AXV

AXV I is a constant pressure regulator and it is designed to maintain a constant evaporating pressure during all running conditions. As the pressure in the evaporator changes, the valve opens or closes to control refrigerant flow into the evaporator. This function allows it to be used as either an injection or hot gas bypass valve.
AXV H capacity hot gas bypass valve adapts compressor capacity to actual evaporator load in applications operating at an evaporating temperature of around 0 °C. Fitted in a bypass between the high and low-pressure sides of the refrigeration system. AXV H maintain compressor suction pressure by injecting hot gas/cool gas from the high-pressure side.
AXV I as injection function that controls the refrigerant flow based on the evaporator pressure instead of amount of superheat at the outlet of the evaporator. This allows its bulbless design.