836-P17-ANCHS | Allen Bradley | Style P Electro-Mechanical Pressure Control Switch

Product Overview

The Allen Bradley 836-P17-ANCHS is a high-performance, definite-purpose electro-mechanical pressure control designed specifically for demanding refrigeration and industrial HVAC applications. This Style P controller manages high-pressure cycles by triggering electrical contacts based on precise refrigerant or fluid pressure setpoints. We supply this unit as 100% Brand New, ensuring factory-calibrated accuracy and long-term mechanical integrity for your thermal management systems.

Technical Specifications

The 836-P17-ANCHS provides a robust interface for high-pressure monitoring with adjustable differential settings.

Engineering Advantages

• Optimized for High-Pressure Refrigerants: The 836-P17-ANCHS handles operating pressures up to 500 PSI and survives surge pressures up to 750 PSI. This specific design accommodates modern high-pressure refrigerants, preventing housing rupture or calibration drift during system pressure spikes.

• Precision Differential Control: The adjustable 35 to 150 PSI differential allows engineers to fine-tune compressor cycling. By widening or narrowing the gap between "cut-in" and "cut-out" points, this switch prevents short-cycling, which significantly extends the life of expensive compressor motors.

• Rugged Electro-Mechanical Actuation: The snap-action mechanism ensures clean electrical breaks, reducing arcing and contact pitting. This physical actuation remains immune to the electromagnetic interference (EMI) that often causes electronic sensors to fail in proximity to high-voltage motor starters.

• Simplified Mechanical Integration: The lightweight 0.83 lbs construction and standard Style P mounting allow for easy installation in compact refrigeration racks or remote manifolds. The mechanical dial interface enables on-site adjustments without requiring specialized digital programming tools or external power.

FAQs

• Can the 836-P17-ANCHS handle non-refrigeration fluids?

  While designed for definite-purpose refrigeration, the 836-P17-ANCHS operates effectively with air, water, and non-corrosive oils, provided the media compatibility aligns with the internal bellows material. Always verify chemical compatibility for non-standard industrial fluids.

• What is the significance of the 750 PSI rating?

  The 750 PSI figure represents the maximum occasional pressure the unit survives without permanent damage. For continuous operation, you must maintain system pressure within the 50 to 500 PSI operating range to ensure setpoint repeatability.

• How do I adjust the differential setpoint during commissioning?

  The unit features independent adjustment screws for the main range and the differential. Use a standard screwdriver to rotate the differential screw until the internal scale aligns with your desired PSI gap. We recommend verifying the final trip points with a calibrated master gauge.

• Does this switch require an external power supply to operate?

  No. The 836-P17-ANCHS uses the physical pressure of the media to actuate the switch. It requires no external voltage for sensing, making it an ideal fail-safe component that operates even during a total control system power loss.