Agriculture Piston and Plunger Pumps

Start with the required flow rate, operating pressure, and pump configuration for your equipment. If you're replacing an existing piston pump, check its manufacturer, series and model number and compare these with the specifications of the replacement.

The main difference is the arrangement of the moving component and seal. A piston pump uses a piston moving within the cylinder, while a plunger pump uses a reciprocating plunger that moves through a stationary seal.

Yes, agricultural piston pumps can be used for liquid fertilizer application when the pump is designed for the product being handled. Always check the pump specifications and material compatibility for your particular fertilizer.

The correct size depends primarily on the flow rate your application requires. Application rate, operating speed, equipment width, and system configuration can all affect the required GPM, so the highest-capacity pump is not automatically the best choice.

GPM means gallons per minute and indicates the pump's flow capacity under specified operating conditions. The CDS-John Blue piston pumps in this collection are available with different GPM ratings to suit different liquid application requirements.

PSI means pounds per square inch and is a measure of pressure. Many CDS-John Blue piston pumps in this collection have a rated pressure of up to 120 PSI, but always check the specifications of the individual model before purchase.

Choose according to the flow and configuration your application requires. Single-piston models in this collection provide options such as 21 and 34.2 GPM, while double-piston models include higher-capacity options such as 42 and 68.4 GPM.

A dual-rate piston pump can provide separate liquid outputs for applications that require them. For example, the CDS-John Blue NGP-8055-AR listed in this collection provides 42 GPM total output, divided into 21 GPM on each side.

Possibly, but you should not assume that another model is a direct replacement. Compare the series, flow rate, pressure, mounting, drive, connections, and pump configuration before changing models.

Check the identification information on your existing pump and compare the series and model number with the products listed in this collection. If you cannot identify the correct replacement, contact our team for assistance.

Yes. Agricultural pumps should be inspected and maintained according to the manufacturer's recommendations, with seals, fittings, and other service components checked for wear or damage.

Incorrect flow can have several causes, including pump setup, operating speed, worn components, restrictions, leaks or an incorrectly sized pump. Check the complete application system and the manufacturer's troubleshooting guidance before replacing the pump.