Normally Closed Servomotors

Normally Closed Servomotors View Large Image

The Polytherm Actuator is a thermostatic actuator for opening and closing valves on heating ciruit distributiors of concealed floor heating and cooling systems.


  • Compact size, small dimensions.
  • Available in normally closed.
  • Patented 100% protection against leaky valves.
  • All around function indicator.
  • Maintenance-free.
  • Noiseless.
  • High functional safety and long expected service life.
  • Enhanced over-voltage protection.
  • Low power consumption.
  • 360o installation position.
  • Snap-on installation.
  • Valve-adapter concept.
  • Adaptation check on valve.
  • Available in 230v and 24v versions with either 30mm or 28mm valve adapater ring
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