United Electric Controls J21K-232 Differential Pressure Switch 0-25psid 9559

Description:

The United Electric Controls J21K-232 Differential Pressure Switch is used in industrial pressure monitoring systems to detect differential pressure changes and provide automatic electrical switching when preset pressure differentials are reached. Commonly installed in filtration systems, hydraulic equipment, lubrication systems, pump monitoring assemblies, HVAC equipment, and industrial process machinery requiring reliable differential pressure control and equipment protection. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of existing differential pressure sensing and control systems.

Applications:

The United Electric Controls J21K-232 Differential Pressure Switch is commonly used in filter condition monitoring, pump protection systems, lubrication circuits, heat exchanger monitoring, flow verification systems, and industrial alarm applications. The switch utilizes a differential pressure sensing mechanism to measure the pressure difference between two process points and actuate electrical contacts for alarms, interlocks, shutdown functions, and automatic process control, helping maintain safe and efficient operation of critical industrial equipment.

Technical Specifications:

• Brand: United Electric Controls
• Part Number: J21K-232
• Alternate Part Number: 9559
• Product Type: Differential Pressure Switch
• Series: J21K Series
• Switch Type: Electromechanical Differential Pressure Switch
• Differential Pressure Range: 0 to 25 PSID
• Differential Pressure Range Metric: 0 to 1.72 Bar Differential
• Function: Differential Pressure Monitoring and Control
• Sensing Element: Differential Diaphragm Assembly
• Output Contacts: SPDT Snap-Action Switch
• Contact Rating: 15A @ 125/250/480 VAC
• Setpoint Adjustment: Adjustable Differential Pressure Setpoint
• Deadband: Adjustable Differential
• Pressure Connections: Dual 1/4 in. NPT Female Ports
• Electrical Connection: Conduit Entry
• Enclosure Type: Industrial-Duty Housing
• Housing Material: Die-Cast Aluminum Construction
• Repeatability: High Accuracy Industrial Switching
• Suitable for Air, Gas, Oil, Water, and Compatible Process Fluids
• Designed for Alarm and Shutdown Applications
• Compatible with Filters, Pumps, Heat Exchangers, Hydraulic Systems, and Process Equipment
• Intended for OEM Equipment and Replacement Installations
• Suitable for Maintenance, Retrofit, and Repair Projects
• Engineered for Continuous-Duty Industrial Service

Common Replacements:

• United Electric Controls J21K-455 Differential Pressure Switch
• United Electric Controls 2W2D00K10 Differential Pressure Switch
• United Electric Controls J402K-455 Differential Pressure Switch