초록 ▼

A tank blanketing system protects both the tank vapor space and the environment. A pad valve supplies inert gas to the vapor space and maintains the pressure in the vapor space under conditions that tend to reduce the pressure in the vapor space. Should the pressure rise a predetermined amount above

A tank blanketing system protects both the tank vapor space and the environment. A pad valve supplies inert gas to the vapor space and maintains the pressure in the vapor space under conditions that tend to reduce the pressure in the vapor space. Should the pressure rise a predetermined amount above the setting of the pad valve, a depad valve will open to vent vapors so as to return the pressure in the vapor space to its designed operating range. The depad valve is connected to a recovery piping system that will route the vapors to an appropriate device that processes or disposes of them in a predetermined manner.

대표청구항 ▼

[ I claim:] [11.] A tank blanketing system for a storage tank, said tank blanketing system comprising:a pad valve for communicating with the storage tank,a depad valve for communicating with the storage tank,a diaphragm actuator connected to said pad valve,a depad pilot valve connected to said diaph

[ I claim:] [11.] A tank blanketing system for a storage tank, said tank blanketing system comprising:a pad valve for communicating with the storage tank,a depad valve for communicating with the storage tank,a diaphragm actuator connected to said pad valve,a depad pilot valve connected to said diaphragm actuator,a sensing port of said diaphragm actuator communicating with a vapor space in the storage tank, andat least one source of gas connected to said pad valve and to said depad pilot valve,said depad valve being in communication with said depad pilot valve for initiating opening of said depad valve to reduce pressurization of the vapor space upon detection of pressurization of the vapor space above a predetermined setpoint by said diaphragm actuator,said diaphragm actuator controlling said pad valve for increasing pressurization of the vapor space upon detection of pressurization of the vapor space below a predetermined setpoint by said diaphragm actuator.