The OSYSU is used to monitor the open position of an OS&Y (outside screw and yoke) type gate valve
This device is available in two models; the OSYSU-1, containing one set of SPDT (Form C) contacts and the OSYSU-2, containing two sets of SPDT (Form C) contacts
These switches mount conveniently to most OS&Y valves ranging in size from 2" to 12" (50mm to 300mm)
Make sure the groove in the valve stem is at least as wide as the OSYSU roller or trip rod and is at least 1/2" deep. If not, use a 3/8" round file on the groove
The OSYSU-EX-O is designed to supervise the position of an Outside Screw & Yoke type gate valve in hazardous outdoor locations. The device mounts on the valve to monitor the rising stem. When properly mounted, the trip rod will be resting in a groove filed into the valve stem. When the valve stem begins to move, caused by closing the valve, the trip rod will be pushed out of the groove and activate the switch. To aid with installation the trip rod length is adjustable. This device features a UL listed explosion proof switch enclosure.
OSYSU-EX (Explosion Proof Outside Screw and Yoke Valve Supervisory Switch)
Description
The Model OSYSU-EX is designed to supervise the open condition of an OS & Y type gate valve in hazardous locations. It features a UL listed explosion proof switch enclosure and an adjustable trip stem.
