Successful throughout the world: Sealing technology in mechanical pulp production

EagleBurgmann convinced the persons responsible for the liquor line in a pulp mill to equip the shaft of the pressure disk filter with the practical and reliable mechanical seal LP-D, thereby increasing the MTBR to an extraordinarily long period of three years.

Operating conditions: p1 = 1.3 … 1.5 bar (18.8 PSI … 21.7 PSI), t = +85 °C … + 90 °C (+185 °F … + 194 °F), vg = <1 m/s (3,28 ft/s), n = 0.5 … 3 min⁻¹, Medium: Lime milk mixture (white liquor and lime slurry)

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HA211 type mechanical seals operate in the fiberization process of the mechanical pulp production at Nippon Paper in Japan to provide secure sealing of white water.

Operating conditions: p = 1 bar (15 PSI), t = 30 °C (86 °F), n = 1,450 min⁻¹.

UPM Plattling/Germany uses Metso pressure grinders to fiberize wood. EagleBurgmann HSSHR8-D4/470-E1 type mechanical seals are used to seal off both sides of the high-consistency groundwood pulp at the grindstone shaft.

Operating conditions: p = 3 bar (44 PSI), t = 150 °C (302 °F), n = 350 min⁻¹.

EagleBurgmann M42S2/470-00 type mechanical seals operate successfully in several pressure grinders in the pulp mill at Stora Enso Publication Paper in the Maxau/Germany plant.

A horizontally arranged machine shaft is sealed by an Espey E-WDKS205 type carbon floating ring seal at Norske Skog Saugbrugs in Norway.

Operating conditions: t = 40 °C ... 50 °C (104 °F ... 122 °F), n = 11 ... 15 min⁻¹.

EagleBurgmann Burajet SF6335 and Burajet 8032SCW type compression packings are installed in Andritz refiners as shaft seals at the Mexican paper factory Copamex Papelara de Chihuahua.

Operating conditions: p = max. 16 bar (232 PSI), t = 200 °C (392 °F).