La Marzocco is happy to share with you that new conical valves have been introduced as a standard on the MP configurations of the Linea PB, GS3 & Strada espresso machines. The latest conical valve system has been designed for better and easier control of the infusion, ensuring progressive control of water flow and pressure, with simpler and less frequent planned maintenance. Furthermore, the new system is easier to assemble and does not require further adjustment. The sealing of the valve is achieved by a very precise conical seat rather than o-rings, which ultimately means less maintenance. As with the previous MP valve, pre-infusion is accomplished by restriction of the flow rate. This permits a smooth and gentle wetting of the coffee puck, which remains the peculiarity of the mechanical paddle.
The barista will find the new mechanical paddle more precise in this phase, since the valve is more incremental when performing the pre-infusion, making the extraction yet even more consistent – shot after shot.