Abstract: A pilot valve assembly, for operating a pressure reducing valve disposed within a fuel tank, can include a housing including a first chamber and a second chamber, a first port in fluid communication with the first and second chambers, the first port being configured to receive an atmospheric pressure, a second port in fluid communication with the first and second chambers, the second port being configured to receive a fuel tank pressure, a first pilot valve arranged within the first chamber and configured to open only when a predetermined positive pressure differential exists between the first and second ports, and a second pilot valve arranged within the second chamber and configured to open only when a predetermined negative pressure differential exists between the first and second ports.

Abstract: A pilot valve assembly, for operating a pressure reducing valve disposed within a fuel tank, can include a housing including a first chamber and a second chamber, a first port in fluid communication with the first and second chambers, the first port being configured to receive an atmospheric pressure, a second port in fluid communication with the first and second chambers, the second port being configured to receive a fuel tank pressure, a first pilot valve arranged within the first chamber and configured to open only when a predetermined positive pressure differential exists between the first and second ports, and a second pilot valve arranged within the second chamber and configured to open only when a predetermined negative pressure differential exists between the first and second ports.

Abstract: A pressure relief valve assembly includes a housing, a diaphragm assembly separating the housing into a sensing pressure section and a tank pressure section, the sensing pressure section configured to sense both atmospheric pressure and the pressure in the tank pressure section and the tank pressure section is configured to only sense the pressure in the tank pressure section, an orifice disposed between the sensing pressure section and the tank pressure section allowing fluid to flow in through the orifice when the pressure in the sensing pressure section is less than the pressure in the tank pressure section fluid to flow out through the orifice when the pressure in the sensing pressure section is greater than the pressure in the tank pressure section.

Abstract: A pressure relief valve assembly includes a housing, a diaphragm assembly separating the housing into a sensing pressure section and a tank pressure section, the sensing pressure section configured to sense both atmospheric pressure and the pressure in the tank pressure section and the tank pressure section is configured to only sense the pressure in the tank pressure section, an orifice disposed between the sensing pressure section and the tank pressure section allowing fluid to flow in through the orifice when the pressure in the sensing pressure section is less than the pressure in the tank pressure section fluid to flow out through the orifice when the pressure in the sensing pressure section is greater than the pressure in the tank pressure section.