Technical
Data
Approvals
The Model F822 thru F836 Mulsifyre
Nozzles are UL and ULC Listed, as
well as FM Approved.
The Model F822 thru F836 Mulsifyre
Nozzles with Model F880 Dust Caps
areULandULCListed.
Maximum Working Pressure
175 psi (12,1 bar).
Also refer to Figure 3, Note 2.
Discharge Coefficient
RefertoFigure1.
Water Distribution
Refer to Figure 2. Optimum flow pres-
sure is 30 to 60 psi (2,1 to 4,1 bar).
Thread Connection
3/4 inch NPT.
Physical Characteristics
(Basic Nozzle)
Body ..............Brass
Scroll ..............Brass
Physical Characteristics
(Nozzle with Dust Cap)
Body . . . . . Chrome Plated Brass
Scroll ..............Brass
DustCap........... EPDM
Wire..........StainlessSteel
Design
Criteria
Nozzle Placement. Where direct im-
pingement of water spray onto all of
the protected surface is required by
the Authority having Jurisdiction, the
nozzles are to be spaced and directed
so that their spray patterns will com-
pletely cover the plane-of-protection
with the minimum required average
density. With reference to Figure 2,
use of the “Design Spray Profile” for
the “Design Spray Area” will help as-
sure that direct impingement on all sur-
faces will occur. The “Design Spray
Area” shown at the top Figure 2 - Part
2 of 2 on Page 4 consists of the square
of length “S” within the circular “Overall
Spray Area”.
The maximum recommended axial
distances given in Figure 2 are based
on maintaining the specified spray pat-
terns under a maximum wind condition
of 15 MPH (24 km/h).
Dust Caps. The Model F880 Dust
Caps are rated for indoor and outdoor
use over a temperature range of -60F
to 150F (-51C to 65C). A minimum
residual (flowing) pressure of 15 psi
(1,0 bar) is required to assure release
of the Dust Cap.
Main Pipeline Strainers. Main pipe-
line strainers per NFPA 15 are re-
quired for systems utilizing Mulsifyre
Nozzles since their waterways are less
than 3/8 inch (9,5 mm) diameter. Indi-
vidual strainers are not required since
the openings in the scrolls will pass a
1/8 inch (3,2 mm) particle.
Page2of6
TFP810
FIGURE 1
MODEL F822 THRU F834 MULSIFYRE NOZZLES
NOMINAL DIMENSIONS
"L"
1" DIA.
(25,4 mm)
(PASSES A 1/8"
PARTICLE)
SCROLL
BODY
3/4"
NPT
F822
F824
F826
F828
F832
F834
NUMBER
MODEL
CODE
"L"
2-3/4"
(70 mm)
GRAY
ALUMINUM
1-5/8"
1-13/16"
(47 mm)
1-11/16"
(43 mm)
(42 mm)
1-5/8"
1-5/8"
(42 mm)
(42 mm)
WHITE
ORANGE
RED
YELLOW
LENGTH
NOMINAL
COLOR
(27 mm)
WRENCH
ACROSS
1-1/16"
FLATS
COLOR CODE PAINTED
ON WRENCH FLATS
K-FACTOR
(GPM ÷ psi)
NFPA
ISO/SI
(LPM ÷ bar)
2.0
2.3
2.7
2.6
4.6
5.1
73,4
37,4
66,2
38,9
28,8
33,1
FIGURE 2
MULSIFYRE NOZZLES
WITH DUST CAPS
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