The SMA-THERMO is externally accessed through electricity and, at its core, consists of a pressure plate with a spring made of a shape-memory alloy, as well as a heating element. The casing is attached via a customary M30x1.5 screw that joins it to the valve.
The valve remains open without electricity after the engine has been mounted (NO-function). After a control voltage has been applied, the shape-memory spring gets heated by the heating element, elongates and shuts the valve seat. When the control voltage is switched off, the spring force of the shape-memory spring decreases again and the valve spring reopens the valve seat.
Fast-switching electro-thermal engines for 2/2-way valves.

•    silent
•    very short closing time
•    long service life