Glossary “fluid needle valve” Definition:
It seats in the fluid tip on a spray gun to prevent flow or can be pulled back to allow flow.

Glossary “fluid coupling” Definition:
Device in the power train containing two rotating members, one of which transmits power to the other via fluid, such as a torque converter.

Glossary “fluid drive” Definition:
A drive in which there is no mechanical connection between the input and output shafts, and power is transmitted by moving oil or fluid.

Glossary “fluid friction” Definition:
Friction between the layers of molecules in a fluid.

Glossary “fluid leak” Definition:
See external leaks and internal leaks.

Glossary “fluid needle” Definition:
A part of the spray gun; it opns or shuts off the flow of paint.

Glossary “fluid control valve” Definition:
On a spray gun, it can be turned to adjust the amount of paint or other material emitted.

Glossary “fluid aeration” Definition:
Air bubbles formed in a fluid, giving the appearance of foam.

Glossary “fluid cooler” Definition:
1). Small heat exchanger component in a hydraulic line near the pump to reduce power steering fluid temperature. 2). A device inside the radiator to provide cooling for transmission fluid. 3). Any heat exchanger designed to reduce the temperature of a fluid, such as an engine oil cooler.

Glossary “fluid control knob” Definition:
Part of a spray gun, it changes the distance the fluid needle moves away from its seat in the nozzle when the trigger is pulled. This controls the amount of paint flow.