Dispenser for compressed natural gas (CNG) filling station

摘要

A fueling station dispenser for distributing a combustible gas that is lighter than air, and that includes electrical and gas handling sections in the same frame. A vapor barrier in the cabinet blocks fugitive gas that may be present in the gas handling section from entering the electrical section. According to most applicable codes, by isolating combustible gas from the electrical section gives it a Class I, Division 2 designation. Which eliminates the need to seal or air purge the electronics section as this designation allows for electronics that under normal intended operating conditions do not generate an arc with sufficient energy to initiate combustion.

主权项

1. A dispenser for use with a combustible gas comprising:
A frame; A gas handling section in the frame in communication with a supply of combustible gas; and An electronics section in the frame above the gas handling section, the electronics being in signal communication with the gas handling section; A vapor barrier in the frame that defines an obstacle to a free flow of fugitive gas to within the electronics section; and A vent system in which the fugitive gas from the gas handling section selectively bypasses the electronics section, the vent system including at least one vent disposed above the electronics section; and Wherein the vent system comprises vertical open spaces housed in side columns on lateral sides of the frame and; openings that extend through sidewalls of the gas handling section and that intersect with the vertical open spaces so as to define the at least one vent in the side columns on a side of the electronics section opposite the gas handling section, wherein the side columns define a communication path between the vertical open spaces and an ambient space.