Hunt Valve Company, Inc.
Salem, OH USA
+1-330-337-9535
Hunt Valve Company, Inc.
Salem, OH USA
+1-330-337-9535
Today, with the desire for more energy efficient operations, some customers have installed variable speed drives on their large descale system centrifugal pumps to substantially reduce their power demands. Available power savings can be over $1 million per year for the mill. However, this technology produces new transient forces within the piping system creating excessive fatigue failure problems in the piping and hydraulic components of the entire descale system. Increased maintenance expense is substantial and must be evaluated and accounted for properly.
After extensive analysis within all practical means, it was evident the excessive fatigue loading could not be engineered away from the system. The Hunt solution for our products was then to redesign the valves to withstand this excessive fatigue loading, to give the valves the extended life necessary without increasing the risk of operational downtime to the customer. Today, Hunt valves with upgrade options are completely suitable for variable speed drive descale systems.
A customer had a number of descale valves within their system. Some of the descale valves are with 90° right flange orientation and others are 90° left flange orientation. The customer needs spares on hand suitable for both locations. The solution was a simple fix of supplying valve housings with both 90° right and left outlet flange orientations.
A customer was required to replace his original pump pressure breakdown orifice due to repeated failures. The fabrication had been designed to fit in a 9-foot long flange-to-flange location. The new Hunt replacement orifice would only require a 5-foot length. Rather than make piping changes or require a separate spool piece, the Hunt design was modified to be a 9-foot drop in replacement length for a quick, simple, and economical installation.
One customer had a problem with a rotary joint in need of great repair. The rotary joint was being used constantly five days a week and downtime was not an option. Hunt evaluated the rotary joint on site and purchased all necessary replacement parts ahead. The unit was removed Friday evening and sent direct to Hunt. After two days of around the clock remanufacturing, it was returned for re-installation Sunday evening. The rotary joint was back in full service without a minute of downtime to the customer.
