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CA-Fire ZSJZ25-1.6Mpa Threaded Water Flow Switch

(Integrated Flow Monitoring & Alarm Trigger for Fire Pipeline Branches)

 

1. Product Name & Positioning

 

Full Name: CA-Fire ZSJZ25-1.6Mpa Threaded Water Flow Switch (Aluminum/Plastic/Copper, DN25 Caliber, 1.6MPa Working Pressure, Integrated Alarm Signal Output)

Abbreviation: CA-Fire DN25 Threaded Water Flow Switch

Core Positioning: A small-caliber, threaded-mount flow monitoring component for fire protection systems-fundamentally different from saddle-type flow indicators (clamp-on, large-caliber). It integrates water flow detection and alarm signal transmission, designed exclusively for fire pipeline branches (e.g., sprinkler system branches,small-diameter hydrant lines) needing precise flow monitoring. With multi-material options,threaded quick installation and reliable signal output, it solves the "small-branch flow blind spot" problem that saddle-type indicators (suitable for main pipelines) can't cover-ideal for commercial buildings,high-rises,residential complexes and industrial small-branch fire systems.

 

2. Core Product Advantages (Key Differences from Saddle-Type Flow Indicators)

 

1. Threaded Connection: Stable Small-Caliber Adaptation vs. Saddle Clamp-On

The most critical distinction from saddle-type (clamp-mounted) indicators:

Threaded installation (DN25): Designed for small-diameter pipeline branches (DN25), directly screwed into pipeline joints-no need for pipeline cutting or clamping, avoiding leakage risks from saddle-type's clamp loosening (common in small-caliber pipelines).

Saddle-type limitation: Clamp-on design is suitable for large main pipelines (DN50+), hard to fit small branches and prone to misalignment or leakage on thin-walled pipes.

2. Compact Integrated Design: Space-Saving for Branch Layouts

Optimized for dense branch pipeline scenarios:

Integral structure (flow sensor + signal module) with small volume (no external bracket required), easy to install in narrow spaces (e.g., ceiling cavities,wall-mounted fire cabinet pipelines)-saddle-type indicators are bulkier, requiring more installation space.

Lightweight (0.3-0.8kg based on material) vs. saddle-type (1-2kg), reducing load on small-diameter pipeline joints and avoiding pipeline deformation.

3. Multi-Material Options: Cost & Corrosion Flexibility

Tailored for diverse indoor/outdoor branch environments:

Aluminum: Cost-effective for dry indoor branches (e.g., office sprinkler lines).

Plastic: Lightweight,corrosion-resistant for humid areas (e.g., basement pipelines).

Copper: High corrosion resistance for coastal or mild chemical environments (e.g., laboratory branch lines).Saddle-type indicators mostly use cast iron/stainless steel, lacking cost and material flexibility for small-branch scenarios.

4. Precise Flow Trigger: Adapt to Branch Flow Characteristics

Calibrated for small-branch flow ranges:

Trigger flow range 15~37.5L/min, matching the low-to-medium flow of sprinkler branches or small hydrant lines-avoids false alarms from minor flow fluctuations (common in saddle-type indicators designed for large main pipeline flow).

Electrical performance (DC24V 1A/AC220V 0.5A) ensures stable signal transmission to central fire alarm systems, with response time ≤1s for rapid emergency notification.

5. Easy Maintenance & Replacement

Simplified upkeep for branch pipeline components:

Threaded connection enables quick disassembly (no tools required for replacement), reducing maintenance downtime-saddle-type indicators require loosening clamps and pipeline shutdown, which is more cumbersome.

No regular calibration needed; only annual visual inspection of thread tightness and signal line connection-lower maintenance cost than saddle-type indicators (which need periodic clamp re-tightening).

 

3. Detailed Technical Parameters (Comparison with Saddle-Type Flow Indicators)

 

Parameter Category	CA-Fire ZSJZ25-1.6Mpa Threaded Flow Switch	Saddle-Type Flow Indicator
Core Function	Small-branch flow monitoring & alarm trigger	Main pipeline flow monitoring & signal output
Connection Type	Threaded (DN25)	Clamp-on (DN50+)
Working Pressure	1.6MPa	1.6-2.5MPa
Trigger Flow Range	15~37.5L/min	50~200L/min
Material Options	Aluminum/Plastic/Copper	Cast Iron/Stainless Steel
Installation Space	Compact (no bracket required)	Bulkier (needs pipeline clearance for clamping)
Maintenance Complexity	Low (quick threaded disassembly)	High (clamp loosening/tightening required)
Applicable Pipelines	Small-diameter branches (DN25)	Large main pipelines (DN50+)

 

4. Applicable Scenarios

 

Sprinkler System Branches: Installed in office,residential or commercial sprinkler branch lines (DN25), monitoring flow when sprinklers activate and triggering alarms.

Small-Diameter Hydrant Lines: Matching DN25 indoor hydrant branches, detecting abnormal flow (e.g., hydrant leakage) and sending signals to property management.

Special Indoor Branches: Data centers,museums or laboratory small-diameter fire branches, using copper/plastic materials for corrosion resistance and precise flow monitoring.

Residential Complex Fire Networks: High-rise apartment floor-level fire branches, compact design fitting narrow pipeline shafts and reducing installation space.

 

5. Frequently Asked Questions (FAQ) 

 

When to choose this threaded switch over saddle-type indicators?Choose it for small-diameter pipeline branches (DN25),space-constrained areas or cost-sensitive projects (e.g., residential floor branches,office sprinkler lines). Saddle-type is better for large main pipelines (DN50+) needing non-destructive installation.

Can it be installed on vertical pipelines?Yes. It supports horizontal/vertical installation (flow direction marked on the body), but ensure the flow direction is consistent with the indicator-vertical installation is suitable for vertical sprinkler risers in high-rises.

What if the signal fails to transmit?Check: ① Power supply (DC24V/AC220V) connection; ② Signal line integrity; ③ Thread tightness (loose installation may cause flow detection failure). The switch has a built-in self-test function for quick fault diagnosis.

How to match it with fire alarm systems?It outputs standard dry contact signals, compatible with most central fire alarm systems (e.g., Siemens,Notifier). Connect the signal line to the system's input module-no need for custom adapters.

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