1. Automatic rehydration valve with decompression device, the pressure value can be adjusted with the pressure gauge and automatically maintain the adjusted system pressure; when the system pressure decreases, automatically open the water injection, to set the pressure automatically shut down to avoid pressure Too high damage to system equipment. 2. To prevent system water backflow; Automatic fill valve with a check valve to prevent the system water in the water pressure to reduce or stop the return. 3. Manual cut off; To facilitate the maintenance of system equipment, Manual shut-off valve can be closed to replenish the water
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