Ranco O16-200 Pressure Control

The Ranco O16-200 is an industry-standard single high pressure control engineered for critical system monitoring in commercial refrigeration and HVAC applications. This SPDT pressure switch features a wide pressure range of 150 to 450 PSI, making it ideal for head pressure control or high-limit protection in systems utilizing R12, R22, or R502. The unit is equipped with a manual reset mechanism, ensuring that the system remains locked out after a high-pressure event until a technician can verify the cause of the trip. Reliability is bolstered by a 48-inch capillary with flare nut (1/4" SAE) and the proprietary Super Cap capillary protection system, which utilizes a specialized vibration cone to significantly reduce mechanical stress on brazed joints. With its NEMA 1 enclosure, heavy-duty plated steel frame, and laser-welded bellows, the O16-200 provides consistent setpoint accuracy and extended service life for high-side discharge sensing in demanding environments.

• Universal Mounting: Compact design with a heavy-duty steel frame allows for easy installation in various orientations within tight mechanical cabinets.
• System Protection: The manual reset feature prevents short-cycling after high-pressure trips, protecting compressors from potential failure.
• Enhanced Durability: Incorporates laser-welded bellows and the Super Cap vibration protection to withstand high-pulsation discharge lines.
• Clear Instrumentation: Features a high-visibility, large scale plate for precise adjustment of the 150–450 PSI setpoints in the field.
• Multi-Refrigerant Compatibility: Fully suitable for legacy and common service refrigerants, providing a versatile pressure control solution for older equipment.

What is the fixed differential for the Ranco O16-200?
This high-pressure limit control operates with a fixed differential of approximately 40 PSI. Once the manual reset is engaged following a trip, the system pressure must drop by at least this amount before the reset button can be successfully depressed.

Can the O16-200 be used as a direct replacement for other brands?
Yes, the Ranco O16-200 is a common cross-reference for the Honeywell P422B and Johnson Controls P70DA-1. Its universal mounting bracket and standard 1/4" SAE flare nut connection simplify the replacement process on most condensing units.

How does the Super Cap technology prevent leaks?
The Super Cap system uses a low-mass copper alloy capillary and a vibration-absorbing cone at the connection point. This design isolates the sensing element from the high-frequency vibrations typically found on the discharge side of the compressor, preventing fatigue-related refrigerant leaks.

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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.