Kalsi Engineering's blog

A 200-hour test of 10-1/2” RCD Seals at 100 rpm and 2,300 psi

Introduction We test our RCD seals in a variety of conditions, to ensure that our customers can meet their goals for the dynamic pressure rating test established by API Specification 16RCD (Specification for Drill Through Equipment—Rotating Control Devices). Since we are conducting full-scale tests, we are also learning useful things about implementing RCD seals in […]

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A new rotary seal with bi-directional pressure and rotation capability

Overview Kalsi Engineering has developed a hydrodynamically lubricated rotary seal that can operate with up to 1,000 psi (6.89 MPa) differential pressure acting from either side of the seal. This new seal, known as the BDRP™ (Bi-Directional Rotation and Pressure), also operates in both directions of rotation. The ability to handle bidirectional pressure and bidirectional […]

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Isken Ward, Chief Administrative Officer of Kalsi Engineering

  A familiar face has reappeared at Kalsi Engineering, Inc. (KEI). Dr. Kalsi’s daughter, Isken Ward, returned to KEI in 2014, and is presently serving as Chief Administrative Officer.  Her previous employment at Kalsi Engineering was from 1987 to 1995. During that time, she was involved in many aspects of the business.  She supported the […]

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Testing high pressure RCD seals at 2,300 psi with large extrusion gaps

Introduction To help our customers meet their high pressure rotary control device (RCD) goals, we have performed characterization testing of our 10.50” (266.7mm) PN 682-20-318 plastic lined RCD seals. The testing was performed at several different pressures, including duration testing at 2,300 psi (15.86 MPa). The 2,300 psi test pressure simulates a lubricant overpressure type […]

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Celebrating Daniel Alvarez’s 37 years of achievement at Kalsi Engineering

On Friday, March 17, 2017, Kalsi Engineering held a luncheon to celebrate Daniel Alvarez’s 37 years of service with the company, and the beginning of his transition to part-time work. He had thoughts of retiring, but we convinced him to remain employed part-time instead. Although Daniel began working for Kalsi Engineering in 1980, his long […]

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Another improvement in high pressure rotary sealing

Kalsi Engineering, Inc. has increased the reliability of extreme high pressure rotary sealing by improving the extrusion resistance of the force balancing seals used with Kalsi proprietary floating backup rings. The floating backup ring allows the smallest practicable extrusion gap between the rotary seal and the shaft, which allows the rotary Kalsi seal to withstand […]

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Testing RCD seals to collect leakage data

Introduction to the test fixture As described in previous blogs, Kalsi Engineering has a 10.50” fixture for testing full scale RCD seals. This helps to avoid scaling issues that may occur when testing on smaller fixtures. For example, the thermal mass and conductivity of our 10.50” fixture is similar to an RCD mandrel, which allows […]

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Kalsi Engineering employee discovers lost history of Fort Cumberland

Many customers know that Kalsi Engineering employee Lannie Dietle has discovered numerous improvements to our rotary seals and our seal implementation practices. Few know that he is also a historian who has made several important discoveries concerning early events in western Maryland and Pennsylvania. His second history book, released in December, 2016 by the Cumberland Heritage […]

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Kalsi Engineering, Inc. Develops Validated Methodology to Predict Flow-Induced Forces in Balanced Globe Valves

Kalsi Engineering, Inc. (KEI), under contract from the Electric Power Research Institute, has developed a new validated methodology for predicting the flow-induced forces in balanced globe valves used in commercial nuclear power plants.  These valves are used in critical-to-safety applications and previous methodologies used by the industry were limited in application or too conservative to […]

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Testing a large diameter floating backup ring in RCD operating conditions

Our inaugural test of 10.50” (266.7mm) floating backup rings is complete, and several lessons were learned. The purpose of the test was to debug the new test fixture configuration, to evaluate the suitability of steel as the bearing material of the backup ring, and to evaluate how PN 381-35-11 rotary seals perform when used when […]

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