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211-01 Altitude Control Valve for One-Way Control

211-01 Altitude Control Valve for One-Way Control


The Cla-Val Model 211-01 Altitude Valve controls the high water level in reservoirs without the need for floats or other devices. It is a non-throttling valve that remains fully open until the shut off point is reached. This valve is designed for one-way flow only.

This valve is hydraulically operated and pilot controlled. The pilot control operates on the differential in forces between a spring load and the water level in the reservoir. When the force of the spring is overcome by the force of the reservoir head, the pilot closes the main valve. The desired high water level is set by adjusting the spring force. The pilot control measures the reservoir head through a customer supplied sensing line connected directly to the reservoir.
This valve can also be furnished with auxiliary controls to meet the need for multiple functions, such as: pressure sustaining, pressure reduction, rate of flow control, solenoid override, etc. For applications requiring delayed opening, please refer to Cla-Val Model 211-03 Altitude Valve with Delayed Opening e-sheet.
Product Advantages
  • Accurate and Repeatable Level Control
  • Drip-Tight Positive Shut-Off
  • Reliable Hydraulic Operation
  • Easily Adjustable Control
  • Completely Automatic Operation

Typical Applications

Ideal for use on reservoirs where water is withdrawn through the Altitude Valve. The valve closes at the high water level and opens for return flow when the pressure at the valve inlet lowers below the reservoir pressure. For more information see data sheet E-CDS7 for the CDS7 Altitude Pilot Control.
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