COFFEE – EQUIPMENT

Espresso Machines Forces precisely heated water under

pressure, through carefully ground and packed coffee grinds.

Extracts coffee oils that are responsible for the full flavour, body and aroma.

Over-extraction bitter, thin-tasting drink with aroma of a dirty ashtray.

Types of machines Level or spring piston machine just after WWII. Manual machine 1960s, uses hydraulic

pressure to force water through coffee grinds. Time dictated by Barista.

Semi-automatic machine most common, ca programme amount of water.

Automatic machines has in-built coffee grinder. Will dispense coffee grinds and brew it. Some even dispense frothed milk.

Components of an Espresso machine.

Drain tray Steam arm Manometer Steam valve lever Hot water lever

The Grinder Hopper Burrs Grounds chamber Dose handle Tamper Yoke

Cross-section of machine Pump Boiler Heat Exchanger Group Head Dispersion Screen

Porta-filter or Filter-basket Porta-filter Filter Inserts Spouts Retaining Clip

Other methods. Filter coffee Plunger or pressed coffee Stove-top espresso pots Turkish coffee pots – inverted cone with

narrow mouth at top, powdered coffee, sugar and water and boiled in pot.

Presenting coffee Correct, warmed vessel customer

expectations Clean and damage-free service vessel,

no drips of spillage.

END