Text version of the page

REPAIR:
IF THERE IS A SHEAR PIN AND COUNTER WEIGHT THE SHEAR PIN MUST BE REMOVED TO REMOVE THE CLAPPER. Remove the complete valve body from the piping system. If the valve seat is damaged due to solids or erosion the valve does not necessarily have to be replaced. A new seat seal surface can be obtained by reversing the clapper in the body. Remove the bolts, nuts and washers that hold the body together. Carefully remove all solids from the body halves. Remove the snap rings from both the pivot shafts. Carefully push the shafts out of the valve body. Check all O-rings for damage and replace if damaged. Reassemble the valve with the clapper on the undamaged seat side. The snap rings are required to maintain the shafts in the correct position. Install the body bolts with flat washers. A flat washer, lock washer and nut must be installed on the opposite body half. Carefully peal the label from the valve and apply it to the opposite body half. Reinstall the valve in the line. The clapper must open in the direction of intended flow . Clapper retainer O-ring Counterweight (Optional Swing Arm Shear Pin (Optional) Pivot pin Body Bolt Washers Lock Washer and Nut

FLOW →→→→

Seal Surface, Seat Clapper Snap Ring Drain Plug Clapper Seal O-ring or soft gasket Body O-Ring

Swing Check Valves - 16511 SWING CHECK CUT-A-WAY VIEW

OPERATING PRESSURE vs TEMPERATURE OPERATING PRESSURE vs. TEMPERATURE

3” and 4” SWING CHECK 6” and 8” SWING CHECK

SWIS REV F 9/14/99 ECR 819R