Standard configuration: tungsten carbide/tungsten carbide (TC/TC) with EPDM or VITON O-rings. Silicon carbide/silicon carbide (SiC/SiC) options also available.
Article numbers: 96432881, 985167, 405145, 405009, 96513598, 985844, 96416348, 00985845, 425089, 00425303, 00425304, 985737, 985204, 00339701, 96521638, 98161845, 97788185, 345015, 345111, 345122, 96578599.
Suitable for liquids containing lime and sludge, and where there is a risk of deposits and sticking. Standard configuration: tungsten carbide/graphite (TC/CAR), silicon carbide/silicon carbide (SiC/SiC), or silicon carbide/graphite (SiC/CAR) with EPDM or VITON O-rings.
Article numbers: 96409293, 96409263, 00405096, 00405097, 96409265, 00485351, 00425062, 00425063, 00425063.
Simple seal for low pressure and narrow temperature ranges. Standard configuration: silicon carbide/graphite (SIC/CAR) with NBR, EPDM, or FKM O-rings.
Article numbers: 00985164, 435014, 00985751, 004N5012, 00395008, 445067, 004N5013.
Balanced, independent of shaft rotation direction, suitable for pumping solid and viscous liquids. Available in configurations: silicon carbide/graphite (SiC/CAR, for use at temperatures from 0°C to +140°C and up to 25 bar pressure) or silicon carbide/silicon carbide (SiC/SiC, for use at temperatures from –20°C to +90°C and up to 16 bar pressure).
Article numbers: 96548359, 96548355, 96658796, 97685509, 98161845, 96658807; 96551965, 96551960, 96658799, 96658810.
Cartridge seal, balanced, for use at pressures up to 30 bar.
Easy to replace without dismantling the pump unit. A disadvantage is the formation of deposits around the sealing ring, which can damage the ring in liquids with high lime or sludge content. However, in case of fretting, the protective sleeve is damaged instead of the shaft.
Standard configuration: tungsten carbide/graphite (TC/CAR), silicon carbide/silicon carbide (SiC/SiC), silicon carbide/graphite (SiC/CAR), or tungsten carbide/tungsten carbide (TC/TC) with EPDM or VITON O-rings.
Article numbers: 96455086, 96455087, 96533326, 96533327, 96455088, 96455089, 96491375, 96455082, 96455083, 96533322, 96533323, 96455084, 96455085, 91043611, 96533324, 96533325, 96511844, 96511845, 96511844, 96511845, 96511846, 96511847, 96511848, 96511849, 96511836, 96511837, 96511838, 96511839, 96511840, 96511841, 96511842, 96511843, 96525458, 96525490, 96533369, 96533412, 96525457, 96525459, 96533365, 96533366, 96436727, 96436728, 96533367, 96533368.
The following types of double seals are also possible in Grundfos pumps:
Our engineers will select a mechanical shaft seal for your GRUNDFOS pump of any model, including:
