Product Details
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.
| Feature | Specification |
| Manufacturer | Allen Bradley (Rockwell Automation) |
| Model | 836-C9 |
| Pressure Range | 35 to 375 PSI |
| Max Line Pressure | 900 PSI |
| Port Size | 1/4 inch FNPT (Female National Pipe Thread) |
| Enclosure Type | Style C |
| Sensing Element | External Copper Alloy Bellows |
| Weight | 1.65 lbs (0.75 kg) |
Engineering Advantages
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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.
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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.
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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.
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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
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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.
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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.
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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.
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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.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Mastering PLC Programming: Best Practices for Robust Industrial Automation
Writing clean PLC code requires discipline, especially regarding memory management. Avoid overusing SET and RESET instructions, as they often complicate debugging. If multiple rungs control the same bit, troubleshooting becomes a nightmare. Instead, focus on energizing a bit in only one location. If your logic requires complex conditions, use branches within a single rung. This approach keeps your code readable, maintainable, and significantly easier to audit during downtime.
PLC vs. HMI: Distinguishing the Brain from the Interface in Industrial Automation
In the realm of industrial automation, distinguishing between a Programmable Logic Controller (PLC) and a Human-Machine Interface (HMI) is fundamental. While both devices work in tandem, they serve distinct purposes. The PLC acts as the "brain" of the operation, executing logic, whereas the HMI serves as the "eyes," allowing operators to monitor and interact with the system. Understanding this synergy is essential for any professional designing robust factory automation solutions.
Selecting the Right Industrial Automation Solution for Modern Manufacturing
Choosing an effective industrial automation system starts with a thorough process audit. You must identify tasks that are repetitive, labor-intensive, or prone to human error. Not every process requires high-level automation; therefore, prioritize operations that directly impact throughput and quality. By scoping your needs accurately, you avoid over-investing in unnecessary technology. A balanced approach ensures that your capital expenditure aligns with measurable gains in operational efficiency.