Butterfly Valves 1 1/2" to 12" - HAYWARD Industries, Inc. - #2

Text version of the page

NOTE: On valves of the “LUG” design, bolts are recommended. “LUG” design not available on 1 1/2”. OPERATION When installation is complete, check for proper alignment. Fully open and close the valve 3 or 4 times. With a lever installed, fully squeeze the handle and hold in for the full stroke 90º stroke of the lever. For optimum operation the lever handle should be held up until full stroke of valve is reached. The handle should be relaxed only at end of stroke. Maximum operation pressure at ambient temperature is 150 PSI. See Chart Below for pressure in PSI derating at temperature. MAINTENANCE & DISASSEMBLY OF VALVE I. Minimal valve maintenance is required. The valve is field repairable. II. Actuator Assembly: Actuators can be removed and installed without removing valve from the line. The line should be depressurized before any actuator is removed. A. Handle Assembly: remove black logo bezel by lifting with a thin bladed screwdriver of knife. Remove exposed slotted head screw and flat washer. Lift the handle off. B. Gear Actuators: remove four (4) hex nuts and the washers that hold the actuator to the body. C. Pneumatic / Electric Actuator: removed by unscrewing either four (4) socket head cap screws or hex nuts which hold the actuator to the valve. III. VALVE DISASSEMBLY 1. Depressurize and drain line. 2. Remove valve from line and wash thoroughly. 3. For 8” and smaller valves remove cap plug from valve bottom (use a 1/2” drive racket). For 10” and 12” remove wedge from body utilizing a small punch to drive wedge out of body. 4. Remove shaft by pushing down on shaft from top, out through bottom of valve body. Note placement of O-ring around plug removed. 5. Remove upper elastomeric moisture seal. 6. Remove upper bearing or 3 bearings on 10” and 12” valves, (use the shaft to twist out). 7. Remove lower bearing (use the shaft to twist out). 8. To remove seal retainers, place shaft through one seal retainer and approximately 3/4 through the disc. Rotate disc approximately 30º, push shaft through disc against opposite seal retainer. Corner of shaft will push against flats of seal retainer. Remove shaft, and insert from opposite side of disc. Rotate disc approximately 30º and push out remaining seal retainer. 9. Slide disc out of liner. 10. Inspect all parts for wear and replace as required. NOTE: The liner is not a replaceable part of the valve. 11. To reassemble: lightly lubricate all moving parts and seals (using a lubricant such as “Non-Fluid Oil” #666) and reverse above procedure.
BYIS Rev. G 8/18/99 ECR 819R