Welcome! In order to provide you with the best possible service, we use cookies on this website. The cookies we use can be divided into different groups. You can adjust your consent to the use of these cookies directly here, or at any time via the item "Privacy". By clicking on “Accept all”, you consent to our use of cross-website tools to provide you with personalised information for marketing purposes, including outside our website through our partners. These tools enable personalised online ads and advanced analytics and reporting on audience and user behaviour. You also agree that the data may also be transferred to third countries outside the European Economic Area without an adequate level of protection under data protection law (in particular the USA). There are no guarantees that government agencies will not access your data. You can revoke this consent at any time with effect for the future here. Necessary cookies Cookies of this group are necessary for the proper operation of the website. They are not subject to consent and cannot be deactivated. By using our website, you agree to this. Comfort cookies Our website uses external services in some places to provide you with additional functions. This group includes, for example, our interactive representative map. Marketing / Tracking cookies These types of cookies allow us to determine, among other things, which content you are particularly interested in. In this way we can further expand our service for you and constantly improve our website. ACCEPT ALL SAVE SELECTION PERSONALIZE SETTINGS Wir regeln das. Seit 1851.

Our history 1851 Foundation Arnold Oventrop (1820-1871) founds the Arnold Oventrop & Co. Messing- und Broncewarenfabrik in Altena. Materials containing copper are the common denominator for the manufacturing programme - the factory produces brassware, such as fittings for furniture, doors and windows.

1. Data protection at a glance General Information The following information will give you a straightforward overview of what happens to your personal data when you visit our website. Personal data means any data which enable you to be identified personally. More detailed information on the topic of data protection is available in our Privacy Policy, which you will find listed below this document. Collection of data on our website Who is responsible for the collection of data on our website? Data processing for this website is undertaken by the website operator. You will find its contact details in the company details section (Imprint) on our website.

Searchparameters for online layout Medium Water 20%Ethylene glycol (-10°C) 27%Ethylene glycol (-15°C) 34%Ethylene glycol (-20°C) 39%Ethylene glycol (-25°C) 44%Ethylene glycol (-30°C) 48%Ethylene glycol (-35°C) 52%Ethylene glycol (-40°C) 56%Ethylene glycol (-45°C) 32%Propylene glycol (-15°C) 38%Propylene glycol (-20°C) 43%Propylene glycol (-25°C) 47%Propylene glycol (-30°C) 52%Propylene glycol (-35°C) 55%Propylene glycol (-40°C) 60%Propylene glycol (-45°C) Supply Temp. °C Return Temp. °C Load Watt Flow rate m³/h Differential pressure mbar