Altitude valve

[hayderg2000]

I review design for central water station and i found an altitude valve between pump and tank but the pipe for filling is joined at the top of tank is that correct or must at bottom level of tank

 

[bimr]

Please post a schematic as it is difficult to understand your post.

 

[hayderg2000]

the attached file show the connection

 

[bimr]

An altitude valve will not function in that diagram.

A valve in that position will function as a pump control valve.

 

[hayderg2000]

thank you bimr

 

[zdas04]

Just for everyone's store of knowledge, what is the function of an "altitude valve" and where should it have been located?

David

 

[bimr]

The altitude valve controls maximum and minimum levels in a water tower by responding to the static pressure of the water.

One–way flow (filling only) or bi-directional flow are optional.

http://www.donmcpeak.com/OCV VALVES/ocv3330.pdf

 

[SteveWag]

In the Municipal Water world an “Altitude Valve” is a hydraulically operated valve designed for tank overflow limiting. Such a valve is placed in the fill line to a tank and closes completely at a designated “high” level, and opens completely at a designated “low” level. It does not modulate. These operating levels are typically about 10 -20 feet apart with “high” of 40-100 feet, but may wildly exceed those numbers. The valve needs to be near the tank and the level sensing line should tap the tank directly. Many times the sensing line is connected to the valve outlet and the sense then “sees” an incorrect tank level due to fitting losses and inlet/outlet velocity losses. The valve in the sketch would work only if a sense line was connected between the bottom of the tank and the valve. Altitude valves must be used with a lot of thought. If the valve in the sketch worked, the pumps would fill the tank and then the valve would close, causing the pumps to run at shut-off. If the tank is equipped with telemetry, get rid of the altitude valve and trust the telemetry.
Steve

 

[BigInch]

Or keep the valve as a backup for the telemetry.

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