User's Manual

Component Descriptions
P/N 81-CO2MAN-001 2-69 September 2013
Figure 2-74. Pressure Operated Siren
2-8.5 Safety Outlet
The safety outlet, Part No. 81-803242-000 (Figure 2-75), consists of a safety disc housed in a
threaded body. The safety disc is designed to relieve at a pressure of 2400 to 2800 PSIG (166
to 194 Bar).
The safety outlet is utilized in systems with directional (stop) valves and lockout valves where
the design of the system creates a closed section of piping. The safety outlet is installed in the
piping upstream of the stop valve (s) to prevent over pressurization in the event of entrapment
of CO
2
in the closed pipe segment.
1/2 in. PIPE NIPPLE, 3 in. (76 mm) LONG
PIPE CAP
TYPICAL
DIRT TRAP
PERFORATED HOOD
6-7/8 in.
(175 mm)
5-3/4 in.
(146 mm)
1-9/16 in.
(40 mm)
3-3/4 in.
(95 mm)
4-5/8 in.
(117 mm)
5 in.
(127 mm)
1/2 in. UNION
FILTER
NOZZLE
ROTOR
2-7/16 in. (11 mm)
MOUNTING
HOLES
NOMINAL FLOW RATE AT 70 DEGREES
CARBON DIOXIDE 20.4 LBS/MIN