Lo-Rez presents advanced methods for torsional vibration analysis of reciprocating compressors driven by inductions motors


In conjunction with Beta Machinery Analysis, Lo-Rez has developed specific design methods to account for the magnetic field effects in an induction motor driving a reciprocating compressor. Presented in two papers given at GMRC 2013 and 2014, the effect can be very large in some cases, raising the torsional natural frequency into the compressor operating speed range. The second paper provides a way to estimate the resulting stator current pulsations. Contact Ed Hauptmann ( for further information or a copy of the papers. Early field data indicates good comparison between theory and measurement as shown.


New Lo-Rez Coupling-Damper

               The Lo-Rez steel-spring coupling is now available with an optional viscous damper integral with the coupling cover. The damper is available with a range of damper constants, sized to provide optimum damping for any particular driveline. Contact Richard Hordyk (lo-rez@lo-rez) for further information.

The Jack and St Malo fields, located 700 miles offshore, will be developed by a massive floating semi-submersible production facility, which will be installed at a depth of 7,000ft. Its topsides will weigh 33,000t and the facility will have a capacity of 170,000bopd and 42.5mmscf per day of natural gas. Lo-Rez has supplied couplings for 2750 HP reciprocating compressors on the Jack and St Malo production platform. Commissioning is currently underway. Photo shows the platform being towed into location earlier this year.                         


2012 International WorkBoat Show, New Orleans, Dec. 5-7.

2012 International WorkBoat Show, New Orleans, Dec. 5-7.Lo-Rez will be at the WorkBoat Show in New Orleans once again. Please come by our booth #223 to learn how the Lo-Rez Soft Mount package, in place in more than 350 marine applications around the world, provides up to 97% vibration isolation efficiency with noise levels of 62-70dBA.

GMRC 2012, Austin, Sept.30-Oct.3.

GMRC 2012, Austin, Sept.30-Oct.3.Thanks to our many customers and friends for stopping by our booth at the recent GMRC in Austin. The show is always a great success, and we look forward to seeing you again next year in Albuquerque, Oct 6-9, 2013!

Soft Mount Sytems for newest CCG Vessels

Soft Mount Sytems for newest CCG VesselsThe Canadian Coast Guard will have the Lo-Rez Soft Mount isolation system installed on its new 22m and 25m Inshore Science Vessels. Designed by Robert Allan Ltd. and now under construction at Meridien Maritime Inc., the vessels are powered by twin Cat C18′s through a Twin Disc gearbox. They will see service on the Atlantic Coast. Image courtesy of Robert Allan Ltd.

Lo-Rez at OTC Houston

Lo-Rez at OTC HoustonThanks to all our customers and friends for stopping by our booth at the Offshore Technology Conference in Houston, May 2-6, 2011. The show attracted over 75,000 visitors, with 2,500 companies exhibiting their products. Our booth featured a life-size photo of a Lo-Rez steel spring coupling between an Ariel JGK/4 compressor and a 1750 HP GE motor operating at 1200 RPM. See you next year!

10,000 HP, hydrogen service coupling shipped to Indonesia.

10,000 HP, hydrogen service coupling shipped to Indonesia.The latest ‘M’-size Lo-Rez coupling has been shipped to Indonesia for hydrogen compression service. Richard Hordyk, Production Manager, is shown next to the coupling, which is rated for 2 million lb-in torque at 300 RPM. The coupling is approximately 74 in. diameter and has a total weight of 8,500 lbs. This is the fourth such coupling in service at this location.

Largest luxury yacht from Turkish yard chooses Soft Mount System.

Largest luxury yacht from Turkish yard chooses Soft Mount System.Proteksan-Turquoise Yachts in Turkey has continued the practise of installing the Lo-Rez Soft Mount System for superior vibration isolation and noise control. This is the largest Lo-Rez installation at this yard to date. NB54, the 72.4 m yacht shown is powered by twin Caterpillar units as was the earlier NB 53 vessel described in a previous Lo-Rez news release.