Fire Protection Low Pressure Switch

The Fire Protection Low Pressure Switch is designed for automatic pressure monitoring and fire pump control in fire protection water supply systems.

Installed on fire pipelines, the switch continuously monitors system pressure and automatically activates the fire pump when pressure drops below the preset value, ensuring a rapid and reliable emergency water supply.

Available in DN50–DN200 sizes, this pressure switch is widely used in commercial buildings, industrial facilities, municipal fire protection networks, and other fire suppression systems.

What Is a Fire Protection Low Pressure Switch?

A fire protection low pressure switch is an automatic control device that detects pressure changes within a fire water pipeline.

When pipeline pressure falls below the preset threshold, the switch sends an electrical signal to the fire pump control panel or PLC, automatically starting the fire pump to restore system pressure.

Once the pressure returns to the normal operating range, the control system can stop or manage pump operation according to the fire protection control logic.

This automatic operation ensures that fire protection systems remain ready to respond without manual intervention.

Working Principle

The Fire Protection Low Pressure Switch integrates a pressure sensing element with an electrical relay output.

The operating sequence is as follows:

1. The pressure sensor continuously monitors the pipeline pressure.

2. The measured pressure is compared with the preset switching point.

3. When pressure falls below the configured value, the relay output changes state.

4. The control signal activates the fire pump or fire control system.

5. After pressure recovery, the system returns to its standby operating condition.

This process enables fast and reliable automatic pressure control in fire protection systems.

Key Features

Automatic Fire Pump Control

The pressure switch automatically controls fire pump operation by:

• Detecting pressure loss

• Sending relay output signals

• Activating fire pumps

• Maintaining pipeline pressure

This improves system response during emergency conditions.

Designed for Fire Protection Systems

Suitable for installation in:

• Fire Water Supply Systems

• Fire Pump Stations

• Fire Sprinkler Systems

• Hydrant Networks

• Industrial Fire Protection Pipelines

• Municipal Fire Protection Infrastructure

High Measurement Accuracy

The pressure sensing system provides stable and accurate pressure monitoring to ensure reliable switching performance.

Designed for continuous operation in critical fire protection applications.

Adjustable Switching Points

Users can configure:

• Pressure switching values

• Control thresholds

• Normally Open (NO) contacts

• Normally Closed (NC) contacts

Flexible settings allow adaptation to different fire protection system designs.

Multiple Media Compatibility

Suitable for pressure monitoring of:

• Water

• Air

• Oil

• Non-corrosive industrial fluids

Technical Specifications

Structural Design

The pressure switch features a durable construction designed for long-term field operation.

Components include:

• Ductile iron valve body

• Engineering plastic housing

• Industrial flange connection

• Integrated pressure sensing mechanism

• Electrical relay output

The robust design provides reliable performance in demanding fire protection environments.

Typical Applications

The Fire Protection Low Pressure Switch is widely used in:

• Fire Water Supply Systems

• Fire Pump Control Panels

• Fire Sprinkler Systems

• Hydrant Networks

• Commercial Buildings

• Industrial Plants

• Warehouses

• Municipal Fire Protection Projects

• Hospitals

• Shopping Centers

• High-Rise Buildings

Installation Recommendations

Before installation:

• Verify the product model and pipeline size.

• Confirm that the power supply matches the rated voltage (24 VDC).

• Ensure flange connections are properly sealed.

• Test relay output after installation.

For maintenance:

• Periodically inspect pressure settings.

• Verify relay operation.

• Check electrical wiring and flange connections.

• Perform routine functional testing according to local fire protection regulations.

Advantages of the Fire Protection Low Pressure Switch

Compared with conventional manual monitoring methods, the Fire Protection Low Pressure Switch provides:

• Automatic fire pump activation

• Continuous pressure monitoring

• Fast response time

• Reliable relay control

• Adjustable switching points

• Easy installation

• Low maintenance requirements

• Long service life

These advantages make it an essential component in modern automatic fire protection systems.