Johnson Controls A28AK-2 Temperature Control Refrigerant Effective valve insert mounting is

Effective valve insert mounting is essential to prevent air ingress and leaks

making it a staple in various vintage and modern HVAC control applications

it effectively mitigates common pressure switch faults and eliminates the grinding noise typical of worn-out shaded pole motors

Forta actuators

while exceeding the rating can cause excessive winding current and premature motor failure

Johnson Controls A28AK-2 Temperature Control Refrigerant Effective valve insert mounting isJohnson Controls A28AK 2 Temperature Control, Two Stage, 120 208 240 277 Vac, Flange Mounted, Two SPDT Switches, 60 130 Degree Setpoint Range, 2 Degree Differential Each Stage and 3 Degree Differential Between Stages, Knob Range Adjuster