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VBM Vibration Pump Opv Kit €31.99
This OPV (Over Pressure Valve) is a wonderful and inexpensive modification for any machine with a vibration pump.
This OPV enables you to reduce and adjust the pump pressure. Vibration pumps produce approx 15-18 bar - fitting an OPV drops it to 9/10 bars approx.
Some machines may be set to a higher extraction pressure - those that come with pressurized baskets will typically extract at 12-15 bars. Finely ground espresso tastes better when extracted at 9 bars, using non-pressurized baskets - greater crema and body are achieved.
Fit most vibration pumps, with a little fitting.
Kit comes with:
How to fit the vibration pump bypass valve.
💡This valve will add an extra 35mm (1.5' inch) to the length of the pump and the adjustment part will stick out 50mm approx. So you will need the internal room inside the machine to add this modification.
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Blær from Iceland asks
Hello! Wonderful upgrade, but I don't have a pressure gauge, so I'm having some trouble finding 9.5 bars. I was wondering how low does the pressure go and how high, so I can "aim" the screw? :) Thanks in advance!
Javier from Mexico asks
Hello! Has this valve been successfully used in a Breville Barista Express machine? Could it work to replace the stock OPV and reduce the output pressure?