NY70 Fire Protection Low Pressure Switch

The NY70 Fire Protection Low Pressure Switch is a high-performance digital pressure switch designed specifically for automatic fire protection systems.

Featuring a large digital display, programmable pressure settings, and relay outputs, the NY70 continuously monitors pipeline pressure and automatically controls fire pumps when pressure falls below preset values.

Its rugged stainless steel construction and intelligent electronic design make it ideal for fire water supply systems, sprinkler networks, hydrant systems, and industrial fire protection installations.

What Is a Fire Protection Low Pressure Switch?

A fire protection low pressure switch monitors the pressure inside a fire protection pipeline.

When the system pressure drops below the configured threshold, the switch immediately sends a relay signal to activate the fire pump or fire control panel, ensuring sufficient water pressure during emergency conditions.

Compared with conventional mechanical pressure switches, the NY70 offers:

• Higher measurement accuracy

• Digital pressure display

• Programmable switching points

• Faster response

• Greater reliability

• Easier parameter configuration

Working Principle

The NY70 uses a high-precision electronic pressure sensor combined with a microprocessor-based controller.

The operating sequence is as follows:

1. The pressure sensor continuously measures pipeline pressure.

2. The measured value is displayed on the digital screen.

3. The controller compares the pressure with the user-defined upper and lower limits.

4. When pressure falls below the preset value, the relay output changes state and starts the fire pump.

5. When normal pressure is restored, the control system returns to standby according to the programmed control logic.

This intelligent control helps maintain stable pressure throughout the fire protection system.

Key Features

Intelligent Digital Pressure Monitoring

The NY70 integrates:

• Pressure Measurement

• Digital Pressure Display

• Relay Switching Output

• Pressure Alarm

• Automatic Fire Pump Control

into one compact device.

Large Digital Display

The large 100 mm display provides:

• Real-time pressure readings

• Clear visibility

• Easy parameter configuration

• Improved on-site operation

Programmable Switching Control

Users can easily configure:

• Upper Pressure Limit

• Lower Pressure Limit

• Relay Switching Points

• Alarm Thresholds

The settings are stored electronically for reliable long-term operation.

High Measurement Accuracy

• Accuracy: ±0.5% Full Scale

• Long-Term Stability: Typical ±0.2% FS/year

• Sampling Rate: 5 Hz

These specifications ensure stable and reliable pressure monitoring.

Heavy-Duty Industrial Construction

The NY70 is designed for demanding fire protection environments with:

• High-pressure sealed housing

• 304 Stainless Steel pressure connections

• 316 Stainless Steel wetted parts

This provides excellent durability and corrosion resistance.

Technical Specifications

Electrical Protection

To improve reliability in industrial environments, the NY70 includes:

• Short-Circuit Protection

• Reverse Polarity Protection (DC Models)

• Electromagnetic Interference (EMI) Protection

These features enhance system stability and reduce maintenance requirements.

Wiring Configuration

Standard wiring includes:

Power Supply

• Red – Positive (+)

• Blue – Negative (−)

Relay Output

• Black

• White

Dry-contact relay outputs allow easy integration with:

• Fire Pump Controllers

• PLC Systems

• Alarm Panels

• Building Management Systems (BMS)

Mechanical Design

The NY70 is engineered for reliable field installation.

Features include:

• High-pressure sealed housing

• Digital pressure display

• Industrial stainless steel pressure interface

• Compact installation design

• Easy maintenance

Available process connections include:

• G1/4

• G1

• M20 × 1.5

Custom process connections are also available.

Typical Applications

The NY70 Fire Protection Low Pressure Switch is widely used in:

• Fire Water Supply Systems

• Fire Pump Control Systems

• Fire Sprinkler Networks

• Fire Hydrant Systems

• Commercial Buildings

• Industrial Plants

• Warehouses

• Municipal Fire Protection Projects

• High-Rise Buildings

• Hospitals

• Shopping Centers

It is suitable for pressure monitoring of liquids and gases compatible with 316 stainless steel.

Advantages of the NY70 Fire Protection Pressure Switch

Compared with conventional mechanical pressure switches, the NY70 offers:

• Intelligent digital pressure display

• High measurement accuracy

• Adjustable switching points

• Fast response speed

• Heavy-duty stainless steel construction

• Excellent long-term stability

• High electrical load capacity

• Multiple power supply options

• Superior reliability for critical fire protection systems