Operating conditions encountered in the automatic controlling of gas and air flows often require valves with an adjustable flow curve which can be altered at various points of opening to obtain the desired amount of flow. With Hauck adjustable flow valves, the flow rate can be easily changed at any of the 10 or more adjusting points provided. Therefore, the valve flow curve can be characterized to suit different constants in pressure, flow suction, or discharge resistance occuring at the minimum, maximum or in-between capacities.
Details
Operating conditions encountered in the automatic controlling of gas and air flows often require valves with an adjustable flow curve which can be altered at various points of opening to obtain the desired amount of flow. Such flexibility is not obtainable with ordinary adjustable port valves having a fixed height of port opening over the entire range of operation.
With Hauck adjustable Flow Valves, the flow rate can be easily changed at any of the 10 or more adjusting points provided. Therefore, the valve flow curve can be characterized to suit different constants in pressure, flow suction, or discharge resistance occuring at the minimum, maximum or in-between capacities. Infinite flexibility of flow characteristics is thus available. These valves are designed for use as control valves and they should not be used as shutoff valves.
The adjustable Flow Valve can easily be linked to a Hauck Micro Oil Valve and Hauck adjustable Port Valve for manual or automatic control of gas, oil, and air flow to burners.
For the 1″ thru 4″ valves, the valve body and piston are made of cast iron. For the 6″ valve, the body is fabricated (welded) steel and the piston is fabricated aluminum. The valve spring and cam spring are of steel and other internal operating parts are of brass. All valves have four pads on each side which are drilled and tapped to facilitate mounting.
Operation. The valve consists of a cylindrical piston with a rectangular port. The rectangular port both rotates and reciprocates within the valve body, which also has a rectangular opening. When the valve lever is moved from low (1) to high (10) position, the rectangular opening in the body is uncovered for flow. The height of the rectangular port is adjustable. The position of the cam spring affects the position of the rocker arm, which in turn controls the height of the port. The cam spring can be adjusted at 10 or more independent points (the number of points is dependent on the valve size) by rotating the adjusting screws located under the valve dial.
If more or less flow is desired at any position, the adjusting screw under the pointer is turned in to increase, or out to decrease, the height of the port opening and thus change the overall port area at that point. Great flexibility of flow characteristics is provided by the adjusting screws which can be set for either uniform or varying increments of change in capacity at the 10 valve dial positions.
Printable Literature
AFV Fact Sheet
AFV Specifications
AFV Parts List
AFV Instructions
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