Rotary Seal Blog

Blogging is a way for Kalsi Engineering to provide up to date information more quickly than we can through traditional information channels like our seal handbook and static web pages. Here you will learn how we are working to solve industry problems through posts about new rotary seal products and posts about testing directed at specific industry problems and applications. You will also learn about the people who make it all happen, as we highlight the achievements and milestones in their lives. Visit our blog for the latest information on Kalsi-brand rotary seals and other Kalsi Engineering products and services.

KEI Flow Loop Upgrade

KEI is committed to providing superb engineering services to our valued customers. In early 2021 KEI will complete an upgrade to our flow loop that will allow us to expand our services. The upgrade will reduce the back pressure on the test section and allow for extended Flow Coefficient (Cv) and Liquid Pressure Recovery Factor […]

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Testing BDRP Seals for high pressure hydraulic swivel service

Introduction to BDRP swivel seals BDRP seals (Bi-Directional Rotation and Pressure) are patented rotary seals engineered to generate hydrodynamic lubrication with high differential pressure acting from either side and with rotation in either direction. This makes them an excellent seal for high pressure hydraulic swivels. The key advantage that BDRP seals provide over Cap Seals […]

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KEI’s Continued Support of the International Nuclear Power Industry

Ryan Sicking of Kalsi Engineering was a presenter at the CANDU Owners Group virtual conference. The CANDU Owners Group was attended by plant engineers, valve manufacturers and other service providers. Ryan’s presentation addressed the key items identified during recent NRC inspections of US Nuclear power plants. Key Points of Ryan’s presentation are: The purpose of […]

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2,500 psi Tests of Mud Motor Seals at 285°F and 250 sfpm

Introduction to Extra Wide mud motor seals The Extra Wide Hybrid Seal™ was developed so that oilfield mud motor sealed bearing assemblies can benefit from the advantages of a much wider dynamic sealing lip. The advantages include increased structural strength and pressure capacity, and additional sacrificial material to accommodate wear mechanisms such as extrusion damage […]

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BDRP Seals™ for the fluid power industry

  Introduction BDRP Seals are featured in the September 17, 2020 “Fluid Power Journal” article “Kalsi Engineering Releases New Class of High-Pressure Seals”. The article focuses on the pressure and speed capacity of BDRP Seals, which far exceeds that of the cap seals used in the fluid power industry. The image above compares a BDRP […]

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8.434” BDRP-type rotary seals install easily without a removable groove wall

Rotary seal installation testing This is a follow-up to our July 14, 2020 blog “Exploring installation of -318 Plastic Lined Seals™ in one-piece seal grooves”. In that blog we noted that 10.490” Plastic Lined™ rotary seals with a 0.415” nominal radial cross-section and an “extra wide” dynamic lip width could be installed in a one-piece […]

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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 […]

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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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