QPB32.200A00 Siemens Gas Pressure Switch

Overview

The Siemens QPB32.200A00 is an automatic reset gas pressure switch designed to monitor high or low pressure conditions in commercial and industrial combustion systems. Part of the QPx32 series, it is compatible with a variety of gases including natural gas, propane, butane, hydrogen, and biogas, as well as air. This versatile switch can be configured to function as either a high-pressure or low-pressure supervisor and is commonly utilized for automatic leak testing of safety shutoff valves.

Features

• Automatic reset mechanism returns the switch to active monitoring once standard pressure is restored
• Dual-purpose design allows for use as either a high or low pressure switch depending on wiring configuration
• NEMA 4 rated enclosure ensures durability in outdoor and harsh industrial environments
• Ventless operation capability up to 7 psig
• Built-in side test connection for convenient manometer or pressure gauge attachment
• Form C switch contacts for reliable electrical signaling
• Compatible with hydrogen and hydrogen-natural gas mixtures

Specifications

• Pressure Range: 40 to 200 inches water column
• Maximum Operating Pressure: 15 psig
• Ventless Pressure Limit: 7 psig
• Enclosure Rating: NEMA 4
• Operating Temperature Range: -40 F to 140 F
• Electrical Rating: 24 to 125 VAC or 24 to 48 VDC
• Pressure Connections: 1/4 inch NPT positive and 1/8 inch NPT vent/negative
• Materials: Die cast aluminum lower body with fiberglass reinforced plastic upper body

Applications

• High or low gas pressure supervision for industrial and commercial burners
• Valve proving systems and automatic leak testing for safety shutoff valves
• Gas train monitoring in boilers, furnaces, and industrial ovens
• Air pressure proving for exhaust and recirculation fans
• Combustion systems requiring outdoor-rated safety components