Description:

The Model 51-1 Dual Limit Switch provides visual indication of valve
position, as well as remote electrical indication of “valve open” and
“valve closed”. The single pole double throw Micro-Switches can be connected to open or close an electrical circuit when the valve opens or closes.
The adjustable collars are normally set to contact the trip arms
to indicate “valve open” and “valve closed”. The collars can be
positioned on the stem by loosening the set-screws to actuate the
switches at the desired point of valve travel.