9-5
9-2-2. Disassembly and assembly
(1) Detach the actuator from the valve as described in Section 4.1.
(2) Loosen the packing flange nut.
(3) Loosen the hex nut (1) of the bonnet, using the wrench.
(4) Raise the bonnet and remove the gasket (3).
Note: When raising the bonnet, Press down the stem so that it will not come up together
with the bonnet.
(5) Remove the hex nut (2) which fixes the bellows flange and bellows seat.
Note: When loosening the nut, hold stationary the bellows seat so that no unreasonably
large torsion is applied to the bellows, which is not highly resistant against torsion.
(6) Remove the bellows flange and gasket (4).
Note: The bellows seat can be readily detached by lightly hitting its top. (The most
effective method is to hit it by passing a pipe onto the stem.)
(7) Remove the hex nut (3) which fixes the extension, by using a wrench. Detach the
extension from the valve body.
(8) Remove the gasket (1), guide ring and stem, together.
Note: The stem section has the valve plug, bellows seat, bellows assembly and pin,
assembled together.
(9) Remove the gasket (2).
(10) Holding the valve Plug with a vise or other tool, remove the pin by using a chisel. Detach
the stem from the valve plug by tuning the stem counterclockwise.
Note: To turn the stem, put back the stem connector onto the stem.
For assembly of the control valve, follow the disassembly procedure in the reverse order.
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