APS51 HIGH-PRESSURE DIAPHRAGM PUMP, 51 L/MIN, 40 BAR

This APS51 high-pressure diaphragm pump is suitable for a direct replacement when you are looking for a 3-diaphragm pump with a 1"3/8M shaft and a 6-hole mounting pattern with feet. It features a flow rate of 51 l/min at 540 rpm and a pressure of 40 bar—two key specifications to compare with your current pump before installation.

A 3-diaphragm pump for pressurized fluid systems

In this family of pumps, the diaphragms ensure the circulation of fluid within a pressurized system. This design is commonly used in many agricultural machines when it is necessary to match the flow rate and pressure to those of the existing installation.

The APS51 model features a straightforward 3-diaphragm configuration. If you are replacing a worn-out pump, this design serves as a starting point, but it must always be verified against the installation and drive specifications.

Technical Features That Distinguish the APS51

Several factors are directly relevant when selecting this pump:

• Model number: APS51
• Other reference: APS.51 m/f
• Shaft: 1 3/8" M
• Mounting: 6 through-holes with feet
• Configuration: 3-diaphragm pump

The 1"3/8M shaft is an important specification, as it determines the drive connection. Similarly, the 6-hole through-hole mounting with feet must match your existing setup to avoid a haphazard adaptation.

Flow rate and pressure: values to compare with your current pump

This model is rated for a flow rate of 51 l/min at 540 rpm. The specified speed allows you to assess compatibility with your machine’s intended operating speed. If your system is designed to operate around this value, you have a concrete reference to guide your selection.

The pressure rating of 40 bar completes this identification. Flow rate and pressure must be considered together: one indicates the volume of fluid delivered, the other the pressure level. For a reliable replacement, these two specifications must be consistent with the removed pump and with the requirements of the relevant system.

What to Check Before Replacement

In the absence of detailed machine specifications, this pump is identified primarily by its specific characteristics. Compare the designation APS51, the notation APS.51 m/f if it appears on your old pump, and the reference 51 m if it appears on your parts list.

Next, check the key specifications: shaft type, mounting method, number of diaphragms, flow rate at 540 rpm, and maximum pressure indicated. If these specifications match your installation, you’ll have a much more reliable basis for identification than relying solely on external appearance.

Before confirming, take the time to compare each characteristic with your existing pump to ensure that this APS51 is indeed the right replacement for your needs.

Dimensions and Technical Specifications

• 3/8M
• 51 m

FAQ — Frequently Asked Questions

What is a high-pressure diaphragm pump like the APS51 used for?

It is used to circulate a liquid in a pressurized system. In this family of pumps, the diaphragms perform the pumping action, while the flow rate and pressure specifications allow you to compare the pump you need to replace with the new model.

How do I correctly identify this APS51 pump before ordering?

Identification is based first on the model designation APS51 or APS.51 m/f, then on the 1"3/8M shaft and the 6-hole mounting with feet. Also verify the specified values of 51 l/min at 540 rpm and 40 bar to avoid an incorrect replacement.

What does the 1"3/8M shaft on this pump mean?

This indicates a 1"3/8 male drive end. This is a critical checkpoint, as the shaft compatibility determines whether the pump can be installed on your machine, just as much as the mounting configuration and the overall dimensions of the pump in question.

Are the flow rate of 51 l/min at 540 rpm and the pressure of 40 bar sufficient to select this model?

These are two key factors, but they shouldn’t be the only ones. To confirm you’ve made the right choice, also compare the APS51 model number, the presence of 3 diaphragms, the 1"3/8M shaft, and the 6-hole mounting with feet on your current pump.

Original replacement part numbers and brand names are provided solely for comparison purposes. This does not imply that these are original parts.