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Product Description
Types of Pre-action Alarm Valve
1. A single interlock system, which admits water to sprinkler piping ypon operation of detection devices.
2. A non-interlock system, which admits water to sprinkler piping upon operation of detection devices or automatic sprinklers.
3. A double interlock system, which admits water to sprinkler piping upon operation of both detection devices and automatic sprinklers
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