Pressure Balancing System includes a check valve and a pressure-balancing valve. The pressure balancing valve permits the flow of refrigerant in an opposite direction from the receiver to the condenser in order to maintain the pressure in the receiver below a maximum pressure level. The pressure-balancing valve is installed on a bypass line parallel to the check valve. Pressure balancing system incorporates either a piston or diaphram balancing member controller device, which controls a three-way pneumatic valve for charging or venting the dispensing tank. A pressure-balancing system includes a pressure balancing device, which reduces the pressure differential between the sealing-fluid and the gaseous fuel used in the injection valve.