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Mechanism of OS Valve Airflow Adjustment

2:04
3:32
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At 2:04 in

HVLP Overspray Control Valves | Tips Spraying With An HVLP Gun

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What happens here

The mechanical operation of the OS control valve is demonstrated. By slowly screwing the knob clockwise, an internal plunger is advanced into the air passageway of the spray gun. This action physically restricts the flow of air. Consequently, it reduces both the pressure and the volume of air delivered through the gun, allowing for a more controlled spray for detailed work.

Goal: Turning the OS valve screw clockwise physically restricts airflow by moving an internal plunger, reducing both air pressure and volume.

Tools and materials

  • Apollo 7700 HVLP Spray Gun

What they say

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control your air so way this works is I screw this I can slowly reduce this down and as I do this is your air passage that's coming through the gun here and as I reduce as I increase this screw it's sending this plunger into the air passageway and slowly restricting the air flow so you're not only reducing the pressure but you're also reducing the volume of the air through the spray gun as well which is important to do both so I can use this as a way to sort of cheat my air pressure and reduce the air pressure through a fixed powered turbine system but again for most of our

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