QPL31.140M00 Siemens Pressure Switch

Overview

The Siemens QPL31.140M00 is a manual reset low pressure switch designed for the supervision of gas or air pressures in industrial and commercial burner applications. Part of the Siemens QP series, this switch serves as a critical safety component by breaking the electrical circuit when the pressure drops below the adjusted setpoint. It is specifically engineered for HVAC systems to ensure that equipment operates within safe parameters, preventing potential hazards associated with low-pressure conditions.

Features

• Manual reset mechanism requires direct operator intervention to restore the circuit after a trip, enhancing system safety
• Adjustable pressure range allows for precise tuning between 7 and 55 inches water column
• Integrated surge protection handles pressure spikes up to 15 psi
• Durable construction suitable for a wide range of operating temperatures
• Safety certifications including UL listing for USA and Canada, FM approval, and ISO 9001 certification
• Ventless installation design simplifies mounting and reduces setup complexity

Specifications

• Model: QPL31.140M00
• Type: Manual Reset Low Pressure Switch
• Pressure Range: 7 to 55 inches WC (17.5 to 137 mbar)
• Maximum Pressure: 6 PSI (continuous); 15 PSI (2-second surge)
• Operating Temperature: -40 F to 140 F (-40 C to 60 C)
• Electrical Rating: 1/3 HP @ 125 to 250 Vac
• Weight: Approximately 0.60 lbs

Applications

• Monitoring gas or air pressure in gas trains for gas-fired equipment and burners
• Use in commercial and industrial HVAC systems to maintain optimal operation
• Integration into burner control systems where safety shut-off is required due to pressure loss
• Suitable for diverse industrial settings where pressure levels must be controlled within specific safety parameters