Supervisory switch is used to monitor the open position of an OS&Y (Outside Screw and Yoke) gate valve. It contains visual switch indicators, adjustable length trip rod, and accommodates up to 12AWG wire.
It is a 3-position switch. Normal is when the switch is installed on the OS&Y valve, the valve is fully open and the trip rod is in the groove of the valve stem. Closing the valve causes the trip rod to ride up out of the groove and activate the supervisory switch.
Available size
| Switch | Contact ratings | Conduit entrances | Ref. No. |
|---|---|---|---|
| Single switch (One set of SPDT) | 10A at 125/250VAC, 2A at 30VDC Resistive, 10mA min at 24VDC | 2 knockouts for 1/2″ conduit provided | V8210 |
| Double switch (Two sets of SPDT) | 10A at 125/250VAC, 2A at 30VDC Resistive, 10mA min at 24VDC | 2 knockouts for 1/2″ conduit provided | V8220 |
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