![manifolds manifolds](/globalassets/08-about-hydro/hydro-worldwide/germany/remscheid/remscheid-images-1036x440-px-100-dpi/es-pt-remscheid---manifolds-1036x440-px.jpg?quality=85&width=1036&height=440&rmode=crop&rsampler=bicubic&rxy=0.5,0.5&compand=true)
Just as in the cooling of charge air, environmental laws focus on “green” technologies, resulting in industry-wide R&D on alternative coolants such as ammonia or CO2, demanding higher pressures systems. Our thick-walled round tubes are used in condensers, evaporators and heaters, traditional or new innovative designs.
We can deliver in short lengths or long tubes, in perfectly round or D-shape, as plain tubes or ready to use including slots, drill holes, baffles and welded-on connection blocks. Responding to the growing number of electric and hybrid vehicles, our newest development shows lengthwise slots to be used as collectors for contact battery coolers.
![stack of welded round tubes stack of welded round tubes](/globalassets/08-about-hydro/hydro-worldwide/germany/remscheid/remscheid-images-1000-px-100dpi/es-pt-remscheid---stack-of-welded-round-tubes.jpg?quality=85&width=470&height=264&rmode=crop&rsampler=bicubic&rxy=0.40,0.41&compand=true)
![Driving on the road Driving on the road](/globalassets/02-industries/0-industries-images/industries_automotive_istock-901650488_1036.jpg?quality=85&width=470&height=264&rmode=crop&rsampler=bicubic&rxy=0.5,0.5&compand=true)
![generic illustration generic illustration](/globalassets/stories/mahlebehr2000.jpg?quality=85&width=820&height=0&rmode=crop&rsampler=bicubic&rxy=0.44,0.24&compand=true)