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<br />@ POTTER <br /> <br />OSYS-B <br />OUTSIDE SCREW AND YOKE <br />VALVE SUPERVISORY SWITCH <br /> <br />FIG. 2 <br /> <br /> <br />t. <br /> <br />..... <br /> <br />~" <br /> <br />"- <br /> <br />" <br /> <br />v' <br /> <br />I <br />/ <br /> <br />~ <br /> <br />4 5/8 <br /> <br />""~, <br /> <br />'~ <br />/ <br />",> <br /> <br />2 112 <br /> <br />----T~READED FOR <br />112" CONDUIT <br /> <br />~" <br /> <br />DWG. #5400518-30 <br /> <br />OSYS-B VALVE INSTAllATION <br /> <br />1. With the valve in the fully open position,locate the model OSYS-B on the <br />valve yoke as far as possible from the valve gland. <br /> <br />2. Mount the model OSYS-B loosely with the 3. J. bolls supplied so that the <br />tripping roller is held perpendicular to the base of the model OSYS-B by <br />the valve stem, <br /> <br />3. Mark the valve stem at the edge of the roller nearest the valve gland, <br />Close the valve 1 1/4 turns of the wheel and mark the stem at the edge <br />of the roller nearest the valve wheel. <br /> <br />4. Remove the switch and file a 118. deep groove between the marks with <br />an S. half round file. Round and smooth the edge of the groove to <br />prevent damage to the valve packing and to allow the roller to move <br />easily out of the groove. <br /> <br />5. Open the valve fully and mount OSYS-B loosely with roller centered in <br />groove and perpendicular to base. <br /> <br />6. Final adjustment is made by positioning OSYS-B where switch will <br />activate when moving out of groove and deactivate when moving back <br />into groove with equal overtravel in each direction. <br /> <br />7. Tighten the mounting nuls and dose the valve 2 turns to see that the <br />roller moves out of the groove easily and activates the switch. <br /> <br />NOTE: CLOSE THE VALVE FULLY TO DETERMINE THAT THE STEM <br />THREADS DO NOT ACTIVATE THE SWITCH. THE SWITCH BEING <br />ACTIVATED BY THE STEM THREADS COULD RESULT IN A FALSE <br />VALVE OPEN INDICATION. <br /> <br />When properly installed. removing the model OSYS-B from the valve will <br />also activate the switch, <br /> <br />FIG. 3 <br /> <br />VALVE <br />WHEEL <br /> <br /> <br />'J'BOLT <br />3 REQ.'D <br /> <br />YOkE <br />GLAND <br /> <br />c::>> <br /> <br />DWG. #5400518-31 <br /> <br />BULLETIN 518 PAGE 2 OF 2 <br /> <br />PRINTED IN USA <br />