Code Alarm SRT 5500 Specifications download pdf (Page 72)

December 2013

REQUEST FOR PROPOSALS FOR

PURCHASE AND DELIVERY OF HEAVY-DUTY BUSES

RFP SRTA-2014-01

TECHNICAL SPECIFICATIONS

PAGE-73

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5. The engine shall be capable of sending and receiving data via the J1939

communications standard.

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25.2 CNG Fuel System

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A. Tanks:

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1. The compressed natural gas (CNG) fuel tanks must be the lightest available tanks that

meet all the standards that meet all the standards of NGV 2, NFPA 52, DOT, and provide

a minimum of 21,000 SCF.

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2. Eight (8) Type III fuel tanks must be roof-mounted with tanks located as far outboard as

possible. A walkway along the centerline of the roof must also be provided. This walkway

will allow maintenance personnel to safely walk between the tanks with the fuel tank

cowlings either opened or closed.

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3. The tanks must be a twenty (20) year tank and certifiable to twenty (20) years.

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4. Low-pressure regulators shall be installed so that the drain hole is at the bottom of the

regulator, as they occasionally require draining.

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5. The high-pressure regulator shall be located so it is accessible for maintenance and

adjustment.

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6. There shall be an emergency ¼ turn shut-off valve between the tanks and the fueling

head, no higher than 68” to allow actuation while standing on the ground.

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7. The emergency relief valves on each cylinder shall have a vent pipe. The end of the pipe

shall be covered with a plastic cap to prevent debris from entering, but still be capable of

venting in case of emergency.

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8. A provision shall be provided to unload all of the fuel from the storage cylinders to a

facility based low-pressure gas line or storage facility. Connection shall be accessible at

the fueling fitting area and be properly protected and labeled. It shall be possible to

unload a full load of fuel in thirty minutes or less.

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B. Fueling:

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1. Fueling must take place on the right rear corner of the coach (curbside).

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2. Fuel door must have a minimum height from the ground to the door opening of 48.”

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3. Fuel door must have a starter and engine cut-out switch installed to prevent starting or

running the engine of the coach during fueling.

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4. Fueling must be able to be completed in less than five minutes from an empty state to a

completely full state.

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5. There shall also be a de-fueling fitting and valve system to unload the fuel supply from

the bus tanks.

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Code Alarm SRT 5500 Specifications Page 72

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