Testing a 10.500” RCD seal at 1,500 psi and 50 rpm

Our KLS-brand high pressure lip seals were originally offered for sale after successful 1,000 psi testing of 3.375” diameter seals at 543 surface feet per minute (sfpm), duplicating the surface speed of a 10.375” RCD seal at 200 rpm. The 3.375” diameter seals have a 0.287” radial cross-section and fit in a 0.250” radial gland […]

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Rotary shaft seal testing with drilling fluid and 100 psi ‘reverse’ pressure

Kalsi Engineering has tested various prototype rotary shaft seal designs where the pressure of the drilling fluid is 100 psi (6.89 bar) greater than the pressure of the seal lubricant. Through this effort we learned that this “reverse” pressure condition tends to encourage the seal to slip circumferentially in the seal groove. We also observed […]

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Video Showing A Floating Backup Ring In Operation

Introduction to high pressure seal implementation challenges Mechanical designers face five significant challenges when implementing high pressure rotary seals: shaft runout; shaft misalignment; shaft deflection; pressure-related hardware deformation; and the dissipation of seal-generated heat. These challenges, and their solutions, are described below. The video included above shows how our patented floating backup ring addresses the […]

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An extreme high-pressure oil seal test (320 hours, 9,500 to 9,800 psi)

Kalsi Engineering has been performing high pressure oil seal tests directed at increasing the pressure capacity of washpipe assemblies, hydraulic swivels, and similar rotary applications. In a test we completed on May 6, 2019, a pair of 4.500” oil seals were tested at 120 rpm while retaining an ISO 68 viscosity grade oil that was […]

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A new way to address circumferential seal slippage

Circumferential slippage of a seal relative to a housing can produce undesirable effects, such as increased seal and housing temperature and seal and housing wear. Kalsi Seals incorporating anti-rotation tangs (U.S. Patent 8,505,924) haven’t been widely adopted due to the expense of machining matching pockets in the lubricant side groove wall of the seal housing. […]

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Announcing the release of KVAP Version 4.2

Kalsi Engineering is excited to announce the release of Version 4.2 of the Kalsi Valve and Actuator Program (KVAP™) software. KVAP 4.2 is a culmination of a multiyear project to bring key advances to the leading nuclear industry valve and actuator design calculation and tracking and trending software.  The new features include: Refined methodology for […]

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A 1,500 psi test with a 0.020” radial extrusion gap clearance

Our Super Wide™ rotary seals were designed for partitioning oil from drilling fluid in lubricant-overpressure types of equipment such as power swivels, where the lubricant pressure is intended to be slightly higher than the drilling fluid pressure. The dynamic lip of this new seal design is two times wider than our Extra Wide rotary seal […]

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Join us at the 2020 Offshore Technology Conference, May 4 to 7, 2020 (Houston)

Kalsi Engineering invites you to stop by and visit with us at the 2020 Offshore Technology Conference (OTC).  The 2020 show is May 4 to 7 at the NRG Center in Houston, Texas. Rotary Seals – Stop by our booth to meet the engineers who are at the forefront of polymeric high-pressure rotary sealing technology. Learn […]

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Rotary seal testing at 9,400 psi

In previous posts, we described testing a 2.75” rotary seal at 1,890,000 PV for 1,000 hours (7,500 psi at 252 feet/minute) and testing a 4.50” rotary seal test at 9,800 psi and 24 rpm. This post describes a 4.5” rotary seal test that was conducted at 9,400 psi while rotating at 120 rpm (141 feet/minute). […]

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A luncheon honoring retirees Bahir Eldiwany and Daniel Bubela

Kalsi Engineering hosted a luncheon at Fernando’s restaurant on December 17, 2018 to honor Engineer Bahir Eldiwany, PhD, P.E. and Laboratory Technician Daniel Bubela on the occasion of their retirement. Although the years have gone by far too fast, it is indeed an honor to celebrate the impact and legacy of such wonderful colleagues and […]

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