Johnson Controls P70CA-63 Pressure Control

The Johnson Controls P70CA-63 is a specialized Single Pole Single Throw (SPST) pressure control engineered specifically for high pressure cutout applications in systems utilizing ammonia refrigerants. This SPST open-high pressure switch operates within a range of 20 to 100 psi, providing critical protection for industrial refrigeration compressors and condenser fan cycling. Constructed with a 316L stainless steel bellows and a plated steel enclosure, the P70CA-63 (identical to the P70CA-63C) resists the corrosive properties of ammonia while maintaining a NEMA 1 rating for durability. The non-adjustable differential ensures precise high-pressure safety cutout set points, preventing equipment damage during over-pressure events. For contractors managing industrial HVACR systems, this ammonia-compatible pressure control offers reliable load switching without the need for additional contactors when loads fall within the contact rating. Designed for direct mounting via a 1/4 inch - 18 NPT female thread, it integrates seamlessly into existing high-side plumbing.

Key Benefits:

• Chemical Compatibility: Features a stainless steel internal sensing element designed specifically for ammonia (R-717) and other non-corrosive refrigerants.
• Versatile Mounting: The P70CA-63 supports universal mounting positions for easier installation in tight mechanical rooms.
• Heavy-Duty Contacts: Equipped with robust SPST snap-action switches that provide high-current capacity for controlling motors and solenoid valves directly.
• Industrial Endurance: Built with a heavy-gauge plated steel cover and case to withstand the rigors of commercial and industrial environments.

Common Questions:

What is the difference between P70CA-63 and P70CA-63C?
The P70CA-63 and P70CA-63C are technically identical units; the "C" suffix typically denotes individual packaging for retail or wholesale distribution but does not change the 20 to 100 psi range or mechanical specifications.

Can this control be used for low-pressure applications?
No, this model is an Open High control, meaning it breaks the circuit on a pressure rise. For low-pressure cutout or suction control, a Close High model would be required.

Is this switch compatible with standard refrigerants like R-404A or R-22?
While the 316L stainless steel bellows is designed for ammonia, it is also compatible with standard non-corrosive refrigerants, though the pressure range is optimized for ammonia high-side monitoring.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.