Proposal Number PSDF #P09-0004
FLOWMETER
A paddlewheel type flow meter shall monitor water flow in foam capable discharges. The flow meter body
shall be constructed of bronze and the sensor assembly shall be locked into the tee with a pin and screw on
cap. The flow meter shall have a 500 PSIG (34 BAR) pressure rating per NFPA requirements.
One (1) flow meter is required for proper operation of the foam proportioning system. Power for the flow
meter sensor shall be provided through the electrically shielded cable set from the control unit. Flow meters
having NPT threaded and Victaulic connections shall be used in the water discharge piping.
The flow meter selected shall be sized to adequately monitor the minimum and maximum flow expected in
the foam capable discharges.
CONTROL CABLES
The cables for connection of the control unit, distribution box, flow meter sensor, flow meter display units,
pressure transducers and feedback sensor shall be 100% electrically shielded molded male by female
cordsets. The cordsets shall have the ability to connect together and total length shall not exceed 40 feet (12
meters). The connections shall be keyed to prevent mis-connection and improper system operation.
Shielding shall be provided by an aluminized mylar shield within the PVC outer jacket. A drain wire shall
be tied to one of the pins on each end of the cable. No externally attached ferrite beads shall be installed for
the purpose of electrical shielding. Coupling nuts on the cordset ends shall be constructed of nickel coated
brass. When properly connected the connections shall be sealed to NEMA 4X or equal.
LOW TANK LEVEL SWITCH
A low tank level switch shall be installed in the foam concentrate tank. The low tank level sensor shall be
connected to the foam proportioning system to provide protection against dry running of the foam pump.
The low tank level sensor shall be mounted on the side of the foam concentrate tank. The low tank level
sensor and electrical connections shall be sealed to prevent infusion of foam concentrate into the wiring and
possible short circuit of the tank level sensor.
FOAM SUPPLY
The foam proportioning system shall be supplied from a separate apparatus mounted foam concentrate
storage tank. The tank shall be constructed of materials compatible with foam concentrates being used in the
system. Provision shall be made for installation of low tank level sensors and routing of the wiring for the
sensors. Tank capacity, venting, fill opening and foam outlet plumbing connections shall be in accordance
with NFPA requirements.
DOCUMENTATION
The foam proportioning system when delivered to the end user shall include a foam concentrate
compatibility list and two (2) Description, Installation and Operation Manuals. The foam proportioning
system shall have a one (1) year limited manufacturer's warranty.
SINGLE TANK FOAM TANK REFILL SYSTEM
A truck mounted 12-volt foam tank refill system shall be provided and installed on the apparatus. The refill
system shall provide the ability to automatically refill the foam tank from the ground without carrying foam
