The Reliable Automatic Sprinkler Co., Inc.,
103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 180
September 2018
Bulletin 180
September 2018
Pilot Line Detector (PLD)
Fixed Temperature Release
F1-FTR
Fixed Temperature
Release
Features:
1. Fixed Temperature
Heat Responsive Detector
2. Installed Positions:
• Pendent
• Upright
3. Quick Response
4. Temperature Ratings:
135°F (57°C), 155°F (68°C),
175°F (79°C), and 200°F (93°C).
5. ½” (15 mm) Orifice with
½” NPT (R½) Thread
6. Die cast Brass Frame
7. Listed spacing
a. 40 ft x 40 ft (12 m x 12 m) for 155°F
(68°C), 175°F (79°C) and 200°F (93°C)
b. 50 ft x 50 ft (15 m x 15 m) for 135°F (57°C)
Product Description:
The Fixed Temperature Release (FTR) Pilot Line Detec-
tor (PLD) is designed to be used on wet or dry pilot line
release systems and trigger the operation of deluge sys-
tems, non-interlock preaction systems, single interlock
and double interlock systems. The FTR incorporates a
2.5 mm glass bulb with a Model F1 Sprinkler frame. It
is identified as a Fixed Temperature Release (FTR) to
differentiate it from a sprinkler. The FTR is made of die
cast brass and is available in various finishes. During fire
conditions the heat sensitive liquid in the bulb expands,
the bulb shatters, releasing the cap and spring assem-
bly. This triggers the opening of the pilot line, releasing
the pressure (air, gas or water), causing the deluge or
preaction system valve to open and deliver water under
pressure to the system pipes.
Listings and Approvals
1. Listed with Underwriters Laboratories Inc. and UL
Certified for Canada (cULus)
2. NYC MEA 258-93-E
Technical Data
Thread Size: ½” NPT (R ½)
Orifice: Nominal ½” (15 mm)
Thermal Sensor: 2.5 mm glass bulb
Rated to 175 psi (12,1 bar) (12,066 kPa)
Frame – Die cast Brass
Seal – Teflon Coated
Standard Finishes –
Brass, Chrome plated or Polyester White
(1)
.
Factory tested Hydrostatically to 500 psi (34,5 bar)
(34,475 kPa).
(1)
Polyester White is UL and ULC Listed corrosion resistant.
Installation
The F1-FTR must be installed in accordance with NFPA-
13 specifications and after the pilot line system piping is in
place (to prevent possible damage to FTR). Before install-
ing be sure the F1-FTR has the appropriate temperature
rating which should be lower than the temperature rating
of system nozzles or sprinklers. Apply a small amount of
pipe joint compound to the male thread when installing
FTR.
Install the F1-FTR into the pilot line piping using only the
special Model W2 Wrench. (See Bulletin 205).
The F1-FTR must be handled carefully, and stored in a
cool, dry place in the original container. Never install a
F1-FTR that has been dropped or damaged in anyway. Do
not install the F1-FTR if the bulb is cracked or seems low
on liquid. If the F1-FTR is not returned to Reliable it should
be destroyed. Never install a F1-FTR that has been ex-
posed to a temperature in excess of the allowed ambient
temperature.
The F1-FTR can be installed in any position; however, in
locations where the pilot line system is exposed to freez-
ing conditions install them in the upright position only. Wet
pilot lines must be installed where there is adequate heat
to avoid possible freezing. An F1-FTR pilot line that may
be subject to mechanical damage must be protected by
the appropriate sprinkler guard (see Bulletin 208) for the
F1 Model.
