Can I use this with R134a since R12 is discontinued

What are the open and close set points

this switch provides reliable differential pressure

Normally Open Operation: Ideal for systems requiring a default open state for cooling or safety bypass during power loss

Kunkle Valve 6010HGM01AAM0150 Valve 30067439-890 Can I use this withThe Kunkle Valve 6010HGM01AAM0150 is a high performance ASME Section I steam safety valve engineered for critical overpressure protection in boiler systems and pressure vessels. This valve serves as the direct updated replacement for the legacy 6010HGM01 AM0150 model, maintaining a precise factory set pressure of 150 PSI. Built with a heavy duty bronze body and a rugged stainless steel spring, it features a 1. 5 inch MNPT inlet and a 2 inch FNPT side