QPH32.200M00 Siemens Gas Pressure Switch

Overview

The Siemens QPH32.200M00 is a high-precision gas pressure switch designed for the supervision of gas or air pressures in commercial and industrial burner applications. This manual reset model is specifically engineered to detect high-pressure conditions, ensuring safety by breaking the electrical circuit when the pressure exceeds the pre-set adjusted value. Built for durability and reliability, it features a NEMA 4 rating, making it suitable for both indoor and outdoor installations where robust pressure management is required.

Features

• Manual reset mechanism locks the switch in the tripped state until manually cleared
• High-pressure supervision ensures system safety during overpressure events
• NEMA 4 rated enclosure provides protection against dust and water for outdoor use
• Ventless operation capability up to 7 psig (500 mbar)
• Compatible with a wide range of gases including natural gas, propane, butane, hydrogen, and biogas
• Built-in side test connection for easy attachment of manometers or pressure gauges
• FM approved and cULus listed for use in industrial heating and burner systems

Specifications

• Model: QPH32.200M00
• Pressure Range: 40 to 200 inches water column (wc)
• Maximum Operating Pressure: 15 psig (1 bar)
• Minimum Operating Temperature: -40 F (-40 C)
• Maximum Operating Temperature: 140 F (60 C)
• Electrical Rating: 24 to 125 VAC; 24 to 48 VDC
• Pressure Connection: 1/4 inch NPT (+) and 1/8 inch NPT (-)
• Materials: Die-cast aluminum lower body with fiberglass-reinforced plastic upper body

Applications

• Monitoring high gas or air pressures in gas trains for industrial furnaces and ovens
• Safety shut-off integration for commercial and industrial gas-fired burners
• Use in HVAC systems to prove airflow or monitor duct pressure conditions
• Suitable for systems utilizing hydrogen or hydrogen-natural gas mixtures
• Integration into boiler control systems for overpressure protection