Beer that pours foamy is usually a temperature problem before it is a gas problem. JRC services keg boxes, walk in beer coolers and back bar refrigeration for bars and restaurants throughout Bell, CA.
Draught beer wants a steady 36 to 38 degrees through the whole run. A keg box that swings, or a glycol chiller that is short of capacity, produces exactly the foaming that bar staff then chase with CO2 pressure adjustments that make it worse. We check box temperature stability, glycol bath and pump operation, trunk line insulation and the tower cooling before anyone touches the regulator. Back bar coolers get the usual condenser, gasket and fan motor attention.