UNITED ELECTRIC CONTROLS J21KX-140 DIFFERENTIAL PRESSURE SWITCH NSNBC7

Description:

The United Electric Controls J21K-S150B Differential Pressure Switch is used in industrial process control, filtration systems, HVAC equipment, and fluid handling applications to monitor differential pressure and provide automatic electrical switching when preset pressure differential conditions are reached. Commonly installed in filter banks, air handling units, clean rooms, process piping systems, and industrial automation equipment requiring reliable differential pressure monitoring. Maintenance teams and system integrators use this part for repair, retrofit, expansion, or replacement of existing pressure sensing and control systems.

Applications:

The United Electric Controls J21KX-140 Differential Pressure Switch is commonly used in filter monitoring systems, air flow verification, pump protection circuits, ventilation equipment, process control installations, and industrial safety systems. The switch converts differential pressure changes into electrical switching actions for alarms, shutdown functions, maintenance indication, and automatic process control, helping maintain safe and efficient operation of critical industrial equipment.

Technical Specifications:

• Brand: United Electric Controls
• Part Number: J21KX-140
• Product Type: Differential Pressure Switch
• Series: J21KX Series
• Switch Type: Differential Pressure Switch
• Function: Differential Pressure Monitoring and Control
• Pressure Sensing Element: Dual Diaphragm/Bellows Assembly
• Output Contacts: SPDT Snap-Action Switch
• Electrical Rating: 15A @ 125/250/480 VAC Resistive
• Setpoint Adjustment: Internal Adjustable Differential Setpoint
• Repeatability: Industrial Process Control Accuracy
• Enclosure Type: NEMA 4X Weatherproof Housing
• Housing Material: Epoxy-Coated Die-Cast Aluminum
• Pressure Connections: Dual Pressure Ports (High and Low Side)
• Suitable for Air, Water, Oil, and Compatible Non-Corrosive Fluids
• Designed for Alarm and Shutdown Applications
• Compatible with Filtration, HVAC, 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-S150B Pressure Switch
• United Electric Controls J120-616 Pressure Switch
• United Electric Controls H122 Series Pressure Switch