Assertion: valve | /r/HasProperty | opened by the magnetic activator device
Facets:
Source sentences:
text: The valve is opened by the magnetic activator device 40 or 41 creating a force field of sufficient strength to move the magnet core 22', and the valve 15 connected thereto, with such force as to overcome the attractive force of the valve seat 16' and retract the valve member 15 to open position.