Rotary Seal Blog

A revision of the Kalsi Seal Handbook

Our online seal handbook, which provides guidelines for implementing Kalsi-brand rotary shaft seals in rotating equipment, has been revised. Highlights of the revisions follow. Chapter D7 “Extrusion gap considerations” — Chapter D7 underwent a major rewrite to address the extrusion gap implications of a significantly expanded rotary shaft seal product line. Our product line now includes […]

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Exploring installation of -318 plastic lined seals in one-piece seal grooves

We are continuing to explore the installability of Plastic Lined Kalsi Seals made with the stiff and highly extrusion resistant -318 seal material combination. Our literature currently reports, “We were unable to install 10.49″ extra wide plastic lined seals made with the -318 material combination into a one-piece groove without seal damage.” That statement is […]

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A high pressure oil seal test with an ISO 48 viscosity grade lubricant

Kalsi Engineering has been conducting 10,000 psi tests directed at increasing the pressure capacity of hydraulic swivels, washpipe assemblies, and similar applications. Our previously reported 320-hour and 368 hour tests of 4.500″ rotary shaft seals at 10,000 psi were conducted with an ISO 68 viscosity grade seal lubricant. We have now completed an intentionally shorter […]

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Video of a 368-hour, 10,000 psi washpipe test

Plastic lined Kalsi Seals have the most pressure capacity of any polymeric rotary shaft seal. This video explains why.   We are pleased to announce a new video (above) that describes a 368-hour 10,000 psi test of a washpipe assembly with a 3-inch bore and a 4.50-inch sealing diameter. The test was conducted at 120 […]

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Testing Hybrid mud motor seals with increased compression

In late 2019 we blogged about  concentric and eccentric testing of Kalsi-brand rotary seals with dynamic lips that were significantly wider than those of our 507-series Wide Footprint Seals. The purpose of the significantly wider dynamic lip is to provide better extrusion resistance when used with large mandrel-to-housing extrusion gap clearances.  Those seals had the […]

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Kalsi Engineering COVID-19 safety measures

As a critical provider of products and engineering services to nuclear power plants and the oil and gas industry, Kalsi Engineering has taken various steps to promote safety and preserve our ability to support customers during the ongoing COVID-19 pandemic. We are fortunate that much of our business can be handled by telecommuting, allowing most […]

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A new video about high-pressure oil seal testing

Our new generation of high pressure rotary shaft seals is redefining the pressure capacity of high pressure rotating equipment. This video explains how we did it.   Here is a new video describing a 320-hour test of 4.500” oil seals operating at 9,500 to 9,800 psi differential pressure. The test was stopped at 320 hours […]

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Testing super wide seals for drilling fluid-to-oil partitioning service

Many rotary seals that partition drilling fluid from lubricant are used with lubricant overpressure, which improves the ability of the seal to exclude abrasives. With partitioning seals, the typically recommended radial extrusion gap clearance between the shaft and the seal carrier is 0.020”. This relatively large clearance helps to reduce abrasion of the seal and […]

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Recipient of the Warner Professional Practice Award

Kalsi Engineering employee Lannie Dietle is the 2020 recipient of Epsilon Pi Tau’s Region 1 Warner Professional Practice Award for exemplary achievement as a practitioner in a technology profession. A 1974 graduate of California University of Pennsylvania, Mr. Dietle has been employed at Kalsi Engineering since 1982, where he has been a key contributor to […]

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400 psi reverse pressure testing with runout

In a previous blog, we reported on successful 162°F (72.2°C) tests of the tanged 3.00” (76.2mm) PN 701-10-11 rotary shaft seals with 0.010” (0.25m) intentional runout. In one test, the pressure of the drilling fluid was 15 psi (1.03 bar) greater than the pressure of the seal lubricant. In another test, the pressure of the […]

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