Choosing a barrel pump usually comes down to one thing: Viscosity. If you try to force a thick liquid through a pump meant for thin solvents, you’ll either cavitation the inlet or burn out the motor. Here is the quick breakdown of what actually works:
Electric: Best for high-volume transfer of thin fluids (water, light oils). Fast and efficient, but needs a power outlet.
Pneumatic (Air): The standard for "Hazardous Zones." Since there’s no electricity, there’s no spark risk. Great for solvents and fuels.
High-Viscosity (Screw type): These don't just move liquid; they push it. If you’re dealing with syrups, resins, or heavy oils, this is the only way to go without losing pressure.
Manual: Best for low-frequency use or remote sites. Simple, but it’ll give your arms a workout.
The goal is to keep the flow consistent without stressing the seals. Match the drive to the fluid, and the pump lasts ten times longer.
https://www.antliaworks.com/barrel-pump.html