Johnson Controls P70CA-4 Single Pole Low Pressure Control, Ammonia, SPST

Description

The Johnson Controls P70CA-4 is a single-pole, single-throw (SPST) low pressure control engineered specifically for ammonia refrigeration systems. Designed with a Close High/Open Low switching action, this control reliably monitors and responds to system pressure changes to protect equipment and maintain safe operating conditions in demanding industrial and commercial refrigeration environments.

Key Features

• SPST (Single Pole, Single Throw) switching configuration with Close High/Open Low action
• Wide pressure sensing range: 20″ WC (water column) to 100 PSI
• Adjustable differential range: 6 PSI to 50 PSI for precise system tuning
• 1/4″ Female NPT pressure connector for straightforward field installation
• Maximum overpressure rating of 325 PSIG for robust system protection
• Specifically designed and rated for use with ammonia (R-717) refrigerant

Specifications

• Brand: Johnson Controls
• SKU / Part Number: P70CA-4
• Switch Type: SPST (Single Pole, Single Throw)
• Switching Action: Close High / Open Low
• Pressure Range: 20″ WC to 100 PSI
• Differential Range: 6 PSI to 50 PSI
• Pressure Connection: 1/4″ Female NPT
• Maximum Overpressure: 325 PSIG
• Refrigerant Compatibility: Ammonia (R-717)

Application

The P70CA-4 is ideal for use in industrial ammonia refrigeration systems where reliable low-side pressure monitoring is critical. Its broad pressure sensing range and wide differential adjustment make it versatile for a variety of system configurations, from cold storage facilities to process refrigeration. The 325 PSIG maximum overpressure rating ensures the control can withstand pressure spikes common in ammonia systems without compromising safety or performance.