Kees Van Der Westen Speedster Coffee Machine
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,gravity=Center,allowExpansion)
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,gravity=Center,allowExpansion)
,gravity=Center,allowExpansion)
,gravity=Center,allowExpansion)
,gravity=Center,allowExpansion)
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Features:
Construction:
The Speedster has 2 boilers.
The coffee water boiler is made from 3mm stainless steel tube and 6mm thick flanges. The steam-hot water boiler is done in 2mm stainless tube with 6mm flanges.
There is a large hole on top of the coffee water boiler on which the group is installed. The group is made in 4 and 5mm stainless. The group is welded, also onto the boiler. The welding is done both on the outside as well as the inside to prevent crevices which may cause corrosion. The neck of the boiler is situated vertically to allow for a proper constant thermo-siphon heat flow inside, reaching the full length and height of the group. Both the cover as the bottom of the group are removable, sealed by o-rings.
The entire frame is made from 3mm stainless steel, including the black powder coated parts. Body work is in 1mm stainless, drain tray in 2mm.
Steamboiler
The rear steam boiler has a total capacity of 3.5 litre. An electronic temperature controller gets it information through a very precise and fast reacting probe, located in the steam, and activates the heating element via a solid state relay. The heating element provides a powerful 1.800Watt. This is divided over two elements of 900Watt each, mounted on one flange. There are no moving parts in the heating system.
The steam valve has a large knob, stainless steel wand and a steam tip with 4 holes in fan-shape, each with a diameter of 1,2mm.
Activation of the hot water is done by a switch. The large manual valve on the machine is empty inside, only providing a connection between inner tube and outside wand, visually symmetric to the steam valve.
Two different hot water temperatures can be supplied by one toggle switch.
Inside the machine hot water running from the steam/hot water boiler towards the hot water valve is directed first through a mix manifold. On this manifold 2 solenoid valves are installed, one for hot, one for cold water. The cold water flow is restricted by a 0,6mm jet. Pushing downwards the long lever toggle switch activates both solenoid valves and the pump, resulting in a quiet flow of hot water with a temperature of just below boiling point. When the lever of the toggle switch is pulled upwards, only the hot water solenoid is activated. This results in hot boiling water flowing directly from the boiler to the wand.
Coffeeboiler
The cold water entering the machine is first directed through a heat-exchanger located inside the steam boiler. Exiting the heat-exchanger its temperature is higher than needed. It is cooled down by flow-crossing the outgoing hot water with the incoming cold water and running through an extra long tube outside the boiler before entering the coffee water boiler.
At entering the coffee boiler it first travels through an internal tube over the entire length of the boiler.
The temperature of the coffee water is measured and controlled by a highly sensitive probe connected to a PID (Proportional, Integral, Derative) controller. This controller activates the 900Watt heating element via a solid state relay. There is no moving part in the entire heating and controlling system. This ensures an extremely fast reacting system as well as a very reliable one. The PID functions almost make this controller intelligent. It learns from past behavior and actually responds ahead. This results in an very precise temperature management by short pulse activation of the heating element. The brew water temperature can easily be adapted by just pushing a button at the front of the machine. It is adjustable to 0.1 degrees Celsius.
The group
The group is self-bleeding.
Air can be compressed, water cannot. It is important all air is driven out from the coffee boiler. This is done automatically when the brewing lever is used for the first time after installation.
After going to great length to achieve a perfectly exact stable temperature it is important the water does not lose any of its heat, until it reaches the coffee ...
Estimated Delivery Time Frame:2-7 business days
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Reference ID: 13782693