Allen Bradley 836-C9 Style C External Bellows Industrial Pressure Switch

Product Overview

The Allen Bradley 836-C9 operates as a heavy-duty industrial pressure switch designed for precise control in pneumatic and hydraulic systems. This Style C device utilizes an external copper alloy bellows to actuate electrical contacts when system pressure reaches pre-defined setpoints. We supply this unit as 100% Brand New, ensuring factory-calibrated accuracy for critical safety interlocks and process automation.

Technical Specifications

The 836-C9 combines a broad operating range with high surge tolerance to accommodate volatile industrial environments.

Engineering Advantages

• Superior Media Compatibility: The external copper alloy bellows resists corrosion and fatigue when exposed to non-corrosive liquids and gases. This material choice ensures a long service life even in systems prone to frequent pressure fluctuations.

• High Surge Protection: While the switch operates within the 35–375 PSI range, the internal architecture withstands line pressures up to 900 PSI. This safety margin prevents mechanical failure and recalibration requirements following system pressure spikes or "water hammer" events.

• Precise Mechanical Switching: The Style C design provides high repeatability for critical setpoints. The mechanical snap-action contacts eliminate the "hunting" behavior often found in low-quality electronic sensors, providing a definitive electrical signal to your PLC or motor starter.

• Standardized Integration: The 1/4 inch FNPT port allows for direct mounting or connection via standard industrial fittings. This universal threading simplifies the replacement of older units and allows for easy integration into existing manifold blocks without custom adapters.

FAQs

• Can the 836-C9 handle corrosive chemical applications?

  The 836-C9 utilizes copper alloy for its bellows. You must verify that your process media does not react with copper. For ammonia or highly acidic environments, consult the 1756 or 836 series stainless steel variants to prevent bellows rupture.

• Is the pressure setpoint adjustable?

  Yes. The 836-C9 allows for manual adjustment of the trip point within the 35 to 375 PSI range. Use the internal adjustment screws to calibrate the switch to your specific process requirements.

• What mounting orientation provides the best performance?

  While the 836-C9 functions in multiple orientations, mounting the unit vertically with the pressure port facing downward prevents sediment and moisture from accumulating in the bellows, thereby extending the maintenance interval.

• Does this switch require a separate power supply for sensing?

  No. The 836-C9 is an electro-mechanical device. The pressure of the process fluid physically moves the bellows to trip the electrical contacts. It operates without external power, making it an ideal choice for fail-safe hardwired interlocks.