High pressure tube unions

Covering all requirements

DILO's success story began in 1951 when the metal-to-metal seal high pressure tube unions were launched.

Today's product range includes weld-on tube unions and blocking valves, non-return valves and high pressure hoses: all that is required for high pressure tube unions, guaranteeing maximum tightness. With nominal diameters from DN3 to DN50 and pressures ranges up to 1,000 bar our product range meets all requirements.

Different materials are available so that high process reliability is always maintained whatever the media. Standard series are available from stock and can be delivered immediately.

Our staff will be pleased to advise you on the selection of the most suitable material for your applications. We also offer support when planning and developing complex pipework systems such as plant piping.

Find out more about the wide range of high-precision HD products from DILO

Best conditions for the safe use of fittings: greatest possible gastightness when connecting pipes

In many fields of application, the use of fitting systems with very low leak rates is mandatory. The DILO sealing principle ​​​​​​​is perfectly suited for use in hydrogen applications due to its metal-to-metal sealing principle without any intermediate seal compound, which can be opened and closed as often as required. All fittings from our standard product range are suitable for hydrogen applications and can be manufactured from the standard materials 1.4571 or 1.4404. If other materials are required, custom-made designs are possible when providing us with the special material needed.

In order to guarantee the product quality and functionality of the DILO fitting system for hydrogen applications, we have had a special series for hydrogen applications tested and approved by TÜV Süd. The tests were carried out in accordance with EC 79/2009 for a nominal pressure of 700 bar and the component tests described in EU directive 406/2010.