|Solenoid valves sold by HyVac come in two basic types those rated to
29.5" mercury vacuum and those rated for 10-6 Torr which is higher vacuum.
They come in two basic configurations "normally open" and "normally
closed". They all function using electromagnetic power to drive a piston or
diaphragm. A normally open valve is open when no electricity is supplied to the coil. A
normally closed valve is closed when there is no power supplied. Usually the normally
closed valves are used to maintain vacuum in systems and the normally open valves are used
as "vacuum breakers". Because they are electrically actuated, there is no need
for air power and all one needs is electricity. It also means they can be used in
conjunction with programmable logic controllers or digital acquisition systems if
unattended operation is desired.
HyVac has various sized valves for your consideration.
They come standard with a female national pipe thread (NPT) fitting on both sides of the
valve. They come standard at 115V 60 Hz although other electrical configurations are
available including 24VDC, 220V, 380V, 480V coils and 50Hz frequency. Standard is a
regular housing. Optional housing is explosion
proof. Operating Temp. 32-125 Deg F.
All valves outlined below are 115V 60Hz..