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Hydraulic symbol identification needed, please.

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F_Jacobsen

Industrial
Jul 18, 2024
1
Hi,
I'm looking to see if anyone here can explain to me how the valve in question is controlled. I've circled it in blue on the attached diagram.
It's part of a vehicle scissor lift. So far I've been unable to find any information about it. I have a theory that it may be controlled by whichever side of the valve has the highest pressure, but I would like that confirmed or dismissed. Any help is much appreciated. Thank you
 
 https://files.engineering.com/getfile.aspx?folder=842b149e-a036-4b64-af6c-5f379a050398&file=Vehicle_lift.PNG
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It's a manual control valve - rotary type

You turn the knob or lever to change which cylinder is operated.
 
Vehicle_lift_qynib1.png


Mobile Hydraulics
 
The valve also appears to have a variable restriction so I guess it is a single valve for speed and direction control of the cylinders.
 
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