United Electric Controls H54-22 Diaphragm Pressure Switch

Product Description

The UNITED ELECTRIC CONTROLS H54-22 is a general-purpose diaphragm pressure switch designed for pressure sensing and control in industrial and commercial applications. It features a dual SPDT contact configuration and accepts a wide voltage range including 125 volts AC, 250 volts AC, 480 volts AC, and 24 to 30 volts DC. The 1/4 inch NPT male thread connection provides straightforward integration into existing pressure lines. With an adjustable setpoint and a rated maximum operating temperature of 160 degrees F, this switch suits demanding environments where reliable pressure-triggered switching is required. Installation is handled by licensed electricians and instrumentation technicians.

The H54-22 is suited for use in commercial HVAC systems, compressed air systems, hydraulic circuits, and general industrial process control where diaphragm-type pressure sensing is specified. Its broad voltage compatibility makes it adaptable across multiple control circuit configurations. The 7/8 inch diameter hole electrical connection accommodates standard conduit fittings used in panel and enclosure wiring. The adjustable setpoint allows technicians to dial in the exact trip pressure for a given application without replacing the switch.

Key Features

• Dual SPDT contact form for flexible switching configurations
• Wide voltage rating: 125V AC, 250V AC, 480V AC, and 24 to 30V DC
• 1/4 inch NPT male thread for direct in-line pressure port installation
• Adjustable setpoint for field-calibrated trip pressure
• Rated to 160 degrees F maximum operating temperature
• Certified cUL Listed and cURus Recognized; compliant with UL 508, CSA C22.2, and Pressure Equipment Directive (PED)

Compatibility

Designed as an OEM-style general-purpose diaphragm pressure switch for industrial and commercial control systems requiring 1/4 inch NPT male thread pressure connections and SPDT switching logic.

Installation Notes

Installation should be performed by a licensed electrician or qualified instrumentation technician in accordance with NEC requirements and applicable local codes. De-energize the circuit and depressurize the line before connecting or disconnecting the switch. Use appropriate thread sealant on the NPT connection and verify the torque is sufficient to prevent leaks without over-stressing the port. Confirm setpoint adjustment after installation under live system pressure conditions before returning the system to service.