Sprinklers & Alarm Valves

Vane Type Water Flow Indicator (ZSJZ Series)

ZSJZ Water Flow Indicator is a critical element in automatic wet sprinkler systems. It is installed at the branch supply pipe to detect water flow and convert the kinetic energy of water into electrical signal alerts.

Key Features

Flexible microswitch with high electrical conductivity and long service life
Built-in adjustable delay circuit (2-60 seconds) to filter out water hammer fluctuations and prevent false alarms
Supports saddle (saddle-mount), thread, or flanged/grooved installations
Vane blade flexes smoothly without obstructing the main water channel

Technical Specifications

Size Range: DN50 - DN200
Working Pressure: 1.2 MPa / 1.6 MPa
Switch Sensitivity: 15 < Q < 37.5 L/min (Trigger threshold)
Signal Output: DC24V / 3A (Dry Contacts SPDT)

Parts & Materials List

Saddle Housing: Ductile Iron (QT450-10)
Vane Blade: Flexible Polymer / Stainless Steel
Electrical Box: Fire-Retardant Engineered ABS IP54
Delay Timer Circuit: Solid State PCB Sealed

Applications

Automatic sprinkler systems
Commercial and residential buildings
Industrial warehouses
High-hazard deluge and pre-action systems

Quality & Testing

Pressure and leakage testing per GB 5135 series; alarm sensitivity verified with flow switches and alarm gongs.

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Frequently Asked Questions

What is the difference between a wet alarm valve and a deluge valve?

A wet alarm valve (ZSFZ) keeps the sprinkler piping filled with water and triggers the alarm on water flow. A deluge valve (ZSFM) stays closed under air or water pressure and floods the system only when a fire detection signal opens it - used for high-hazard areas requiring immediate large water discharge.

What standards do the sprinkler system components comply with?

Components are manufactured and tested in accordance with GB 5135 series and, on request, other international standards. Confirm the applicable standard for your project with our engineers.

What is the working pressure of the alarm valves?

Standard working pressure is 1.6 MPa with a testing pressure of 3.2 MPa. Size ranges typically cover DN50 to DN300 depending on the model.

Can the alarm valve groups be integrated with existing fire detection systems?

Yes. Deluge and pre-action valves support mechanical, pneumatic or electrical (DC24V solenoid) remote triggers and can be integrated with most fire alarm control panels.