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Applications
 
 
 
 
 
 
Safety function, mechanical monitoring of switch position
 
 
Requirement:

The remit from a customer in the power plant industry was to develop a hydraulic valve that indicates with absolute certainty whether the valve plunger is seated in the desired switch position (turbine switched on or off).


Herion solution:

In-house design based on a standard NG10 directional control valve. The plunger in the valve has been lengthened and actuates a limit switch directly via a switching cam. Plunger and switching cam form a unit so that all switch positions can be monitored reliably and safely.


Customer benefits:


  • Minimum control complexity

  • Fast response times

  • Absolutely definite confirmation of position by mechanical parts

  • Inexpensive to manufacture thanks to modular design


Note: these valves can also be used in redundant systems
 
 
 
 
 
 
Requirement:

To project, develop and manufacture a specific hydraulic unit for the high-pressure control of Kaplan turbines providing a maximum of efficiency and safety in a hydroelectric power plant.


Herion solution:

Development of a completely new hydraulic power unit comprising oil container, hydraulic pumps, control valves (servo valves, proportional and shut-off valve) as well as sensors, the whole especially designed to the customer’s specifications.


Customer benefits:


  • Improved control response times

  • Electronically controlled switching valves for improved safety

  • Compact and space-saving design

  • Perfect addition of the customer’s and HERION’s competencies


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