QPL15.003 Siemens Pressure Switch

Overview

The Siemens QPL15.003 is a compact, automatic reset pressure switch designed for the supervision of air or gas pressures in gas trains and gas-fired equipment. This precision-engineered safety device monitors pressure levels and triggers an electrical circuit change if the pressure falls below or exceeds a specific set point. It is particularly valued for its reliability in commercial and industrial burner applications, often used in conjunction with Siemens gas valves like the VGD series to ensure safe and efficient combustion.

Features

• Automatic reset functionality for continuous monitoring without manual intervention
• Adjustable switching point allows for customized pressure thresholds
• Compact design with a durable plastic housing and die-cast aluminum base
• High-quality electrical contacts (SPDT) for reliable signal switching
• IP54 rated protection against dust and water splashes
• O-ring connection for secure, leak-free mounting on integrated gas trains
• Suitability for use with gas families 1, 2, and 3, as well as neutral gaseous media

Specifications

• Model: QPL15.003
• Pressure Range: 0.7 to 3 mbar (0.07 to 0.3 kPa)
• Connection Type: O-ring seat
• Maximum Operating Pressure: 60 kPa (continuously)
• Switching Voltage: AC max. 250V / DC 24-48V
• Switching Current: AC max. 6A (at cos phi 1) / DC max. 1A
• Operating Temperature: -15 C to +60 C
• Weight: Approximately 155 g
• Mounting Position: Horizontal or vertical (not suspended)

Applications

• Supervision of gas and air pressures in gas trains of gas-fired equipment
• Minimum or maximum pressure monitoring for industrial and commercial burners
• Safety interlock circuits to prove gas pressure before burner ignition
• Integration into modular gas valve assemblies for combustion control systems
• Use in HVAC heating systems and process heating applications