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OSYSU-19-2 <br /> p POTTER OUTSIDE SCREW AND YOKE <br /> The Symbol of Protection VALVE SUPERVISORY SWITCH <br /> FIG. 1 SMALL VALVE INSTALLATION-1/2"THRU 2 1/2" SIZES <br /> These switches mount conveniently to most 2"to 12"OS&Yvalves. They will mount on some valves as small as 1/2". J-hooks <br /> may he required on valves with limited clearance. <br /> SLOTTED <br /> MOUNTING <br /> HOLES MAYBE <br /> USED FOR FINE <br /> ADJUSTMENT OF <br /> SWITCH ON <br /> �/ ` 1111. <br /> BRACKET <br /> CLAM P�\ �. <br /> BAR tom / BRACKET <br /> CARRIAGE • <br /> BOLT <br /> r 1 <br /> • <br /> - DWG8 979-3 <br /> SMALL VALVE INSTALLATION <br /> 1. Remove and discard"C"washer and roller from the trip rod. and smooth the edges of the groove to prevent damage to the valve <br /> packing and to allow the trip rod to move easily in and out of the <br /> 2. With the valve in the FULL OPEN position, locate the OSYSU groove as the valve is operated. <br /> across the valve yoke as far as possible from the valve gland, so <br /> that the trip rod lays against the non-threaded portion of the valve 7. Mount the OSYSU with the trip rod centered in groove. <br /> stem. <br /> 8. Final adjustment is made by loosening 2 screws (see Fig. 1) and <br /> 3. Loosen the locking screw that holds the trip rod in place and adjust sliding the OSYSU on the bracket. Adjustment is correct when <br /> the rod length(see Fig.4). When adjusted properly,the rod should switches are not activated with the trip rod seated in the valve stem <br /> extend past the valve screw,but not so far that it contacts the clamp groove and that the switches activate when the trip rod moves out <br /> bar. Tighten the locking screw to hold the trip rod in place. of the groove. <br /> NOTE: If trip rod length is excessive, loosen the locking screw 9. Tighten the adjustment screws and all mounting hardware. Check <br /> and remove the trip rod from the trip lever. Using pliers,break off to insure that the rod moves out of the groove easily and that the <br /> the one(1)inch long notched section(see Fig.5). Reinstall trip rod switches activate within one turn when the valve is operated from <br /> and repeat Step 3 procedure. the FULL OPEN towards the CLOSED position. <br /> 4. Mount the OSYSU loosely with the carriage bolts and clamp bar NOTE: CLOSE THE VALVE FULLY TO DETERMINE THAT THE <br /> supplied. On valves with limited clearance use I-hooks supplied STEMTHREADSDONOTACTIVATETHE SWITCH.THE SWITCH <br /> instead of the carriage bolts and clamp bar to mount the OSYSU. BEING ACTIVATED BY THE STEM THREADS COULD RESULT <br /> IN <br /> 5. Mark the valve stem at the center of the trip rod. A FALSE VALVE OPEN INDICATION. <br /> 6. Remove the OSYSU. File a 1/8"deep groove centered on the mark <br /> on the valve stem utilizing a 3/16" diameter straight file. Round <br /> PRINTED IN USA MFG.#5400979-REV S-1 PAGE 2 OF 4 <br /> 11110 <br />