{"product_id":"rocket-coffee-machine-expansion-valve-re-c229900911","title":"Rocket Espresso Expansion Valve 10-14 Bar – RE-C229900911","description":"\u003ch2\u003eRocket Espresso Expansion Valve – Adjustable 10–14 Bar (RE-C229900911)\u003c\/h2\u003e\u003cp\u003eThis is a genuine OEM replacement expansion valve (also known as an over-pressure valve or OPV) for Rocket Espresso machines. The expansion valve regulates the maximum brew pressure in the hydraulic circuit — when pressure exceeds the set point, the valve opens and diverts excess water back to the reservoir or drain. This is a critical component for maintaining consistent 9-bar extraction pressure and protecting the pump from over-pressure damage.\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePart number: RE-C229900911\u003c\/li\u003e\n\u003cli\u003ePressure range: Adjustable 10–14 bar\u003c\/li\u003e\n\u003cli\u003eHose end connection: ø 7mm\u003c\/li\u003e\n\u003cli\u003eMaterial: Brass CW510L (OT57)\u003c\/li\u003e\n\u003cli\u003eLead content: Low lead\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCompatible Rocket Espresso Machine Models\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAppartamento:\u003c\/strong\u003e 2017, from 2021-04, from 2023-04, TCA (from 2024-10)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBicocca:\u003c\/strong\u003e from 2024-07\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGiotto:\u003c\/strong\u003e 2009, Evoluzione 2 2017, Evoluzione V2 2013, Cronometro R (from 2019-08), Cronometro V (from 2019-08)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMozzafiato:\u003c\/strong\u003e Evoluzione R, Evoluzione V, Cronometro R (from 2019-08, from 2023-04), Cronometro V (from 2019-08, from 2023-04), Fast R (from 2025-01), Fast V (from 2025-01)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorta Via:\u003c\/strong\u003e from 2020-08\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR58:\u003c\/strong\u003e 2015, from 2018-02, from 2023-09\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR60V \/ R 60V:\u003c\/strong\u003e from 2018-02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR8V:\u003c\/strong\u003e from 2017-11\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR Cinquantotto:\u003c\/strong\u003e from 2021-08, from 2024-10\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eR Nine One:\u003c\/strong\u003e all variants including from 2020-09, from 2022-11\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eCheck your machine’s model and production date on the serial plate (base or rear panel). If unsure, contact our technicians with your serial number before ordering.\u003c\/p\u003e\u003ch3\u003eWhen Should You Replace the Expansion Valve?\u003c\/h3\u003e\u003cp\u003eReplace this valve if your Rocket Espresso machine is showing any of the following: brew pressure consistently above or below 9 bar and not correctable by adjustment, water leaking from the OPV body or hose connection, the valve not returning to seat after pressure release, or a damaged or corroded valve body.\u003c\/p\u003e\u003ch3\u003eHow to Adjust the Expansion Valve\u003c\/h3\u003e\u003cp\u003eThe expansion valve is adjustable between 10 and 14 bar. To set your desired brew pressure, use a portafilter-mounted pressure gauge and adjust the valve’s set screw — clockwise to increase pressure, counter-clockwise to decrease. Most home baristas target 9 bar at the group head, which typically requires the OPV set slightly above this to account for line losses. If you are not confident making this adjustment, Bear Coffee Machine can calibrate it during a service.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat is an expansion valve (OPV) and why does it matter?\u003c\/strong\u003e The over-pressure valve (OPV) limits the maximum pressure the pump can deliver to the group head. Setting it correctly is essential for dialling in 9-bar extraction — too high and you risk over-extraction and channelling; too low and shots will be weak and under-extracted.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs this a genuine Rocket Espresso part?\u003c\/strong\u003e Yes — this is an OEM-specification valve using the original Rocket part number RE-C229900911, made from low-lead brass CW510L.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan Bear Coffee Machine adjust or replace this valve for me?\u003c\/strong\u003e Yes — we offer in-house repair and servicing for Rocket Espresso machines. Contact us to arrange a booking.\u003c\/p\u003e","brand":"Bear Coffee Machine ","offers":[{"title":"Default Title","offer_id":46080025723076,"sku":null,"price":55.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/6632\/8260\/files\/rocketexpansiovalve.jpg?v=1776863931","url":"https:\/\/bearcoffeemachine.com.au\/zh\/products\/rocket-coffee-machine-expansion-valve-re-c229900911","provider":"Bear Coffee Machine ","version":"1.0","type":"link"}