Superkop pressure, easy to handle

The Science of 9 bar of pressure

Introduction

Superkop helps you make perfect espresso coffees with ease. The Superkop espresso tool is a manual lever espresso tool and is unique because the lever handle is connected to a ratchet system such as you see with 4WD cars to lift them out of trouble. This tried mechanism easily lets you create the 9 bar pressure you need for the perfect espresso.

So what does 9 Bar mean

9 Bar is 129.999935 pounds per square inch which equates to 896317.9999308 Pascal (Newton / Square meter) or 896.3 kN/m²

On earth 1 N = 0.102kg(*m/s²). So 896.3 kN/m² equates to 91,424.334 kg/m²

How does 9 Bar relate to Superkop

The Superkop water reservoir opening has the form of a circle.

The diameter of the water reservoir equals that of the plunger and is 48mm which is 0.048m

The Radius r = 0.5 * Diameter which is 0.024m

The surface Area of the reservoir is pi * r² which is 3.14 * 0.024² which gives 0.00180864 m²

So the number of kilograms necessary to create 9 bar of water pressure in the Superkop reservoir is: 91,424.334 kg/m² * 0.00180864 m²= 165kg

Finalizing

You can imagine how hard it is to put 165kg on top of a plunger without leverage from a lever and a ratchet system.

Once you pull your Superkop espresso you will understand why we say: “Superkop is easy to handle”.