Specifications

December 2013
REQUEST FOR PROPOSALS FOR
PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES
RFP SRTA-2014-01
TECHNICAL SPECIFICATIONS
PAGE-21
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c. A spring-loaded, push-button type valve to safely release pressure or vacuum in
the cooling system shall be provided. A "T" fitting shall be installed prior to the
valve to allow pressure testing of the system. The valve and water filler shall be
located no more than sixty inches (60") above the ground and be accessible
through the same access door as the sight glass.
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12.5 Water Pump
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Water pump shall have sufficient capacity to prevent any hot spots under all operating
conditions.
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12.6 Hose/Clamps
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Engine water and heater hoses shall be premium quality Armet or Flex-Fab silicon hose,
or approved equal. All hoses shall be protected from engine heat which may cause
premature failure. All hose clamps shall have constant tension. Hose clamps shall be
1/2 inch wide minimum, stainless steel worm type, socket tightened with collar (Breeze or
Oetiker).
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12.7 Water Filter
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"Fleet Guard" spin-on water filter (no pre-charge type), or approved equal, with brass
shut-off valves both inlet and outlet, shall be installed in an easily accessible area.
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13. FIRE DETECTION/SUPPRESSION SYSTEM
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A dry chemical, pre-engineered fire suppression system, AMEREX model #V-25, or approved
equal, shall be furnished and installed for the protection of the coach. The system supplied
shall be approved and listed for use at -65 F (-54 C) to +150 F (66 C) by Factory Mutual
Research Corporation (FMRC). The automatic detection and actuation system shall provide
twenty-four (24) hour fire detection of the engine compartment. The system shall be designed
to operate at 12 to 24 VDC and shall not exceed a standby current draw of more than 0.1
amp. The system manufacturer shall provide a $5 million insurance policy (per vehicle, per
incident) to the SRTA. The inherent safety aspects provided by the suppression system
requires the manufacturer of the related equipment to be an ISO 9000 registered company.
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13.1 Agent Cylinders
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a. Agent Cylinder shall be of the stored pressure type minimum 25 pound capacity.
The cylinders shall be constructed of welded steel and must conform to
Department of Transportation (DOT) specification 4BW, and must be marked as
such. The hydrostatic retest interval for these cylinders shall be 12 years
minimum. Cylinders shall be modular, with each having its own discharge piping
and nozzles. Operating pressure for the cylinders shall be 350 psig.
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b. A gauge, protected by a rust-resistant chrome plated brass gauge guard, shall be
provided to indicate proper pressurization of agent cylinders. The agent cylinder
shall be equipped with a forged brass valve assembly. This valve shall retain and
release extinguishing agent and repellent pressure by means of a spring loaded
sealing stem. The valve shall be configurable for actuation by a pneumatic
control head. See "System Actuation." No replacement parts, such as burst
discs, shall be required to recharge the agent cylinder following discharge.