Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20Australian Pipeline Valve - Installation, Operation and Maintenance Manual 13 6.2 DISASSEMBLY Single piece body design disassembly as follows. a. Lay down the valve with the disc in the closed position. b. Loosen the taper pin(s) from the valve disc using a punch. The punch should be same size or larger diameter as small end of taper pin to avoid flattening the taper pin. c. Remove taper pin(s) from disc. Remove the valve shaft from the body (using a twisting motion will assist removal). d. Remove the valve disc from body making sure not to damage the disc or seat sealing edge. e. The seat can be removed from either direction by applying even pressure on one face to push the seat out of the body. If the valve is of dead end service design, remove set screws around periphery of body extending into seat prior to seat removal. Some liners also have an elastomer, monolithic or silicon seat backing ring. f. Remove shaft bushings from body as required. Note: Some valve designs use a pinless disc which requires the shaft is first pulled out before disc removal, consult as-built drawing. 2 Piece body design requires that the 2 body sections are first unbolted and then the procedure is similar to 6.2 above. 6.3 ASSEMBLY Reassemble the valve as follows. a. Thoroughly clean all parts. Inspect components for any defects. b. Apply small amount of silicon grease to the inside surfaces of the body, including the lower and upper shaft holes. c. Insert the shaft bushings into the body being careful not to allow intrusion into the body seat bore. d. Install the seat into the centre of the body, making sure the shaft holes in the seat line up with the holes in the body. e. Completely coat the inside surfaces of the seat with silicon grease. Carefully push the disc into the seat in the open position (90 degrees to the body). Line up the shaft holes of the disc as close as possible with the shaft holes in the seat body. f. Insert the shaft through the body and disc, use a twisting motion to align the keyway parallel with the disc. g. Insert taper pin(s) into the disc and set with two or three sharp blows. Wipe dust shield O-ring with silicon grease and place over the shaft into the top of the body. h. If the valve is of dead end service design, insert set screws through the body into the seat. LINED BUTTERFLY VALVES - MODEL 2014 & 2016 SERIES