Yamato Protec Corporation
Yamato Protec YAVS-65AII Water Flow Detection Device
Manufacturer: Yamato Protec Corporation
Model: YAVS-65AII
Application
A wet-type differential valve flow detection device that reduces the risk of false fire alarms and water leaks. This product has passed the tests stipulated by the ministerial ordinance that sets the technical standards for flow detection devices.
| Product name | YAVS-65AⅡ |
|---|---|
| Model number | Flow No. 30-1 |
| Maximum flow rate (L/min) | 900 |
| Nominal pressure | 10K |
| Installation method | vertical |
| Operating pressure range | 0.15–1.4 MPa |
| Detection flow constant | 50/60 (combined type) |
| Non-operating flow rate | 18L/min or less |
| Contact capacity | AC 250V 2A |
| DC 30V 2A | |
| Delay time | 5-25 seconds |
Purpose
Sprinkler, water spray, and foam fire extinguishing systems use the YAVS-II wet-type water flow detection valve, which complies with the technical standards of the Fire Service Act (Article 21-2, Paragraph 2). Pressurized water or foam solution constantly fills both the primary side (inlet) and secondary side (outlet). Opening a closed sprinkler head or release valve drops the secondary-side pressure, forcing the valve body open. As the pressurized fluid flows to the secondary side, the device automatically detects the internal flow and triggers an alarm.
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