Waterflow Alarm Switch with Glue-in Union is a vane-type waterflow detector designed for use in wet sprinkler systems that utilize CPVC plastic fittings. Built for 1″, 1¼”, 1½”, and 2″ pipe sizes, this switch provides precise flow monitoring and quick alarm activation when water movement is detected within the sprinkler piping network.
Engineered for easy installation in confined spaces, the device features a glue-in union connection, ensuring a secure and watertight fit with plastic fittings used in modern fire protection systems. This high-performance waterflow switch enhances fire safety by delivering early warning signals during sprinkler activation.
Key Features
1:Vane-Type Flow Detection – Accurately monitors water movement within CPVC sprinkler pipes.
2:Glue-In Union Connection – Simplifies installation in tight or confined areas and ensures a secure, reliable fit.
3:Adjustable Pneumatic Retard – Instantly recycling mechanism prevents false alarms caused by pressure surges.
4:Dual SPDT Snap-Action Switches – Provides reliable electrical output for alarm or supervisory signals.
5:Flow Activation Threshold – Triggers when flow reaches 10 GPM (38 LPM) or more.
6:Compact Design – Ideal for use in limited-space sprinkler system installations.
7:Durable Construction – Built to withstand long-term exposure to water flow and varying system pressures.
Technical Specifications
- Type: Vane-Type Waterflow Alarm Switch
- Connection Type: Glue-in Union for CPVC Plastic Fittings
- Pipe Sizes: 1″, 1¼”, 1½”, 2″
- Switch Type: Two Single Pole Double Throw (SPDT) Snap-Action Switches
- Activation Flow: 10 GPM (38 LPM) Minimum
- Retard Mechanism: Adjustable, Instantly Recycling Pneumatic Retard
- Application: Wet Pipe Sprinkler Systems
- Installation Orientation: Horizontal or Vertical as per system design
- Operating Environment: Indoor use, compatible with CPVC wet sprinkler systems
Applications
The Waterflow Alarm Switch with Glue-in Union is designed for fire protection systems that use CPVC piping, commonly installed in:
- Commercial buildings
- Residential fire sprinkler systems
- Industrial facilities
- Warehouses and storage areas
- Office complexes and retail centers
It ensures that any water movement caused by a sprinkler head activation or system flow triggers an immediate alarm, notifying monitoring systems or local alarms for rapid response.
Operation
When water flow within the sprinkler line exceeds 10 gallons per minute, the vane inside the switch moves, activating the snap-action contacts. The adjustable pneumatic retard delays signal output just long enough to eliminate false alarms due to transient water pressure fluctuations.
Once the flow persists beyond the set retard time, the switch sends an electrical signal to activate audible and visual fire alarms or notify a control panel. The system resets automatically once the water flow stops.
Advantages
- Accurate Flow Detection: Detects real fire sprinkler activation, minimizing false alarms.
- Easy Installation: Glue-in union allows simple, secure installation without complex fittings.
- Reliable Signal Output: Dual SPDT switches provide redundancy for alarm and supervisory circuits.
- Maintenance-Friendly: Compact and serviceable design for easy access and adjustment.
- Universal Compatibility: Fits all standard CPVC pipe systems in fire protection networks.
Installation Guidelines
1:Ensure the switch is installed on the main line of a wet sprinkler system using CPVC pipes.
2:Glue the union connection according to standard plastic pipe bonding procedures.
3:Adjust the pneumatic retard as per system requirements to prevent nuisance alarms.
4:Wire the SPDT contacts in accordance with alarm system wiring standards.
5:Test the device regularly as part of routine fire system maintenance.
💡 Pro Tip: Always follow local fire safety codes and industry standards when installing or servicing waterflow alarm switches.
Why Choose a Waterflow Alarm Switch with Glue-in Union?
✔ Enhanced Fire Safety: Provides immediate detection of sprinkler activation.
✔ Simple Installation: Union connection allows fast setup in limited spaces.
✔ Accurate Performance: Adjustable retard ensures precise alarm timing.
✔ Long-Term Reliability: Built for consistent operation in CPVC-based sprinkler systems.
✔ Compliance Ready: Designed to meet fire protection standards for waterflow detection.
