The NAFFCO Flow Switch is one of the most important components in fire protection and fire alarm systems. Its primary function is to detect the flow of water inside fire sprinkler or firefighting pipelines and send a signal to the fire alarm control panel. This signal confirms sprinkler activation and plays a critical role in ensuring fast and reliable fire response.
Manufactured by NAFFCO (National Fire Fighting Manufacturing FZCO) in the United Arab Emirates, NAFFCO flow switches are widely used in residential, commercial, and industrial fire protection projects around the world.
What Is a Flow Switch in Firefighting Systems?
A flow switch is an electromechanical device installed on fire protection piping. When water starts flowing through the pipe—usually due to the activation of a sprinkler head—the flow switch detects this movement and triggers an electrical signal.
Why Flow Switches Are Essential:
- Confirm sprinkler system activation
- Send alarm signals to the fire alarm panel
- Activate audible and visual alarms
- Assist in fire pump and system monitoring
Without a flow switch, sprinkler discharge may occur without the alarm system being notified.
NAFFCO Flow Switch Applications
The NAFFCO Water Flow Switch is used in a wide range of fire protection systems, including:
- Wet pipe sprinkler systems
- Fire risers and zone control assemblies
- Commercial and residential buildings
- Industrial facilities and warehouses
- Hospitals, hotels, shopping malls, and data centers
Its reliability makes it suitable for both small and large-scale projects.
Types of NAFFCO Flow Switch
NAFFCO manufactures flow switches in different designs to suit various pipe sizes and system requirements.
Paddle Type Flow Switch (Most Common)
This type uses a paddle installed inside the pipe. When water flows, the paddle moves and activates a microswitch.
Key Features:
- Suitable for pipes 2 inches and larger
- Adjustable sensitivity
- Easy installation and maintenance
- Cost-effective solution
Diaphragm Type Flow Switch
This model operates using pressure applied to a diaphragm instead of a paddle.
Key Features:
- Suitable for smaller pipe sizes
- Faster response to low flow rates
- Higher resistance to vibration
Technical Specifications of NAFFCO Flow Switch
Typical specifications include:
- Operating Voltage: 24V DC / 220V AC
- Current Rating: Up to 5A
- Ingress Protection: IP65
- Operating Temperature: -20°C to +80°C
- Maximum Working Pressure: Up to 16 bar
- Connection Type: Threaded or flanged
Exact specifications may vary depending on the model.
How NAFFCO Flow Switch Works in Sprinkler Systems
When a sprinkler head opens due to heat, water begins flowing through the system. This flow moves the paddle inside the NAFFCO flow switch, activating the internal microswitch.
The signal is then sent to the fire alarm control panel, which:
- Activates alarms
- Logs system activation
- Confirms sprinkler discharge
It is important to note that a flow switch does not detect smoke or heat—it only detects water flow.
Difference Between Flow Switch and Pressure Switch
Many users confuse flow switches with pressure switches, but their functions are different:
| Feature | Flow Switch | Pressure Switch |
|---|---|---|
| Detects water flow | ✅ Yes | ❌ No |
| Detects pressure drop | ❌ No | ✅ Yes |
| Confirms sprinkler activation | ✅ Yes | ⚠️ Indirect |
| Used in alarm signaling | ✅ Yes | ✅ Yes |
In modern systems, both devices are often used together for higher reliability.
Why Choose NAFFCO Flow Switch?
Choosing NAFFCO Flow Switch means choosing safety, durability, and compliance.
Key Advantages:
- Manufactured in UAE
- Designed according to NFPA standards
- High-quality materials and construction
- Long service life
- Stable and accurate performance
- Compatibility with other NAFFCO products such asNAFFCO Butterfly Valve and NAFFCO Test & Drain Valve
Installation Guidelines for NAFFCO Flow Switch
Proper installation is essential for accurate operation.
Key Installation Rules:
- Install on horizontal piping whenever possible
- Maintain adequate distance from valves and fittings
- Ensure correct paddle direction (flow arrow)
- Use fire-rated cables for wiring
- Perform functional testing after installation
Installation should comply with NFPA 13 and local fire regulations.
Role of Flow Switch in Fire Alarm Systems
The NAFFCO flow switch acts as a bridge between the fire sprinkler system and the fire alarm system.
Once water flow is detected:
- Alarm signals are transmitted
- Fire event confirmation is recorded
- Emergency response is initiated
This makes the flow switch a mandatory component in most fire protection designs.
Testing and Maintenance of NAFFCO Flow Switch
According to NFPA 25, flow switches must be tested periodically.
Common Maintenance Checks:
- Verify paddle movement
- Inspect wiring connections
- Test alarm activation
- Check for false alarms caused by vibration
Routine inspection ensures long-term reliability and system approval.
Common Problems and Troubleshooting
False Alarms
Caused by pipe vibration, incorrect sensitivity, or air in the system.
No Alarm Signal
May be due to blocked paddle, wiring faults, or incorrect installation.
Professional inspection is recommended for fault diagnosis.
NAFFCO Flow Switch Supplier – Tetis Sazeh
Tetis Sazeh is a specialized supplier of firefighting equipment, providing original NAFFCO Flow Switches with technical consultation, installation guidance, and after-sales support.
Tetis Sazeh also supplies:
- NAFFCO Butterfly Valves
- NAFFCO Test & Drain Valves
- Fire pumps and firefighting accessories
- Firefighting system design and consultancy services
Price of NAFFCO Flow Switch
The price of a NAFFCO Flow Switch depends on:
- Pipe size
- Model type
- Certifications (UL / FM)
- Project quantity
For accurate pricing and technical support, contact Tetis Sazeh directly.
The NAFFCO Flow Switch is a critical component in any fire sprinkler and firefighting system. Its role in detecting water flow and activating alarms ensures early fire response and system reliability. Choosing NAFFCO products and sourcing them through trusted suppliers like Tetis Sazeh guarantees safety, compliance, and peace of mind.