link
Levers: Stainless Steel
Sprinkler Frame: Brass Alloy
Button: Copper Alloy
Button Clip: Stainless Steel
Sealing Assembly: Nickel Alloy with
PTFE
Load Screw: Bronze Alloy
Deflector: Bronze Alloy
Model DD80-27 Sprinkler Components and Dimensions
Figure 4
Model DD80-27 Minimum Required Flow and Residual Pressure
Table E
Ceiling Slope
Max. Coverage
Area
ft x ft (m x m)
Flow
gpm (l/min)
Pressure
psi (bar)
6:12 to 8:12
6 x 40
1
(1.8 x 12)
28
(106)
12.3
(0.85)
6 x 63
2
(1.8 x 19)
38
(144)
22.6
(1.56)
6 x 66
3
(1.8 x 20)
40
(151)
25
(1.72)
5 x 70
4
(1.5 x 21)
38
(144)
22.6
(1.56)
1
Coverage is 20 ft (6.1 m) down slope in two directions measured along the floor.
2
Coverage is 31.5 ft (9.6 m) down slope in two directions measured along the floor.
3
Coverage is 33 ft (10.0 m) down slope in two directions measured along the floor.
4
Coverage is 35 ft (10.7 m) down slope in two directions measured along the floor.
