De or het dampspanning?

The correct Dutch article is:

de dampspanning

Rule Words ending in -ing: almost always de. See the rule

How to use dampspanning

the dampspanningde dampspanning
this dampspanningdeze dampspanning
that dampspanningdie dampspanning
our dampspanningonze dampspanning
your dampspanningjouw dampspanning
every dampspanningelke dampspanning
which dampspanning?welke dampspanning?
a big dampspanning / the big dampspanningeen grote dampspanning, de grote dampspanning