Calgary, Alberta, Canada dzyanis@engineer.com

Fluid Power Pro

Valve adjustment – Number of turns

Here you can find the online chart which let you easy adjust any flow or pressure valve using its settings range and the available number of turns.

 

Adjustment accuracy: psi/bar/gpm/lpm/etc.

Turn accuracy: turn.

turns increase setting.

 

Valve adjustment range
Min value Setting value Max value
Turns value Max turns
Number of turns

 

Result:

 

How to use this chart.

Example #1.

You have a throttle valve with an adjustment range 0..15 GPM. Let the number of turns from fully closed to fully open of the valve is 6. And you need to know how many turns you have to do to adjust the valve to 12.5 GPM.

First, put the necessary adjustment accuracy value 0.1. Next, change the max adjustment value to 15 and max number of turns 6. Finally, put your target adjustment value to 12.5. Now you get the turns value: 5.25. This is a closest value with 1/4 turn’s accuracy. So, to adjust the valve, you have to completely close it, and next open it with 5 and 1/4 turns, or, as an option, completely open the valve and next close it with 3/4 turns (max 6 turns minus 5 and 1/4 turns).

Example #2.

You have a pressure relief valve with an adjustment range 1000..3000 psi. Let the number of turns of the valve is 5. And you need to know how many turns you have to do to adjust the valve to 1500 psi.

First, change the min adjustment value to 1000. Next, change max adjustment value to 3000 and max number of turns 5. Finally, put target adjustment value to 1500. Now you get your value: 1.25. This is a closest value with 1/4 turn’s accuracy. So, to adjust this pressure relief valve, you have to completely decompress the valve’s adjustment spring (usually full CCW turns), and next compress it with 1 and 1/4 turns (usually CW turns).

If you find a mistake, please let me know.

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