DeZURIK
3-20” BAW AWWA Butterfly Valves
August 2013
Page 13
D10386
Disassembling Valve
Before disassembly, remove the valve from the pipe line, open the valve and remove actuator (and
adapter, if included) from the valve. See the “REMOVING VALVE” section. See Figures 1 and 2 for
component identification.
Removing the Disc/Shaft from Body
1.
If the valve has packing gland, remove the two screws (A26), and the gland (A25).
2.
Remove the plug (A16) from the bottom of the valve.
3.
Remove the disc-to-shaft assembly:
•
On sizes 3–12", remove the torque plug (A10).
•
On sizes 14–20", remove the set screw (A10) and drive out the pin (A4) from the side opposite the set
screw with a hammer and punch. Do not damage the shaft with the punch.
•
On sizes 18 and 20", also remove the lower set screw (A12).
4.
Remove the shaft from the valve body:
•
On sizes 3–16", push the bottom end of the shaft (A5) and carefully remove the shaft from the top of
the body.
•
On sizes 18 and 20", turn a threaded fastener into the threaded hole on the lower shaft (A11). Using
the threaded fastener, carefully remove the shaft from the body.
5.
Remove the disc (A2) from the side of the body opposite seating side.
Reassembling Valve
1. Block the body (A1) in a horizontal position with the seat facing down.
Note:
Provide clearance for the disc above and below the seat opening.
2. Apply a paint-like coating of an NSF 61 approved lubricant (such as Dow Corning 111 or
Phoenix 505) to the two flat pads near the holes for the shaft.
3. Holding the disc (A2) in a vertical “OPEN” position, with the shaft connection toward the top of
the body, insert the disc into the seat opening in the body and align the shaft holes in the disc
with the shaft holes in the body.
4. Insert the shaft into the body and disc:
•
On sizes 3–16", insert the shaft (A5) into the top of the body, through the disc and into the
bottom of the body. Insert the shaft carefully so that the body bearings (A7 and A32) are not
damaged or moved out of position.
•
On sizes 18 and 20", insert the upper shaft (A5) through the top of the body and into the top
of the disc. Insert the shaft carefully so that the upper body bearing (A7) is not damaged or
moved out of position. Align and center the flat on the shaft with the tapped hole in the disc.
Insert the lower shaft (A11) though the bottom of the body and into the bottom of the disc.
Insert the shaft carefully so that the lower body bearing (A32) is not damaged or moved out
of position. Align and center the hole in the lower shaft with the tapped hole in the disc.