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What is a Pump Coffee Machine

Coby McKinley Profile image

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Updated August 29, 2022

If you’re shopping for the best coffee maker, you might have considered a pump coffee machine. Espresso drinkers report a perfect espresso brew from pump machines. That said, if you want an affordable espresso machine with pump coffee, you’ll need to understand how these devices work and what they are. So, if you want to learn what is a pump coffee machine, read this guide.

For more guides on coffee maker tips and tricks, check out our articles discussing how to stop a coffee maker from burning coffee and what kind of thermostat is in a coffee maker.

KEY TAKEAWAYS:

  • A pump coffee machine is commonly known as an espresso maker.
  • There are multiple types of pumps, but the most common are rotary and vibration pumps.
  • Pump machines use pressure to force water through tightly-packed coffee grounds, creating shots of espresso.

Everything You Need to Know About Pump Espresso Machines

Pump coffee machines use a pump to force pre-heated water through coffee grounds inside the machine. Some models use brewing water directly from your waterline rather than a water tank for the hot water dispenser. If you are shopping for a pump unit, make sure it uses at least 7-15 bars of pressure. Anything less, and you won’t achieve the rich taste of espresso beverages.

If you are interested in infusing your brew, see our guide to what pre-infusion coffee makers are.

Insider Tip

Ensure you set your pump espresso maker to the correct temperature for the perfect cup of espresso or about 200 degrees Fahrenheit.

Types of Pump-Driven Machines

The differences between espresso machines are dependent on the type of pump you use and whether you want a manual or automatic espresso machine. There are two types: a rotary pump and a vibration pump. That said, whichever kind of pump machine you choose, ensure it has the 15-bar pressure pump required to make excellent espresso shots.

If you want to know which type of electronic pump for your shots of espresso, then read on. If, instead, you want to see a different type of coffee brewer, take a look at what a semi-automatic coffee maker is.

Rotary Pumps

A rotary pump is a mechanical device that utilizes a motorized, vaned disc inside a large chamber. As the disc rotates, the vanes press against the outer section, creating pressure. The hot water exits the pump as the pressure reaches optimal levels.

Rotary pumps are usually the tool of choice for the semi-automatic machines found in most coffee shops. However, since a semi-manual espresso machine requires some manual adjustment, they are harder to use. In addition, rotary pumps are quieter and longer lasting than vibrating models. That said, rotary models are more expensive to buy and maintain.

Vibration Pump

A vibration pump, like a solenoid vibratory water pump, uses electromagnetic energy to build pressure. In the unit, a magnet attached to a piston sits inside a metal coil. As current runs through the electric pump, the magnet quickly jets back and forth through the coil, pushing water through the pump.

Vibration pumps are usually the go-to for super-automatic machines. While vibration units are cheaper to buy or maintain, they won’t last as long as a rotary model. They are also louder, and unfortunately, the automatic process will sometimes result in inconsistent brewing pressure.

Warning

If your portafilter turns too far to the right, your gaskets are bad. If you do not replace the seal, you will have a serious hot coffee leak.

F.A.Q.S

How many bars of pressure do typical espresso machines have?

Entry-level espresso machines offer about 9 bars of pressure, but higher-end models use up to 15 bars.


What do bars mean on espresso machines?

A bar measures atmospheric pressure exerted on the finely ground coffee beans in the espresso coffee machine. A quality espresso brew requires consistent pressure, so pay attention to your meter.


Do more bars mean better espresso?

Don’t be tempted to purchase an expensive pump espresso machine with more bars of pressure. The ideal pressure for a shot of espresso is 7-15 bars of pressure.


How is the temperature on the machine controlled?

Any modern espresso machine should have programmable options for a stable brew temperature. In addition, barista-style espresso creations are only possible at a stable temperature between 195 to 205 degrees Fahrenheit.


STAT: A recent study from the Journal of Nutrition showed that 63% of coffee drinkers consume a single 8oz cup per day. (source)

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