COMET BP75 LOW-PRESSURE DIAPHRAGM PUMP, 15 BAR

The Comet BP75 low-pressure diaphragm pump is designed for PTO-driven spray systems. This version features 3 diaphragms, delivers 68 l/min at 540 rpm, and operates at pressures up to 15 bar. Its 1 3/8" M solid shaft, foot-mounted design, and lack of a PTO guard are among the key points to check before replacement.

A sprayer pump designed for low-pressure systems

In a sprayer, a diaphragm pump circulates the liquid through the treatment system. This family of pumps is commonly sought after when the system operates at lower pressures compared to other spraying configurations. The BP75 is distinguished here by its 3-diaphragm design, its flow rate, and its drive type.

When replacing a pump, the goal is to find a replacement whose key specifications align with the existing setup. The values of 68 l/min and 15 bar serve as a baseline to ensure the new pump’s capacity is close to that of the removed pump, without being limited to the unit’s external appearance.

Key characteristics to note when identifying this BP75

• Type: low-pressure diaphragm pump
• Model: BP75
• Configuration: 3 diaphragms
• Flow rate at 540 rpm: 68 l/min
• Pressure: 15 bar
• Shaft: 1 3/8" M (non-through)
• Mounting: with feet
• Protection: No PDF protection

The model number can also be found as BP.75K. If this designation appears on the pump you need to replace, compare all mechanical and hydraulic components to avoid confusion with a similar version.

Non-through shaft and foot-mounted design: two critical mounting features

The 1" 3/8M non-through shaft determines the pump’s drive configuration. The “non-through” designation indicates that the shaft does not pass through the housing, which distinguishes this configuration from other possible designs. This criterion warrants careful verification during replacement, as it directly affects the mechanical fit around the drive train.

The presence of feet also guides the selection, since the mounting points must match the existing support on the machine. This BP75 model is also listed without a PDF guard. If your current setup includes a housing or a dedicated guard, this must be verified separately before reassembly.

How to Confirm That This Pump Fits Your Setup

Before selecting this sprayer pump, first compare:

• the model designation BP75 or BP.75K;
• the flow rate of 68 L/min at 540 RPM;
• the pressure of 15 bar;
• the 1"3/8M non-through shaft;
• the foot mounting and the installation environment.

Also check the other relevant dimensions on your removed pump, including the 3/8M dimension if it applies to your installation. Cross-referencing the model designation, shaft, mounting, and flow rate and pressure values will help you more reliably identify the correct BP75.

Dimensions and Technical Specifications

• 3/8M

FAQ — Frequently Asked Questions

What is the purpose of a BP75 low-pressure diaphragm pump on a sprayer?

It circulates the liquid through the spray system. This BP75 model is a 3-diaphragm version rated at 68 l/min at 540 rpm and 15 bar—useful specifications for replacing a pump with the same operating configuration.

What does “1"3/8M non-through shaft” mean?

This refers to the drive shaft size and the fact that it is not through-shaft. When replacing your pump, compare this specification with the removed pump, as a different shaft requires a different coupling and mounting configuration around the power take-off (PTO).

Does the BP75 pump come with a PTO guard?

No, this version is specified without a PTO guard. If your current setup uses a housing or guard around the drive shaft, check separately to ensure it is present and compatible before reinstalling the pump on the sprayer.

What specifications should you check before ordering the BP75 or BP.75K pump?

First, verify the model designation BP75 or BP.75K, then check the flow rate of 68 l/min at 540 rpm, the pressure of 15 bar, the 1"3/8M non-through shaft, and the foot-mounted mounting. These features help prevent confusion between pumps that look similar.

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