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Case Study

Proportional Control Valve

In steel mills, persistent water hammer in high-pressure piping systems often leads to burst pipes, cracked welds and descale header damage. Hunt Valve and RSI worked together to develop a servo controlled proportional poppet descale valve which can be programmed to eliminate water hammer in the system. Hunt Valve brings nearly 100 years of fluid power engineering innovations and solutions to a wide range of industrial and military customers.



Company Name: Hunt Valve

Date: March, 2017





Services Provided by RSI

Hardware Selection – RSI assisted with the selection of the servo system including the motor, drive, and roller screw actuator to achieve the required forces to actuate the high pressure valve within the application budget.

Control Panel Design – RSI designed and assembled the control panel which houses the servo control system in a dirty, wet, and hot environment. Special precautions were taken to insure the control system could operate in the harsh environment.

Application Software and HMI Development – RSI developed an intuitive user interface; enabling maintenance staff to setup a valve profile and quickly test to eliminate water hammer. The application is windows based so it can run on any windows tablet, or laptop making it easier to identify and resolve problems with minimal downtime.
The application we developed logs relevant data to an online server for remote diagnostics and data analytics. The data is analyzed alongside other installed valves to determine if a valve is in need of maintenance.

User Interface

Control Tab

Allows operators to see the current state of the valve and allow them to take control manually if needed.

Profiles Tab

Allows operators create a custom motion profile which slows down towards the end of the move to eliminate water hammer.

Analytics Tab

Allows operators to see the current state of the valve and allow them to take control manually if needed.

Settings Tab

Allows operators to modify a couple of the valve settings.

Solution Technologies

  • RSI Custom Designed RapidValve HMI
  • sRMP EtherCAT Motion Controller
  • Servo Motor
  • EtherCAT Servo Drive
  • High Force Roller Screw Actuator

Customer Benefits

  • Reduced Operating costs.
  • 3-5x Extended service life due to less wear and tear on piping systems.
  • Intuitive HMI for quick setup and remote monitoring.
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