Ranco O16-503 High Pressure Refrigeration Control SPDT 150-450 PSI

The Ranco O16-503 is a high-pressure refrigeration control designed to protect air conditioning and refrigeration systems from excessively high discharge pressure conditions. This control automatically monitors system pressure and activates protective functions to prevent equipment damage.

Key Features:

• Pressure range: 150 to 450 PSI operating range
• Adjustable differential: 40 to 150 PSI
• SPDT (Single Pole Double Throw) switch contacts for versatile wiring configurations
• Automatic reset function for convenient operation
• 1/4" SAE male flare nut pressure connection
• Adjustable set points via range adjustment and differential screws

This pressure control is commonly used for starting and stopping refrigeration compressors, controlling fans on air-cooled condensers, and various pneumatic and hydraulic applications. The automatic reset feature allows the control to cycle back into operation once pressure levels return to normal operating range, eliminating the need for manual intervention.