QPH31.150M00 Siemens Pressure Switch

Overview

The Siemens QPH31.150M00 is a manual reset high-pressure switch designed for monitoring gas or air pressure in industrial and commercial burner applications. This high-precision safety device is engineered to break the electrical circuit when the sensed pressure rises above a user-defined setpoint. Part of the Siemens QP series, it ensures safe system operation by preventing over-pressure conditions in gas trains and combustion equipment.

Features

• Manual reset mechanism requires human intervention once the high-pressure limit is tripped
• High-pressure limit functionality breaks the circuit on pressure rise
• Adjustable pressure range with an easy-to-read scale for precise setpoint configuration
• Surge protection up to 15 psi to handle momentary pressure spikes without damage
• Flexible mounting options allow for horizontal or vertical installation
• Durable construction suitable for demanding industrial environments
• Ventless installation design for simplified setup

Specifications

• Model: QPH31.150M00
• Pressure Range: 10 to 60 inches Water Column (WC) / 25 to 150 mbar
• Reset Type: Manual
• Electrical Rating: 10A @ 125 to 250 Vac; 1/3 HP @ 125 to 250 Vac
• Connection: 1/4 inch NPT female pressure connection
• Maximum Operating Pressure: 6 psi (400 mbar)
• Maximum Surge Pressure: 15 psi (1 bar) for 2 seconds
• Operating Temperature: -40 F to 140 F (-40 C to 60 C)
• Approvals: UL listed for USA and Canada, FM approved, ISO 9001 certified

Applications

• High-pressure supervision for gas and air in commercial and industrial burners
• Integration into gas trains for gas-fired equipment and boilers
• Safety limit switching in HVAC systems to prevent equipment damage from over-pressure
• Monitoring of air or gas pressures in industrial combustion processes