Diaphragm dosing technology

Highly accurate and shear-free dosing and mixing of liquids and abrasive media

Where everyone else gives up, we're just getting started

PROMERA’s membrane dosing systems represent the “premier class” of our dosing technology and are synonymous with the highest precision and reliability. They are used in applications where conventional methods reach their limits:

• Extremely high viscosity (up to 1,000,000 mPas) and, as a result, high pressure (up to approx. 200 bar).
• High temperature (up to 170°C)
• Abrasive or corrosive liquids (quartz sand-filled polyol or peroxide-based cross-linking agent).
• Reactive or sensitive liquids, such as isocyanates, UV-curing coatings, or metallic paints.
• Dynamic and time-sensitive dosing tasks involving two- or multi-component systems.
• Process reliability: Reliable operation with system availability exceeding 98%.
• Dosier­genauigkeit von <0,1%.

A modular system makes it possible to configure the right system for a wide range of tasks with relatively little engineering effort. If necessary, the modular system can be supplemented with system-specific components (valves, mixing heads, etc.).

The principle behind diaphragm metering technology is to isolate the sensitive components from the process or the material as much as possible. Only the diaphragm and the inlet and outlet valves come into contact with the dispensed liquid (no gears, pistons, or dynamically stressed seals in contact with the material). This enables the processing of liquids that would quickly destroy any piston dispenser or gear pump.

Thanks to its innovative design, dosing accuracy remains consistently stable. This is a fundamental prerequisite for the optimal execution of chemical mixing processes.

The hydraulic metering axis generates a highly precise flow rate of hydraulic oil. Using special functions in the sequence control, the axis also automatically monitors the condition of the diaphragm metering valve, thereby ensuring consistent metering accuracy.

The dosing axis is identical in every system, regardless of the liquid being processed and all process parameters

The diaphragm metering unit is the component that comes into contact with the metered liquid. It consists of two chambers (left and right) that work together as a single unit. Each chamber is separated by a double diaphragm into a “material side” and an “oil side.” The “oil side” is connected to the dosing shaft. The “material side” has an inlet and outlet valve that are actively switched by the control system.

The double diaphragm is identical in every system. The other components of the dosing unit (base body, valves) are tailored to the specific application.

• Depending on the fluid, system pressure, and temperature, we use base bodies made of coated aluminum, stainless steel, or POM.
• The valves also form a modular system: Depending on the application, the two system sizes can be equipped with different sealing systems, actuators, and valve seats, and are actuated hydraulically or pneumatically depending on the system pressure.

The plug and play solution for your production

Our compact diaphragm dosing system offers you a fully integrated and stand-alone solution in a compact cabinet. It combines all the necessary components in one unit and is the ideal choice for companies that prefer a quick and uncomplicated installation.

The low-pressure diaphragm dosing system is particularly suitable for dosing and mixing 2 or 3 components in a dynamic dosing ratio that can be flexibly adjusted via the software. The system is perfect for coating and painting applications, especially when processing filled, abrasive or chemically aggressive liquids.

Promera's diaphragm dosing technology is versatile and offers solutions for numerous industries and demanding materials. Our systems help companies to maximize efficiency, precision and sustainability. With the combination of industry diversity and material flexibility, Promera's diaphragm dosing technology is the ideal solution for demanding industrial processes.

• Polyurethanes with quartz sand
• Ceramic-based feasting
• Demineralized water (fully demineralized water)

What is diaphragm dosing technology?

A high-precision dosing technology that processes liquids precisely and without shear stress thanks to the double diaphragm system.

Which media can be processed?

From aqueous systems to highly viscous and abrasive materials such as polyurethanes or ceramic slurries.

How individual are the systems?

Each system is tailored precisely to your requirements - for maximum efficiency and quality.

Support from planning to commissioning.

Our range includes high-quality mixing heads for low-, medium- and high-pressure applications. Each system is adapted to your specific requirements - contact us and we will develop a customized solution for your production.

Our diaphragm dosing technology is the key to consistently high quality, reduced operating costs and innovative processes. Contact us and find out how we can revolutionize your production.