Correct CO₂ settings help preserve the beer’s flavour and carbonation, keep dispensing consistent and reduce waste. However, no single regulator setting suits every system and beer style.
What carbon dioxide does
Carbon dioxide is already present in beer and contributes to its familiar mouthfeel, gentle bite and foam head. When a keg is connected, the CO₂ cylinder provides the pressure needed to move beer to the tap and helps maintain the gas dissolved in the drink.
The aim is to maintain this balance. If pressure is too low, CO₂ starts coming out of solution. If it is too high, beer can absorb additional gas over time. Both can affect dispensing quality.
Use carbon dioxide intended for food applications as additive E290 to supply a keg.
What determines working pressure
Start with the beer’s temperature and carbonation level. Different beers may need different settings, so follow the brewery’s recommendations.
The dispensing system also matters. Line length and diameter, the rise from keg to tap and the equipment installed affect resistance to flow. Settings used in another shop or at another tap may therefore be unsuitable for your line.
Set working pressure with the regulator. The cylinder valve opens or shuts off the gas supply; it is not used for precise pressure adjustment.
Why beer can foam even with correct settings
When excessive foam appears, a bartender may immediately reduce the pressure. But the cause could be elsewhere: the keg has not cooled down, beer warms up on its way to the tap, a hose is kinked or the beer line needs cleaning.
Pressure that is too low can also increase foaming, as dissolved gas breaks out of the beer inside the line. Repeatedly adjusting the regulator without checking temperature and equipment can make troubleshooting harder.
Start by checking keg cooling, inspecting the hoses and checking line cleanliness. Read our guide to beer dispensing problems for more about possible causes and what to check.
Beer dispensing troubleshooting
What matters when replacing a cylinder
Even a well-adjusted system loses gas if connections leak. After every cylinder replacement, check connections with soapy water or a suitable leak detection product. Growing bubbles indicate a leaking connection.
Secure the cylinder upright and use a serviceable regulator compatible with its valve. Ensure the room is ventilated.
CO₂ for beer dispensing in Oral and West Kazakhstan
OralGazTorg supplies highest-grade carbon dioxide to GOST 8050-85 with a CO₂ content of at least 99.9%, suitable for food applications as additive E290.
You can buy a filled 40-litre cylinder, exchange an empty one for a full one or leave your own for refilling. Before visiting, check availability, prices and expected timing.
