Often, the terms “gas pump” and “dispenser” are used interchangeably to describe the same equipment. However, there’s a significant difference in how these two mechanisms transfer gas from the tank to your customers.
Fuel delivery at service stations occurs either via a self-contained gas pump or through a gasoline dispenser. Choosing between the two involves weighing their respective advantages and disadvantages. Delving into these differences can aid in making informed decisions that positively impact your gas station business operations.
Storage tank
At the heart of service stations are underground storage tanks, holding varying gasoline grades. Stations typically have at least two tanks, each capable of housing several thousand gallons of gas.
Suction pumps vs. submersible pumps
The primary divergence between a gas pump and a dispenser lies in how fuel moves from the storage tank to the unit and, subsequently, to the customer. Understanding their operational mechanisms is key to determining optimal choice.
Mechanism of suction pump
In stations employing a self-contained gas pump, fuel is drawn from the underground tank via a suction line. As the pump operates, it extracts fuel exclusively for that particular pump.
Utilizing the principle of unequal pressure, a motor positioned above fluid level extracts air from pipe, reducing air pressure around gasoline. As air pressure inside pipe decreases, weight of the surrounding air pushes the gas upwards, counteracting gravity’s pull. This process continues until gas ascends into the aboveground dispenser.
Concept of submersible pump
Contrarily, dispensers rely on a submersible pump unit located within the underground tank. This pump propels fuel from the tank to a delivery system, enabling multiple dispensers to be supplied simultaneously—an advantageous feature preferred by many station owners.
Submerged below the liquid’s surface, the impeller, resembling a propeller, propels the fuel upward through slanted blades. This mechanism facilitates the movement of liquid gas over extended vertical distances efficiently.
Importance of check valves
Post-pumping, the gas inside the pipe is retained by a check valve, preventing it from flowing back into the tank. This valve creates an airtight seal above the fluid, ensuring a steady gas supply to the dispenser without undue wait times, enhancing customer satisfaction. Understanding the intricacies of gas delivery systems enables station owners to make informed choices, optimizing their operational efficiency and customer experience. Now you can make an informed decision whether or not to purchase used fuel pumps for sale.