What's New

March 2018

It’s not new but our installation list for Sulzer (ABS) HST blowers is continuing to grow! We just recently received the letter of intent to supply three HST 9500 blowers for the Greeley, Colorado WRF. We are excited to have Greeley as our most recent customer and look forward to the successful completion of the project.

ABS BlowerFor those not familiar, the Sulzer blower is a magnetic bearing design which has been very successful. The blower was created in Finland by HST with the first installation placed in 1996 in an aeration application at an industrial facility. Our blower is designed to operate in aeration applications, it was not adapted from any other technology. From 1996 to today, aeration is the only application for our blower. The inventors originally studied magnetic bearings and eventually ran across blower applications. They realized what a boon it would be to use magnetic bearings for blowers. There were two big benefits to be had. First would be elimination of noise. In the late 90’s multi-stage centrifugal blowers were commonly used in aeration applications. Although quieter than positive displacement blowers, they still produced enough noise that hearing protection was absolutely mandatory. If you have a Sulzer-ABS HST blower, you can stand immediately next to a 400 HP unit and hold a conversation in a normal tone of voice.

The second big benefit is the fact blowers can be turned on and off at will without any wear or damage to the blower. Aeration applications have peak periods during any given day. The ability to adjust air flow by adding or subtracting a blower is critical. With mag bearing blowers, the blower can be turned off as the rotating assembly will remain in the levitated state as long as there is power to the bearing system. The power consumed by the blower in this state is equivalent to the power consumed by two, 100-watt light bulbs in a 24 hour period. There is no need to “idle” a blower which will consume additional power unnecessarily.

Additional benefits of the mag bearing system are the ability to monitor the position of the rotating assembly during operation. HST blowers may operate from 15,000 to 25,000 RPM. At these speeds having something go wrong with no warning system can cause major problems in less than a heartbeat. Unless added to the system as a special, air bearing units have no such protection. Mag bearing units have multiple sensors at both the top and the bottom of the shaft that check it thousands of times per second. Any reading outside of pre-set parameters will cause a unit to shut down. The mag bearing system is also provided with a UPS system to maintain the bearings in a levitated state even upon immediate and complete loss of drive power. The rotating assembly is allowed to decelerate prior to being allowed to land.

Old multi-stage centrifugals required the services of a trained millwright to perform coupling alignment. Although they operated at less than 3600 RPM, improper alignment could ruin bearings quickly and cause a re-build of the entire unit. Sulzer-ABS HST units require no alignment services. The mag bearing system assures everything is in proper alignment anytime the system is operated.

Multi-stage centrifugals also required either grease or oil bearing lubrication. HST units require no such lubrication and with the exception of changing filters as required by the unit, have very little maintenance associated with them.

We would like to thank our existing customers in Bozeman and Butte, Montana, Pueblo, Broomfield, Louisville, and Windsor, Colorado as well as the Upper Thompson Sanitation District in Estes Park and the Air Force Academy in Colorado Springs. We appreciate your confidence in us and our equipment.

If you are considering a blower upgrade or complete replacement, we would appreciate the opportunity to speak with you considering our blowers.

Please browse our site and let us know how we can be of service.