For information on available sizes, see our shaft seal catalog. Alternately, you can forward your seal questions by e-mail, or call us directly at 28. If you would like Kalsi Engineering to review your dredge pump seal application, please download an application questionnaire in PDF or Word format, and return it to us by e-mail or fax (28). Experienced personnel are also available to provide technical support. ![]() General seal implementation guidelines are provided in the Kalsi Seals Handbook™, which is available online here. Click here for slow motion seal animation of seal lubrication. When rotation stops, the hydrodynamic lubricating action stops, and static sealing is reestablished. This hydroplaning effect lubricates the seal and shaft, preventing the typical dry rubbing wear, high running friction and heat associated with conventional seals, allowing higher pressure and speed combinations and providing long life. When shaft rotation occurs, a thin lubricant film is hydrodynamically wedged into the dynamic sealing interface by the waves. The dynamic sealing lip incorporates a wavy hydrodynamic edge on the lubricant side, and an abrupt circular exclusionary edge on the environment side. Kalsi Seals are installed in a housing groove and compressed against a shaft, and seal statically in the same manner as other interference-type seals, such as O-rings. This combination of features minimizes running torque and seal-generated heat. The lubricant-side of the dynamic lip (see below) incorporates a wavy edge that hydrodynamically lubricates the dynamic interface. The Filled Kalsi Seal incorporates a soft silicone energizer that reduces contact pressure at the dynamic sealing interface. It isn’t unheard of for such face seals to leak significantly while still on the deck, before being used.Īlthough other types of Kalsi Seals may be even more appropriate as dredge pump seals, the Silicone-Filled Kalsi Seal (shown above) is the Kalsi Seal that is in most widespread use in submerged dredge pumps. The conventional seals have a long history of being prone to problems such as galling, seizure, premature failure, and catastrophic failure. They have now been used successfully in submerged dredge pumps and gearboxes for several years, and have proven to be superior to conventional face seals. ![]() This is a single-walled construction with an integrated cover - a pump construction with as few components as possible.Īdditionally our QuaZar execution is available as an intermediate construction, mostly for use under water where weight reduction is necessary, while maintaining the robustness of the Heavy Duty execution to a certain extent.Īll configurations are available for onboard, inboard, submerged and booster applications, and with suction diameters ranging from 240 to 1,400mm.Kalsi Seals were originally developed for the harsh oilfield downhole drilling environment. An all-purpose dredge pump and balanced option as regards weight, size and replaceable wear parts.įor operations that are less demanding. Excellent configuration for the most demanding of operations.Ī single-walled construction furnished with, where possible, replaceable wear parts. For every application there is a fitting execution and with over 2.000 pumps delivered these executions have proven their value.Ī double-walled pump construction fully equipped with replaceable wear parts. The slurry pumps can be executed in three types of constructions and delivered in all sizes.
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