Diaphragm pumps

Diaphragm pumps from VACUUBRAND® are the ideal vacuum technology for many applications in the laboratory and in industry. Important benefits include oil-free and whisper quiet operation, low maintenance requirements, and extended service life. VACUUBRAND offers diaphragm pumps in an aluminum design for non-corrosive media, in an uncompromising chemistry design or with ATEX approval for explosive areas. To ensure the highest possible reliability and durability, the diaphragm technology and the materials used are engineered and selected to withstand demanding applications.

Diaphragm pumps operate fully oil-free and do not have any sliding components in the gas path. During normal operation, they are completely free of abrasion. Contamination of the vacuum process due to particle generation, which is often encountered in the case of scroll pumps, is largely avoided.

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Diaphragm pumps

for non-corrosive media

Diaphragm pumps in aluminum design are ideal for applications with non-corrosive media in the vacuum range down to 0.3 mbar.

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Chemistry diaphragm pumps

for aggressive gases and vapors

Chemistry diaphragm pumps are ideally suited for pumping aggressive gases and vapors in a vacuum range down to 0.6 mbar. Selected fluoroplastics ensure uncompromising chemical resistance.

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ATEX pumps

for explosive areas

ATEX pumps have been specially developed for use in explosive areas. They offer ATEX conformity, category 2 (for example, for zone 1).

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OEM or built-in pumps

adapted to your requirements

We customize our diaphragm pumps to your installation requirements: colors, electrical interfaces, mountings, and much more can be changed in customized OEM versions.

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Use our online tool to find the right vacuum pump for your application:

Vacuum Pump Selection Guide

Technical highlights

Unsurpassed long-term performance – even with aggressive chemicals

VACUUBRAND diaphragm pumps are known for their reliability and long maintenance intervals. The secret to success are the special diaphragm technology and selected materials which make the most heavily stressed components particularly resilient. For use in chemistry, VACUUBRAND chemistry diaphragm pumps offer uncompromising chemical resistance.

As the result of multi-year performance tests, we have determined a typical diaphragm service life of 15,000 operating hours for our pumps. Thanks to the maintenance friendly design, diaphragms and valves can be easily changed. VACUUBRAND diaphragm pumps therefore run for many years with high reliability and require only minimal maintenance.

Tip: the efficient VARIO control increases maintenance intervals even further significantly.

Dry operation, clean processes

Thanks to the dry and completely oil-free operation, diaphragm pumps are ideally suited for clean processes and the production of pure products. They do not generate either contaminated oil or wastewater. Diaphragm pumps are therefore also particularly low-maintenance and environmentally friendly. In addition, they do not have any sliding components in the gas path which can produce abrasion. There is thus no contamination from particles which frequently occurs in the case of scroll pumps.

The best choice for your application

VACUUBRAND offers diaphragm pumps in aluminum design for non-corrosive applications, as chemically resistant variants or with ATEX approval for explosive areas. With a unique selection with regard to pumping speed, ultimate vacuum, and accessories, you will find the perfect diaphragm pump at VACUUBRAND for your applications

➝ Vacuum Pump Selection Guide

Do you have any questions or would you like advice?

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FAQ

What should be kept in in mind when connecting the diaphragm pump?

The right connection elements and a connection which is as leakage-free as possible are important for achieving the pump specifications indicated. Use a suitable vacuum hose which offers adequate stability and does not become porous. The hose should be as short as possible and have the maximum cross-section possible. The selection of connection elements depends on your pump model and the vacuum connection of the application. We would be happy to advise you in this regard.

What is the function of a gas ballast?

Condensation inside the pump impairs its function and performance and can eventually lead to damage. This problem affects both diaphragm and rotary vane pumps. Many pumps therefore have what is referred to as a gas ballast, which lets in small amounts of air or inert gas to the pump through a valve. This minimizes the condensation of gases inside the pump and ensures that droplets that have already formed are pushed towards the outlet. For many applications in chemistry, this function is indispensable for maintaining performance specifications as well as for the protection of the pump.

Does a diaphragm pump need to warm up prior to operation?

No, a diaphragm pump does not need any warm-up phase. However, for self-cleaning, the pump should be left to run for 15-30 minutes with the gas ballast valve open and/or the inlet open. Any condensate will be removed as a result.

How often do parts subject to wear need to be replaced?

We have subjected our diaphragm pumps to multi-year performance tests and determined a typical diaphragm service life of 15,000 operating hours. The parts subject to wear should be replaced after this period of time or no later than when vacuum values decrease. With VARIO control, the motor speed is adjusted based on need. As a result, maintenance intervals can be significantly increased even further.

The diaphragm pump no longer achieves ultimate vacuum. What can I do?

Check the hoses and connectors for leaks. Another reason may be the formation of condensate in the pump chamber. It is therefore important to use the gas ballast when working with condensible media and to allow the pump to run for 15-30 minutes after operation. Decreasing vacuum values may also be an indication that parts subject to wear need to be changed. If this does not solve the problem, contact our Service Department. We would be happy to help you!

servicevacuubrand.com

Tel.: +49 9342 808-5660

The diaphragm pump lowers the pressure too far. What can I do?

Check the in-line suction valve. The seal may be dirty or worn. If this does not correct the problem, contact our service department. We would be happy to help you!

servicevacuubrand.com

Tel.: +49 9342 808-5660

Do you have any questions or would you like advice?

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Diaphragm pumps