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Pressure maintaining system RDHS ½ – 3

The devices and components of compressed air treatment within the compressed air network are designed for load operation and the corresponding flow rates. If the pressure within the system is missing – e.g. at unload or after breaks in operation  the proper functioning of these components and thus the required compressed air quality cannot be guaranteed. In addition, when the compressors are started up, there is a risk of overloading these components due to the lack of resistance.


The electronically controlled RDHS pressure-maintaining system ensures that compressors that start up again quickly work against the specified network pressure in the area of compressed air treatment. This ensures an optimally functioning treatment system right from the start due to immediately correct flow rates. The system is designed for operation with 230 Volt alternating current.


Technical specifications

Connections: G½ – G3 inch
Max. pressure: 10 bar



  • Functioning treatment system thanks to correct flow rates when the compressors are restarted
  • Operational reliability due to protection against impermissible flows and overloading
  • Gentle pressure build-up due to electronic control
  • User friendly – easy configuration and manual override in case of emergency
  • Fast installation thanks to existing range with different connector widths

The RENNER secret of success: Partnership, service-oriented, reliable and short lead times

Innovative strength and high quality standards, coupled with a consistent focus on customer needs and a good price/performance ratio – this is the key to RENNER's success. Once you have purchased a RENNER compressor, you can be rest assure that you will receive a compact, robust, reliable and energy-efficient product specially tailored to your needs. In addition, you can take advantage of a servicing network of well-trained partners worldwide. This not only applies to our area of expertise, screw compressors, but also to piston compressors and oil-free compressed air – made in Germany.

Energy efficiency: a matter of course for RENNER compressors

Whether frequency-controlled, with refrigeration dryer, mounted on a compressed air tank or as a complete compressed air station: energy efficiency is a matter of course at RENNER. All series work extremely cost-efficient.

RENNER has more than 6,000 customizable compressor models on offer. From the pressure level to the energy consumption  we adapt your compressor exactly to your needs.

We are the specialists for compressed air

Quality Made in Germany – that's RENNER! In 1994 Annette and Bernt Renner founded the company in Güglingen, Baden-Württemberg. What started out as a garage with three employees has since developed into an international company with over 160 employees.

RENNER compressors are manufactured with the most modern production processes in every size and finish. From small mobile piston compressors to large SCROLL and screw compressors for industrial installations – compressors from Güglingen are represented all worldwide. RENNER is since 2006 certified according to DIN EN ISO 9001.