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Important Parts of an Espresso Machine A top espresso machine should provide a robust and rich-bodied shot of coffee, with a full-bodied flavor and intense aroma. This requires high levels of temperature and pressure. You should also be aware of the crema, a golden brown layer that gives an incredibly rich espresso its distinctive flavor and color. There are four types of espresso machines: manual, semi-automatic automated, super-automatic and semi-automatic. Water reservoir The reservoir for water is the container that houses the water that is cold, filtered and that is fed to the espresso machine. It is usually movable and comes with an lid that keeps the water clean and free of dust. It is an essential component of an espresso machine and must be kept clean to prevent clogging. To clean it, you can pour vinegar into the reservoir and let it run for several minutes. The espresso machine makes use of water to pressurize the coffee grounds and extract the oils, flavors, and caffeine. It also produces crema, which is the foam. The first espresso machines were created by Achille Gaggia. They used pistons connected to levers to produce high-pressure coffee. Gaggia's spring-piston levers drove the water through the coffee and into the cup, and introduced new terms for what consumers called “coffee cream” (crema). The pump utilizes electricity to push water through the heating element to heat it to the ideal brewing temperature of 195 degrees Fahrenheit. It is typically located at the bottom of the machine and attached to a tubing that runs up through the heating element. The tube is also connected on either end to the cold-water tube and the hot-water tube. It also goes under the heating elements of resistance that are coated with white grease to keep the plate warm. Pump The pump is what makes an espresso machine work and there are a variety of kinds. Certain machines utilize a vibratory pump, also known as a vibe pump, which uses an electromagnetic motor that moves between the sides of the form of a coil at 60 pushes per sec. The pump pushes water into the portafilter, and then out of the spouts. Other pumps use a thermoblock or thermocoil heating system that will precisely heat the water to the desired temperature for brewing. These systems also allow the control of water pressure and temperature, which is important to a successful extraction. Pump-driven espresso machines may use a piston, spring or electric pump. However, they all require that water be moved through the grounds of the coffee with high pressure. The higher the pressure the more efficient the extraction. The pump makes sure that the coffee is evenly distributed and helps to produce good crema. Steam-driven and piston-driven espresso machines are also available. Steam pressure is used to force water through the grounds of the coffee beans in a steam driven espresso machine. This type of espresso machine is less expensive but does not produce enough pressure for extraction. There are also air-pump-driven machines, which are lighter and smaller in size, but do not require a boiler and can be powered by a hand pump or a canister filled with compressed air (such as N2 or CO2). Air-pump espresso makers produce less espresso than pump-driven machines, but may be more convenient for some people. Steam Wand The steam wand is the thin metal pipe that comes from the espresso machine and shoots steam hot and pressurized into your milk to create foamy drinks such as cappuccinos, lattes. The wand can be used heat tea, cocoa or other hot drinks. The wand has several holes that can be turned on and off to regulate the amount of steam released. Certain machines come with traditional wands, while others have a Pannarello wand that is easier to use however it doesn't produce the same foam needed for latte art. If you're experiencing problems with in frothing milk, it might be that your espresso maker is having issues with its anti-vacuum device. This valve is designed in order to prevent air from being sucked into the steam wand as it is in operation. You can test this by lowering the wand and listening for a hissing sound. If you hear this noise it is an indication that air is being drawn into the wand and you need to raise the wand to submerge it more fully. You can also test the anti-vacuum by taking off the wand, and cleaning it in warm water with a soft bristled sponge or brush. Cleaning the wand is vital to prevent clogs that could impact your frost. If you are unable to fix it yourself, you can consult a technician or a manufacturer. Control panel The control panel permits users to modify and set up settings. These include coffee strength and volume of milk. These settings can be changed at anytime. The display will indicate when the machine must be descaled, and if the water reservoir is full. The majority of espresso machines come with hot-water dispensers, which are usually in one of the groups, or between them. It can be used to make coffee or to heat cups when needed. This is also great for cleaning and cleaning. Many models have pressure gauges on the front of the machine, which indicate the current pressure of the boiler. A brew switch is also available, which controls both the brew cycle as well as the number of shots. This is important because espresso shot size is determined by the amount of time the grounds are in contact with water. If you wish the switch could be used to start the steaming process. The control system of this espresso machine is outdated however it has easy-to use functionality. italian espresso machine features a narrow LCD screen that appears like an LED. It is easy to navigate through the menus. However, there is a slight learning curve for those new to using espresso machines. The machine's ability to keep an even temperature is impressive. It maintains an ideal temperature of 194deg to the 208 degree F throughout the entire brewing process. This guarantees a perfect aroma extraction and a top-quality cup each time.