836T-T252JX20 Allen Bradley

The 836T-T252JX20 is a rugged, externally adjustable electromechanical pressure control switch from the Allen-Bradley Bulletin 836T series. It is designed to open or close electrical circuits in response to changes in pneumatic (air or gas) or hydraulic (oil or non-corrosive liquids) pressure.

📊 Product Parameters (Specifications)

Note: The “X20” in the part number indicates the $5$-pin Mini-Type receptacle and J9 wiring option, which differentiates it slightly from the base 836T-T252J model.

✨ Product Advantages (Key Features & Benefits)

• Robust Construction: Built with durable materials, including a copper alloy bellows, to withstand harsh industrial environments, including those with vibration and temperature fluctuations.
• External Adjustability: The operating range and differential are independently and externally adjustable (though differential may require cover removal), allowing for precise calibration to meet specific system requirements.
• Reliable Control: Provides accurate and repeatable pressure regulation, which is critical for maintaining process efficiency and preventing system damage.
• Versatility: Suitable for use with air, water, oil, non-corrosive liquids, vapors, and gases.
• Standardized Integration: Works seamlessly with other Allen-Bradley control systems and industrial automation solutions.
• Sealed Enclosure: The NEMA Type $4$ and $13$ rating ensures protection against dust, dirt, spraying water, and non-corrosive coolants, making it suitable for machine tool environments.

⚠️ Precautions (Important Considerations)

• Media Compatibility: The copper alloy bellows are suitable for non-corrosive media like air, water, and oil. Do not use with corrosive liquids or gases that may damage the copper alloy.
• Pressure Limits: Always ensure that the system’s operating and occasional surge pressures do not exceed the $200$ psi Maximum Line Pressure to prevent damage to the bellows and device.
• Electrical Wiring: Ensure proper wiring according to the J9 wiring reference for the $5$-pin mini-type receptacle. Incorrect wiring can damage the switch or compromise safety.
• Enclosure Integrity: For NEMA Type $4$ and $13$ protection, ensure the cover is properly sealed and the cable connection (receptacle) is secure.
• Adjustment: When adjusting the operating range and differential, refer to the manufacturer’s technical documentation for the correct procedure to ensure accurate and reliable operation.

⚙️ Product Applications (Typical Uses)

The Allen-Bradley Bulletin 836T Pressure Controls are primarily used in the traditional machine tool and transportation industries.

Common applications include:

• Hydraulic Systems: Monitoring and controlling the pressure of hydraulic oil in machinery like presses, clamps, and lifts to ensure safe and consistent operation.
• Pneumatic Systems: Maintaining a preset pressure range in air compressors, braking systems, and pneumatic actuators.
• Pumps and Compressors: Used as a safety cutoff or on/off control for maintaining reservoir pressure within defined limits.
• Filtration Systems: Detecting pressure drops across filters to indicate clogging or the need for maintenance.