Patent ID: 6827112
Filing Date: 2004-12-07
Classification: F17C,Y10S

Abstract:
A system for controlling a hazardous fluid distribution facility having a perimeter with an entrance, an electrical power input, a source of gas under pressure, a principal fluid storage tank, a tank valve pneumatically actuable to provide fluid flow communication with said principal fluid storage tank and having a closed state in the absence of said actuation, a fluid pump in fluid flow communication with said tank valve, and a motor coupled to drive said fluid pump when enabled, comprising:a start switch connectible with said electrical power input and actuable to provide a system start output; an electrically controllable valve coupled in gas flow relationship with said source of gas under pressure and responsive to an on-state input to apply gas under pressure from said source at a valve output, to effect the pneumatic actuation of said tank valve and effecting said tank valve closed state by venting said gas applied thereto in the absence of said on-state input; a gas pressure control monitor responsive to the pressure of said gas from said valve output, having a system enable condition when said gas pressure is at an enable value and having an off condition when said gas pressure is lower than said enable value; a control network responsive to said start switch system start output to provide said on-state input to said electrically controlled valve, and responsive in the presence of said gas pressure monitor enable condition and said on-state input to maintain said on-state input.