QPL32.020M00 Siemens Gas Pressure Switch

Overview

The Siemens QPL32.020M00 is a manual reset gas pressure switch designed for monitoring gas or air pressures in industrial and commercial burner systems. Part of the QPx32 series, this low-pressure switch is engineered to detect when pressure falls below a predetermined setpoint, providing a critical safety function by initiating a shutdown or alarm. It is compatible with natural gas, propane, butane, hydrogen, biogas, and air, making it a versatile component for various combustion applications.

Features

• Manual reset mechanism requires physical intervention after a pressure drop for enhanced safety
• Suitable for low-pressure supervision of gas and air
• NEMA 4 rated enclosure provides protection against dust and water, suitable for outdoor use
• Integrated ventless operation capability up to 7 psig
• Compact and robust design for easy integration into gas trains
• FM approved and UL listed for safety and reliability

Specifications

• Pressure Range: 2 to 20 inches water column (wc)
• Reset Type: Manual
• Maximum Operating Pressure: 15 psig
• Switch Type: SPDT (Single Pole Double Throw)
• Enclosure Rating: NEMA 4 / IP65
• Connection: 1/4 inch NPT
• Operating Temperature: -40 F to 140 F (-40 C to 60 C)
• Media Compatibility: Natural gas, propane, butane, biogas, hydrogen, and air

Applications

• Monitoring low gas pressure in industrial burner gas trains
• Safety shut-off systems for commercial boilers and furnaces
• Supervision of air pressure in HVAC ventilation and combustion air systems
• Gas pressure monitoring in power generation and process heating equipment
• Use in applications requiring manual acknowledgment of pressure faults