TECHNICAL DATA
Approvals
UL and C-UL Listed. FM Approved.
(Listings and approvals only apply to the service condi-
tions in the Design Criteria section.)
Maximum Working Pressure
175 psi (12,1 bar)
Pipe Thread Connection
1 inch NPT or ISO 7-R1
Discharge Coefficient
K = 25.2 GPM/psi
1/2
(362,9 LPM/bar
1/2
)
Temperature Ratings
165°F/74°C or 214°F/101°C
Finish
Natural Brass
Physical Characteristics (Ref. Figure 1)
The Pulsar ESFR-25 utilizes a dezincification resistant
bronze alloy frame. The strut and hook are monel; the but-
ton, deflector, and compression screw are bronze. The
gasketed spring plate consists of a beryllium nickel disc
spring that is sealed on both its inside and outside edges
with a Teflon
gasket, and the two halves of the fusible
link assembly are nickel.
Patents
U.S.A. Patent Number 4,580,729, 5,829,532, and
6,059,044 are applicable to the Pulsar ESFR-25. Other
patents are pending.
DESIGN CRITERIA
UL and C-UL Listing Criteria
The Pulsar ESFR-25 (SIN S8010) Sprinklers are UL and
C-UL Listed as “Early Suppression Fast Response Sprin-
klers” for installation per NFPA 13 or other applicable
NFPA standards.
UL and C-UL Specific Application Listing Criteria
The Pulsar ESFR-25 (SIN S8010) Sprinklers are UL and
C-UL Listed as “Specific Application Early Suppression
Fast Response Sprinklers” for use in in accordance with
NFPA 13 to protect single-, double-, and multiple row rack
storage and palletized and solid pile storage (no open
containers or solid shelves) of Class I, II, III, and IV com-
modities encapsulated or unencapsulated and cartoned
Group A unexpanded plastics when installed with the fol-
lowing storage and ceiling heights and minimum design
pressures:
Maximum
Maximum
Minimum
Storage
Ceiling
Flowing
Height,
Height,
Pressure,
Ft. (m)
Ft. (m)
psi (bar)
40 (12,2)
45 (13,7)
40 (2,7)
35 (10,7)
40 (12,2)
25 (1,7)
30 (9,1)
35 (10,7)
20 (1,4)
25 (7,6)
30 (9,1)
15 (1,0)
When applying the specific application listing criteria, the
Pulsar ESFR-25 Sprinklers should be installed using the
same installation obstruction and construction criteria, as
well as deflector-to ceiling distances, as is applicable for
Early Suppression Fast Response Sprinklers having a
nominal K-Factor of 25.2 per NFPA 13.
FM Approval Criteria
The Pulsar ESFR-25 (SIN S8010) Sprinklers are FM Ap-
proved as “Early Suppression Fast Response Sprinklers”
for installation per the applicable FM Loss Prevention
Data Sheets.
STAR SPRINKLER
Page 2
1-4.1.11
FIGURE 1
PULSAR ESFR-25 PENDENT SPRINKLER
1" NPT
(BOTH SIDES)
WRENCH FLAT
(96.8 mm)
3-13/16"
9/16" (14.3 mm)
NOMINAL MAKE-IN
2" (50.8 mm)
TEMPERATURE
RATING
ASSEMBLY
LINK
HOOK
DuPon
t
Regi
ste
red
Trad
emar
k
OBSOLETE
