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Double seal / Balanced/ Independent of direction of rotation/ Multiple springs

Double seals of the H74-D series have the same design-feature as the" H7N " family of single seals (easy-to-replace seal faces, ect.). Apart from the installation length of the drive collar, all fitting dimen-sions (d1< 100mm) conform with DIN 24960.

Operating limits

p1=25(40)bar 360(580)PSI

t=-50...200℃  -58º℉... 430℉

(-20...180℃) -4F...355℉

Vg=20m/s(10m/s*) 66(33)ft/s

*)Limit for shrink-fitted carbide seal faces with d1≥105mm

Axial movement:

d1< 100mm+0.5mm

d1> 100mmt2.0mm