Which pump is used for low-pressure oil spray applications between 20 and 100 psi?

Which pump is used for low-pressure oil spray applications between 20 and 100 psi?

• A. Gear
• B. Piston
• C. Diaphragm
• D. Roller

Answer: (A)

Gear pumps are a good fit for low to moderate pressure spraying of viscous fluids like oil because they provide a steady, positive-displacement flow with minimal pulsation. The gears trap a fixed amount of liquid and move it from inlet to outlet with each rotation, delivering a smooth, controllable flow that sits reliably in the 20–100 psi range. They’re simple, robust, and handle oil’s viscosity well without needing very high pressures. Piston pumps are geared toward very high pressures and have more pulsation, diaphragm pumps are often used for slurries or abrasives and can require higher pressures, and roller pumps are typically favored for very low-viscosity liquids and may not offer the same smoothness with oil. This is why gear pumps are the best choice for this application.

Gear pumps are a good fit for low to moderate pressure spraying of viscous fluids like oil because they provide a steady, positive-displacement flow with minimal pulsation. The gears trap a fixed amount of liquid and move it from inlet to outlet with each rotation, delivering a smooth, controllable flow that sits reliably in the 20–100 psi range. They’re simple, robust, and handle oil’s viscosity well without needing very high pressures. Piston pumps are geared toward very high pressures and have more pulsation, diaphragm pumps are often used for slurries or abrasives and can require higher pressures, and roller pumps are typically favored for very low-viscosity liquids and may not offer the same smoothness with oil. This is why gear pumps are the best choice for this application.