Johnson Controls P70KA-7 Manual Reset Ammonia Refrigerants Open high Pressure Switch 50/450 PSI

The Johnson Controls P70KA-7 is a Manual Reset Pressure Switch made to be used with ammonia refrigerants in HVAC systems. This switch comes with a pressure range of 50-450 psi to ensure that high pressure is well-regulated to protect the machines and enhance safety. This is an example of the “Open High” principle and has a preset upper limit for pressure after which it has to be reset by hand. This mechanism is critical in preventing the overpressurization of compressors and condensers, two key HVAC components, and thus preserving the reliability of the system over its useful life.