On this product page you will find a variety of pressure switches and pressure sensors. One of most generic spare parts on a espresso machine is the Pressure switch. A pressure switch is used to control the electricity going to the heating element, when the boiler is in a certain pressure reach it will switch the element on or off. At some point a pressure switch was installed on every espresso machine made, nowadays you see that with the introduction of the thermal PID that some manufacturers don’t use them anymore for some models.
Below the parts you will find additional information about the types of pressure switches, their working and in which specifications they are used on espresso machines.
On this product page you will find one of the most commonly used pressure switches. The Ma-Ter XP110 pressure switch. This pressure switch is rated from 0,5bar up to 1,5bar. The pre-calibrated pressure is 1 bar. The brass fitting has a male ¼” BSP-G thread on it. This switch is rated to 16A at 125/250V.
This pressure transducer is used by Nuova Simonelli and Victoria Arduino (the same company). The item is being used on the Victoria Arduino Adonis, Victoria Arduino Black Eagle, Victoria Arduino VA358 White eagle and on the Nuova Simonelli Aurelia II
The pressure switch on this product page is used on various Astoria and Wega espresso machines. This OEM/Original spare part has the Astoria part reference number 20158 and the Wega part reference number WY20158. This pressure switch is the ES31. It has been pre-set at 1,5bar. The fitting on the bottom is a 1/8” male thread. It is fitted with...
The pressure switch on this page is specifically used on the Rancilio Classe 5 espresso machines. This specific model of pressure switch is made by the Italian company Asco/Sirai and it is the model P302/6. The Rancilio part reference number for this pressure switch is 34200356. This pressure switch has CE and UL approval. It has a adjustable...
The item on this page is a pressure switch which can be used on the Nuova Simonelli Oscar espresso machines. The Nuova Simonelli part reference number for this item is 09200014. This pressure switch has a male connection of ¼”. The switch is fixed at 1,4 bar and it is rated at 16A at 250V. This switch has been made in Italy.
Which type of pressure switch/sensor you need for your espresso machine depends on various factors such as the brand, Type, fitting, voltage, phases, amperage, pressure reach and adjustability. Seen all these factors above can influence the working of your espresso machine.
There are 2 types of pressure switch, the analogue model and the digital pressure sensor. The digital pressure sensor can be found on various espresso machine brands such as Rancilio, La Cimbali, Nuova Simonelli, Astoria, Wega and Victoria Arduino. Some brands do use a combination of both on various models. Where the “high end” versions use pressure switches and the less economic models a pressure switch.
There are a variety of manufacturers of pressure switches such as Asco(Sirai), Parker and Ma-ter. The brands https://brooks-parts.com/gb/asco-sirai-pressure-switch-p302-6Asco and Parker are mainly known for the use of them in commercial espresso machines. Where the Ma-ter pressure switches are mostly used in domestic espresso machines, especially the XP110 versions.
The rated amperage of the pressure switch does depends on the model used. For instance on the Ma-ter pressure switches this is 16A, so in the situation with 230V you would be able to control 16x230=3680W single phase. Seen there is only one connection for the live wire.
The commercial grade pressure switches, made by Asco and Parker can do between 20 and 30 amps of power. Some have single phase, so one connecting place. But other such as the famous Asco/Sirai pressure switches are made for 3 phase and have a max capacity of 30A.
The fitting on traditional pressure switches is a 1/8” BSP-G or a ¼”BSP-G. The ¼” is the most common version for pressure switches, seen they are less likely that they will break off. The 1/8” BSP-G size is found on some of the smaller Ma-ter XP110 pressure switches.
For pressure sensors this can range from a 3/8” thread to a non threaded connection, but that the sensor is held in place with screws.
The pressure reach does depend on one important question. Is the pressure switch adjustable? Seen not all pressure switches are adjustable, some have a fixed pre-set pressure. But with most analogue pressure switches the pressure can be changed by turning a screw clock or counter clockwise.
For instance the Parker and asco 3 phase pressure switch has a range of 0,5-1,4 bar, but there are also versions of the 3 phase models which start at 0,9 bar and have a high point at 1,7bar.
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