HALE SmartFOAM 1.7AHP, Description, Installation And Operation Manual

Page: 47 / 93

Page 46
SmartFOAM
CHECK VALVE / INJECTOR FITTING
The Hale check valve/injector fitting, supplied with the
Hale SmartFOAM system, meets NFPA requirements for
a non-return device in the foam injection system. It
prevents back flow of water into the foam concentrate
tank.
When properly installed the brass and stainless steel
construction check valve/injector fitting ensures foam
concentrate is injected into the center of the water flow
for better mixing.
Note: Always position the check valve/ injector fitting at
a horizontal or higher angle to allow water to drain away
from the fitting. (See Figure 27
: Check Valve Injector
Fitting Installation ). This avoids sediment deposits or
the formation of an ice plug.
The check valve/injector fitting MUST be mounted in a
location that is common to all discharges which require
foam concentrate. (See Figure 28
: Injection and
Bypass Hose Connections ).
The Hale SmartFOAM system DOES NOT permit a
separate injection point for each foam capable
discharge.
The check valve/injector fitting has
– 1” NPT (25.4mm)
threads on the outside, to fit
into the 1” NPT threaded
connection on the Hale mini manifold
a pipe tee, or a 1”
NPT weld fitting installed in the discharge piping of the
fire pump. (See Figure 27
: Check Valve Injector Fitting
Installation ).
The inlet connection of the check valve/ injector fitting
uses a 1/2” NPT female thread.
Figure 27 : Check Valve Injector Fitting Installation