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How adjusting my brew pressure fixed everything

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  • #16
    Originally posted by MrJack View Post
    Same thing really. An OPV is a bypass pressure control valve external to the pump.
    Yes- the distinction in a rotary pump machine is that the bypass is normally set to a nominal 9Bar whereas you set the expansion valve to 12 bar- to protect in the case of a faulty bypass. Rocket Espresso actually do it with the vibe pump Giotto PID as well.
    Last edited by TC; 22 April 2016, 08:09 PM.

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    • #17
      Yes Mal that is correct I adjust it via the valve on the rotary. Got to love the simplicity of just reaching under the machine to make the adjustment :thumbup:

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