Self-Priming Pumps
Self-Priming pumps, like our FLOMAX® series, are engineered to evacuate air from the system and begin pumping without manual priming. Their unique impeller and casing design creates a vacuum that allows the pump to draw fluid from below its level—up to 25 feet (7.5 meters).
Advantages:
- Perfect for installations where the pump is positioned above the fluid level.
- Capable of dry-run operation (with proper sealing).
- Easy to maintain and operate.
- Ideal for mobile and field applications.
Typical Uses: Agriculture, marine, transportation, emergency dewatering systems.
End-Suction Pumps
End-Suction pumps, such as the CHEMFLO® series, are traditional horizontal centrifugal pumps where fluid enters the center of the impeller and is pushed outward by centrifugal force. These pumps must be primed before startup to prevent dry-run damage.
Advantages:
- Higher efficiency for large flow rates (up to 800 GPM).
- Available in a wide range of materials (stainless steel, cast iron, bronze).
- Suitable for high-temperature fluids (up to 650°F / 343°C for oil, 400°F / 204°C for water).
- Quiet operation and no need for external priming systems.
Typical Uses: Chemical processing, heating systems, cooling circuits, fluid circulation in vehicles.
Choosing the Right Pump
The best pump for your application depends on installation conditions and fluid characteristics:
| Criteria | Self-Priming | End-Suction |
|---|---|---|
| Position relative to fluid | Above fluid level | At fluid level |
| Self-priming capability | Yes | No |
| High-temperature fluid handling | Limited | Excellent |
| Mobile applications | Ideal | Less practical |
