QPL32.200M00 Siemens Gas Pressure Switch

Overview

The Siemens QPL32.200M00 is a manual reset gas pressure switch designed for the supervision of air or gas pressures in commercial and industrial burner applications. This robust switch is engineered to detect low-pressure conditions, ensuring safety by breaking the electrical circuit if the pressure falls below the adjusted setpoint. Built for versatility and durability, it features a NEMA 4-rated enclosure, making it suitable for both indoor and outdoor installations, and is compatible with a wide variety of gases, including natural gas and hydrogen mixtures.

Features

• Manual reset mechanism requires physical intervention once a low-pressure state is triggered
• NEMA 4 protection rating provides resistance against dust and moisture for outdoor use
• Built-in side test connection allows for easy monitoring with a manometer or pressure gauge
• Gold-plated contacts come standard to ensure reliable switching for both high and low voltage applications
• Ventless operation capability up to 7 psig for simplified installation
• Compact design with 1/2-inch flexible conduit fittings for straightforward mounting

Specifications

• Pressure Range: 40 to 200 inches water column (wc)
• Maximum Operating Pressure: 15 psig
• Ventless Operation Limit: 7 psig
• Operating Temperature: -40 F to 140 F (-40 C to 60 C)
• Gas Compatibility: Natural gas, propane, butane, hydrogen, biogas, and air
• Electrical Rating: 24 to 125 VAC or 24 to 48 VDC
• Connection: 1/4-inch NPT pressure connection

Applications

• Low gas pressure supervision in industrial and commercial burner systems
• Monitoring of air or gas pressures in gas trains for boilers, furnaces, and ovens
• Safety shut-off systems requiring manual acknowledgement of pressure drops
• Use in environments containing dry, non-condensing gases such as hydrogen or biogas mixtures