Hale Trailer - Manual (Page 30)

❑ Accessories / Options
30 Accessories / Options - Skid & Trailer
p/n: 209-0020-101-0
Hale FoamLogix
Foam systems accu-
rately deliver from
0.1% to 10.0% foam
concentrate through
a check valve / injec-
tor fitting, directly into
the water discharge
stream. It is then fed
as foam solution into
a standard fog noz-
zle, an air aspirated
nozzle, or CAFS
equipment, through
the apparatus dis-
charge piping. A
properly configured
and installed foam
system with Hale
recommended com-
ponents virtually eliminates contamination of the booster tank, fire pump
and relief valve with foam concentrate.
2A.6 PRESSURE AND RELIEF VALVE CONTROL
Note: For additional information about the
pressure and relief valves in your system, see
the separate manual provided with the valves.
Also see Section 7, “Drawing Package” on
page 73.
P Series Relief Valve System
The P Series relief valve system is a bronze,
variable-pressure setting, relief valve that
prevents undue pressure per the require-
ments of NFPA Standard 1901. An AMBER
indicator light on the operator control panel
signals when the valve is open. (See Figure
2a-6: “P Series Relief Valve Control.”)
The P series relief valve system includes a
panel mounted control valve (PM) and a
relief valve (P25, P30 or P30V). Also see
Section 7, “Drawing Package” on page 73.
Figure 2a-5: Typical Foam Proportioning System
Figure 2a-6: P Series Relief Valve
Control