Operation
When the Series DS-2 is in service,
water is prevented from entering the
assembly by the Plug with Sealing As-
sembly (Ref. Figure 1) in the Inlet of the
Sprinkler. The glass Bulb contains a
fluid that expands when exposed to
heat. When the rated temperature is
reached, the fluid expands sufficiently
to shatter the glass Bulb, and the Bulb
Seat is released. The compressed
Spring is then able to expand and push
the Water Tube as well as the Guide
Tube outward. This action simultane-
ously pulls inward on the Yoke, with-
drawing the Plug with Sealing Assem-
bly from the Inlet allowing the sprinkler
to activate and flow water.
Design
Criteria
The
Series DS-2 Sprinklers are in-
tended for use in fire sprinkler systems
designed in accordance with the
standard coverage installation rules
recognized by the applicable Listing
agency (e.g., UL Listing is based on
NFPA 13 requirements).
Page 2 of 6
TFP530
FIGURE 1
SERIES DS-2 STANDARD RESPONSE
DRY PENDENT SPRINKLER ASSEMBLY
SPRINKLER FINISH
Temperature
Rating
Bulb
Color Code
Natural
Brass
Chrome
Plated
135°F/57°C
155°F/68°C
175°F/79°C
Red
Yellow
Orange
TY5255
Standard Response
w/ Recessed Escutcheon
(Ref. Fig. 3)
TY5235
Quick Response
w/ Recessed Escutcheon
(Ref. Fig. 3)
TY5255
Standard Response
w/ Flush Escutcheon
(Ref. Fig. 2)
TY5235
Quick Response
w/ Flush Escutcheon
(Ref. Fig. 2)
1, 2
Notes:
1. Listed by Underwriters Laboratories, Inc. with order lengths per Figures 2, 3, and 4.
2. Listed by Underwriters Laboratories for use in Canada with order lengths per Figures 2, 3, and 4.
N/A - Not Available.
TABLE A
SERIES DS-2, STANDARD & QUICK RESPONSE - STANDARD COVERAGE, DRY TYPE SPRINKLERS
LABORATORY LISTINGS AND APPROVALS
Natural
Brass
Chrome
Plated
200°F/93°C
286°F/141°C
Green
Blue
TY5255
Standard Response
w/ Extended Escutcheon
(Ref. Fig. 4)
TY5235
Quick Response
w/ Extended Escutcheon
(Ref. Fig. 4)
Natural
Brass
Chrome
Plated
N/A
White
Polyester
White
Polyester
White
Polyester
1, 2
1, 2
COMPRESSION
SCREW
VENT HOLE
FRAME
SPRING
HELPER
INSERT
GASKETED SPRING
PLATE SEAL
PLUG WITH
WATER
TUBE
SPRING
BULB
CASING
SEAT
BULB
DEFLECTOR
3 or 5 mm
TUBE
GUIDE
BUTTON
SPRING
PIN
INLET
YOKE
OBSOLETE
