The Model A Royal Flush
Concealed Automatic Sprinkler is an
aesthetically pleasing, ceiling
sprinkler. The ceiling cover plate is
only 3
5
⁄
8
" (92.1 mm) in diameter. It
fits flush against the ceiling resulting
in a projection of only
3
⁄
16
" (4.8 mm)
below the ceiling.
The Model A is Listed* by U.L.,
U.L.C. and L.P.C.B. and Approved by
F.M. and M.E.A. (NY) for use as a
standard sprinkler that qualifies for
installation in accordance with current
NFPA 13 Standards.
The Model A is available with a
brass finish. Its mating cover plate is
available in three standard finishes,
brass, chrome plated and white
painted with additional special
finishes available.
Operation: The Model A Sprinkler
absorbs heat through the ceiling plate
which is secured to the support ring
by a fusible alloy. At its rated
temperature, the plate falls away and
exposes the sprinkler to direct heat
from the fire. Heat melts the
sprinkler's fusible element, releasing
water flow. Water is then discharged
in a designed flow pattern.
*For specific listing requirements see the appropriate
information contained in this brochure.
Manufactured by: Central Sprinkler Company
451 North Cannon Avenue, Lansdale, Pennsylvania 19446
Automatic Sprinkler - Model A
3
/
8
"
(9.5 mm)
,
7
/
16
"
(11.0 mm),
or
1
/
2
"
(12.7 mm)
Orifice
Concealed
Automatic
Sprinkler
A
1-98
Royal Flush™
Concealed
Model: A
Style: Concealed
Orifice Size and K-Factor:
3
⁄
8
"
(9.5 mm)
2.7
(38.9 metric)
7
⁄
16
"
(11.0 mm)
4.2
(60.6 metric)
1
⁄
2
"
(12.7 mm)
5.6
(80.8 metric)
3
⁄
8
"
(9.5 mm)
and
7
⁄
16
"
(11.0 mm)
are not
FM or LPCB Approved.
Thread Size:
1
⁄
2
"
(15 mm)
N.P.T.
Temperature Rating:
Sprinkler: 162
°
F/73
°
C
212
°
F/100
°
C
(U.L., U.L.C. Only)
Cover Plate: 135
°
F/57
°
C
165
°
F/74
°
C
Approvals: U.L., U.L.C., F.M.
(
1
⁄
2
"
(15 mm)
only),
L.P.C.B.
(
1
⁄
2
"
(15 mm)
only),
M.E.A. (375-75-SA)
•
3
⁄
8
"
(10 mm)
and
7
⁄
16
"
(11.1 mm)
are
Listed for Light Hazard only.
•
3
⁄
8
"
(10 mm)
and
7
⁄
16
"
(11.1 mm)
are
not FM or LPCB Approved.
Maximum Working Pressure:
250 psi
(17.3 bar)
(
1
⁄
2
"
(15 mm) Orifice)
U.L. and U.L.C.Only
175 psi
(12.1 bar)
– All Others
Factory Hydro Test:
100% at 500 psi
(34.5 bar)
Standard Finishes:
Sprinkler: brass
Cover Plate: brass, chrome plated
and white painted with
special painted
finishes available
No. 1-9.0
Technical
Data
Product
Description
Length: 2
1
⁄
2
"
(63.5 mm)
Cover Plate: 3
5
⁄
8
"
(92.1 mm)
diameter
Projection Below Ceiling:
3
⁄
16
"
(4.8 mm)
Highest Allowable Ambient Temp.:
100
°
F/38
°
C
Weight: 7 oz.
(198 grams)
fully assembled
with cover plate
OBSOLETE
