Diaphragm pumps

Diaphragm pumps – Versatile technology for different liquids

Diaphragm pumps are robust, reliable positive displacement pumps that have been specially developed for pumping a wide variety of liquids. They operate gently, are self-priming, and are safe to run dry—making them ideal for many applications in agriculture, workshops, and industry.

How a diaphragm pump works

Diaphragm pumps belong to the group of positive displacement pumps and operate with a flexible diaphragm that sucks in and conveys fluid through mechanical movement. The function is based on a simple but very effective principle:

suction stroke:
The diaphragm is pulled backward (e.g., via an eccentric shaft or a pneumatic drive). This creates negative pressure in the pump housing, which draws the liquid into the pump chamber through an inlet valve.
pressure stroke:
The diaphragm is then pushed back to its original position. The pressure generated closes the inlet valve and simultaneously opens the outlet valve. This forces the liquid out of the pump.

This cycle repeats continuously and ensures a steady flow rate. The valves (usually ball valves or flaps) reliably prevent the fluid from flowing back.

Advantages of the diaphragm pump principle:

Self-priming (even with dry pipes)
Dry-run safe – no damage during short-term operation without medium
Suitable for aggressive or sensitive media
Low maintenance – no rotating seals in the medium
High chemical resistance (depending on material selection)

Our range of diaphragm pumps is designed for:

Plant protection products
Oils and lubricants
Diesel fuel
Kerosene

Water
AdBlue®
Antifreeze
Windscreen washer fluid

Whether you are looking for a solution for agricultural spraying technology, workshop use, or industrial dosing – we offer the right diaphragm pump for your application.

Overview of the models

Pro-One Series

The main feature of air-operated double-diaphragm pumps (AODD) is their versatility. They can be used in countless applications and can pump a wide variety of fluids under various operating conditions. Pump components can be manufactured from different materials and in different designs to ensure chemical and physical compatibility with the fluid being pumped and to meet the technical requirements of the application.

Your Benefits at a Glance

Up to 30% lower air consumption
10 dB quieter—for a significantly more comfortable work environment
IoT-ready—electronic monitoring can be retrofitted
Flexible connection positions—for easy installation
Flow direction reversal available
Various materials available:
- stainless steel
- polypropylene (PP)
- aluminum

Zubehör

Pulsation damper

The No Pulse (NP) Series represents the state of the art in dynamic
diaphragm pulsation dampers designed to reduce vibrations and flow fluctuations.

They feature a DOUBLE DIAPHRAGM and a DIRECT FLOW PATH
They do not consume air during operation
They can be configured with various construction materials, depending on the
medium being processed

Principle of Operation

When fluid enters the pulsation damper, the diaphragms absorb the pulsation and release the
fluid volume when pressure and flow rate drop. The diaphragms operate thanks to a pressurized air cushion that automatically adjusts in response to the fluid pressure.

Main Components

Technical Features

Pneumatic operation
Max. flow rates up to 600 l/min
Long service life
No electrical components
Max. delivery pressure 8 bar
Easy installation
Configurable construction materials

Silencer

High-Performance Auxiliary Silencer

This high-performance auxiliary silencer was specifically designed for compressed-air diaphragm pumps to effectively reduce operating noise. When used in conjunction with the pump, it significantly reduces exhaust noise, thereby contributing to a more pleasant and quieter work environment.

Sensor

Electronic Pump Monitoring

The magnetic sensor enables monitoring of the operating frequency of PRO ONE series pumps.

They come factory-equipped for integration with electronic monitoring systems (patented). Users can easily install the sensors to enable the following:

Flow Measurement
Air Consumption Monitoring
Dry-Run Detection
Operating Performance Statistics
Fluid Viscosity Monitoring
Predictive Maintenance
Anomaly Detection

MC-Serie

The robust double piston diaphragm pumps are versatile and can be used in agriculture and cleaning applications. They deliver liquids evenly in the medium pressure range and have good suction properties. They are mainly used for applying pesticides to small to medium-sized areas, as well as for disinfecting stables and cleaning PV and industrial systems.

A special corrosion-resistant version with a propylene housing and Viton® diaphragms is available for use with acids. The pumps can be flexibly mounted on various vehicles.

AdBlue® Membranpumpe

AdBlue® is used to reduce nitrogen oxide emissions in modern diesel engines and requires material-resistant conveyor technology.
Our diaphragm pump without dynamic seals is particularly low-maintenance and reliable.

The pump head made of technopolymers makes it ideal for AdBlue®, antifreeze, and water. The pump is ideal for transferring and filling from drums, IBCs, or tanks and ensures a clean and safe pumping process.