FAQ

|Process Valves

What is the difference between the N.C. and N.O. valve types in the VX2 series catalog? In addition, what exactly are body materials Al and C37?

N.C. valves open when energized, and N.O. valves close when energized. As for the body materials, Al is aluminum alloy and C37 is brass.
A video demonstrating normally closed ON/normally open OFF can be found here.
A video demonstrating normally closed OFF/normally open OFF can be found here.
And a video demonstrating normally closed OFF/normally open ON can be foundhere.