FEBRUARY, 2020
HD 284
PAGE 1 OF 4
HD FIRE PROTECT
PVT. LTD.
CONCEALED PENDENT SPRINKLER
STANDARD & QUICK RESPONSE
TECHNICAL DATA
DESCRIPTION
Pendent Concealed Sprinklers
HD Pendent Concealed Sprinklers are thermo-sensitive
glass bulb sprinklers having decorative flat cover plate
designed to conceal the sprinkler for smooth ceiling.
The cover plates are available in several decorative
finishes to match architectural requirements. The
unique design allows installation and testing of the
sprinkler prior to installation of the cover plate with
cup. Sprinkler housing is threaded to fix cover plate
with cup assembly to provide 6.5 mm (1/4”) vertical
adjustment.
The cover plate and cup design allows installation
of the sprinkler and pressure testing of the fire
fighting system prior to installation of a suspended
ceiling or final painting of the ceiling. The sprinkler
cover assembly can be removed and reinstalled for
removal of ceiling panels for access to building service
equipments. HD Pendent Concealed Sprinklers
are Standard Response (5mm glass bulb) or Quick
response (3mm glass bulb) with standard coverage.
LISTED
Style
Concealed Sprinkler
Temperature
Standard Response with 5mm
Response
glass bulb, Quick Response
with 3mm glass bulb
Coverage
Standard Coverage
K-Factor
5.6 US (80 metric)
Nominal
½” BSPT (NPT Optional)
Thread Size
Max. Working
175 PSI (12 Bar)
Pressure
Factory
500 PSI (35 Bar)
Hydrostatic
Test Pressure
Min. Operating
7 PSI (0.5 Bar)
Pressure
Approvals
UL Listed & FM Approved
Finish
Sprinkler - Brass
Cover Plate - White/ Chrome
Plated
Ordering
Style, Temp. Rating &
Information
Response, Thread type,
Finish, Cover specification.
SIN Number
HD 104 Standard Response
HD 204 Quick Response
Approvals
HD 104 Sprinklers are UL Listed and FM Approved as
Standard Response with 5mm bulb.
HD 204 Sprinklers are UL Listed as Quick Response
and FM Approved as Standard Response with 3mm
bulb.
Factory Mutual (FM) does not approve concealed
sprinklers under quick response category.
* Only FM
Table 1
Response
Type
Type
Temp Rating
Bulb/Cover Plate
Listing
Code No
for UL
Code No for
UL & FM
SR
CONCEALED
57°C / 57°C
68°C / 57°C
79°C / 68°C
93°C / 68°C
T10138
T10102
T10105
T10140
-
T10102F
T10105F
T10140F
QR
CONCEALED
57°C (135°F)
68°C / 57°C
79°C / 68°C
93°C / 68°C
-
T10100
-
-
-
T10100F
*
T10101F
*
T10104F
*
