2
Installation Manual
MST
MANUAL SINGLE TANK FLUSH SELECTOR
EQUIPMENT DESCRIPTION
The valve has a FLUSH and FOAM TANK
position.
A switch mounted on the Hale
FoamMaster MST flush selector interlocks
with the Hale Foammaster system to
indicate when the selector is in the flush
position.
CAUTION:
The Hale FoamMaster MST
is not recommended for use on top
mount pump panels due to gravity
feed from foam tank to foam pump
requirements.
NOTE:
This manual details installation
and use of the Hale FoamMaster MST
flush selector only. Refer to the Hale
FoamMaster foam system manual for
information on complete foam
system installation instructions.
The Hale FoamMaster MST flush selector
is a simple and reliable valve that adds
NFPA compliant flush capabilities to the
Hale FoamMaster line of automatic
rotary gear pump foam proportioners.
The Hale FoamMaster MST flush selector
is a panel mounted valve that provides
a mechanical means of flushing the
Hale FoamMaster system. The major
component of the Hale FoamMaster
MST is a ball type selector valve. The
valve has 3 ports and is operated
manually. There is one ¾ inch NPT foam
concentrate inlet with swing check
valve attached and one ¾ inch NPT
foam concentrate outlet. The
remaining port is reduced to ¼ inch NPT
for the flushing water connection. The
flushing water connection is fitted with a
¼ inch NPT swing check valve to
prevent contamination of the water
supply with foam concentrate.
