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CI^YTON PRESSURE REDUCING VALVE No. 90 OPERATING INSTRUCTIONS -ADJUSTING SCREW ?CONTROL The valve has been set at the factory to operate satisfactorily under normal line conditions. No adjustments should be necessary to put the valve in service after installation. If the discharge pressure was not specified on the order, the valve is set at 60 pounds. To adjust the discharge pressure, turn the adjusting screw on the control clockwise to raise the pressure, or counterclockwise to lower the pressure. SERVICE NOTES Should the main valve open or close too rapidly, the needle valve (X) should be partially closed. CAUTION: NEVER CLOSE NEEDLE VALVE (X) COMPLETELY! If the valve does not open readily to maintain the desired discharge pressure, the needle valve (Y) should be closed slightly by turning clockwise. The proper setting for needle valve (Y) is 'A to % of a turn off the seat. This may be checked by turning the needle clockwise to its seat momentarily and then backing off the proper amount. It is seldom necessary to close valve (Y) to less than % turn off the seat. CAUTION: NEVER CLOSE NEEDLE VALVE (Y) COMPLETELY! Strainer should be cleaned at regular intervals. CLAYTON WARRANTY Clayton Valves are guaranteed, for one year from date of shipment, against manufacturing defects in materials and workmanship which develop in the service for which they are recommended. We will sustain no claims for damages or charges for labor or expense in making repairs or adjustments. Our liability is limited to material replacements F.O.B. Alhambra, California.