Cla-Val Pacific's Models 210-01 and 610-01 Altitude Valves control the high water level in reservoirs without the need for floats or other devices. They are non-throttling valves that remains fully open until the shut-off point is reached. This valves are designed for one-way flow only.
Used on reservoirs where the water is withdrawn through a separate line or through a bypass equipped with a check valve. The valve opens to refill the reservoir when the water lowers below the shut-off level.