including the body, inlet nozzle and metering orifice shall be of brass,
bronze or stainless steel. The body shall be clearly marked with a
flow-direction arrow, and the type and percent of AFFF concentrate that it
was designed to proportion. The proportioner size shall be [150] [_____]
mm [6] [_____] inch and shall have a maximum friction loss of [_____] kPa
psi at a flow rate of [_____] L/second gpm. The in-line balanced pressure
proportioner shall be an assembly that includes a proportioner as
described, integral pressure balancing valve with duplex pressure gauge,
inlet pressure gauge and manual ball valve. The proportioner assembly
shall be factory assembled and tested as an assembly by one manufacturer.
Field disassembly or assembly of any component part will not be accepted.
Components shall be of the make/model required by the specific UL listing
or FM approval.
2.19
AFFF CONCENTRATE CONTROL VALVE ASSEMBLY
Assembly shall be specifically designed and constructed to control AFFF
concentrate to proportioners and shall be arranged to open upon application
of water or AFFF solution pressure from the alarm check or automatic water
control valve to which it is connected. Valve shall be a listed or
approved automatic control valve specifically intended for this application
or a full port ball valve. All components shall be constructed of brass,
bronze or stainless steel, except that the internal portions of listed or
approved fire protection valves subjected to AFFF concentrate may be
provided with a coating warranted by the manufacturer to protect the valve
from the deleterious effects of the concentrate. All components shall be
rated for working pressure of 1200 kPa 175 psi or maximum working pressure
to which they could be subjected, whichever is greater. Valve shall be
certified by the manufacturer to be operable with water inlet pressure as
low as 207 kPa 30 psi. Valve components shall be brass, bronze or
stainless steel.
2.20
FOAM SYSTEM CONTROLS
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NOTE: A foam system control panel is required for
preaction and deluge sprinkler systems, as well as
for systems with nozzles. Systems using "hardwired"
devices are the simplest and will provide reliable
service with minimum maintenance and testing. Such
systems are appropriate for most applications.
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Panel shall be UL listed or FM approved for "Releasing Device Service" or
shall have modules approved for this purpose. Panel shall contain
components and equipment required to provide the specified operational and
supervisory functions of the system. Components shall be housed in a
[surface] [flush] mounted steel cabinet with hinged door and cylinder lock.
Control panel shall be a clean, uncluttered, and orderly factory assembled
and wired unit. Panel shall include integral "power on," "alarm," and
"trouble" lamps with annunciation of each alarm, supervisory and trouble
signal. The panel shall have prominent rigid plastic or metal
identification plates for zones, indicating lights, controls, meters, and
switches. Lamps and fuses mounted on circuit boards shall be identified by
permanent markings on the circuit board. Nameplates for fuses shall also
include ampere rating. Control panel switches shall be within the locked
cabinet. A suitable means shall be provided for testing the control panel
visual indicating devices (meter and lamps). Meters and lamps shall be
plainly visible when the cabinet door is closed. Signals shall be provided
SECTION 13955A
Page 22
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