Azionatore di tipo elettrotermico per valvole di zona e per unità terminali accoppiabile con valvole Siemens serie VGZ a 2 vie, XGZ a tre vie e XGZ+TXZ 3 vie 4 attacchi.
È costituito da un elemento termostatico ad espansione (PTC) che, una volta ricevuto il comando a 230 Vac, provoca la fuoriuscita di un pistoncino e spinge verso il basso lo stelo della valvola, il tutto vincendo la molla di contrasto del corpo valvola stesso.
L’attuatore è realizzato con doppio isolamento termico, coperchio di chiusura in plastica e manopola di comando manuale per operatività senza alimentazione.
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