Put the valve in the half-open position to flush and remove dangerous substances that may exist inside and outside the valve.
Close the ball valve, remove the connecting bolts and nuts on the flanges on both sides, and then completely remove the valve from the line.
Disassemble the drive unit-actuator, connecting bracket, lock washer, stem nut, butterfly shrapnel, Grennan, wear plate and stem packing.
Remove the body cover connecting bolts and nuts, separate the bonnet from the valve body, and remove the bonnet gasket.
Verify that the ball is in the "off" position, which allows it to be easily removed from the valve body and then removed from the seat.
Push the valve stem down from the hole in the valve body until it is completely removed, then remove the O-ring and the stem under the packing.
