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Block Valves: Instruction Manual for All Sizes
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11. Ensure that the air cylinder (6) is still in the upside down position, using plastic tweezers
or other nondestructive instrument, pull the quad ring (7) out of the center bore of the
air cylinder (Figure 1-6).
NOTE
When removing the quad ring, care must be taken not to mar
any metal surfaces, especially the groove in which the quad
ring is positioned.
Figure 1-6
Positioning the Quad Ring in the Air Cylinder
NOTE
Further disassembly requires a soft-jaw vise, two 1¼-20 nuts,
and two 7/16 open end wrenches.
12. Remove the spring (9) from the valve stem (8).
13. Position the bellows/valve stem assembly in the vise with the valve stem pointed up and
the seal disc between the jaws. Tighten the vise jaws on the seal disc periphery firmly
but not so tight as to deform the seal disk (Figure 1-7).
Figure 1-7
Removing the Stem from the Seal Disc
14. Thread both nuts to the midpoint of the threaded section of the stem. Using two
wrenches, tighten the two nuts into each other by turning the bottom nut
counterclockwise while simultaneously turning the top nut clockwise (Figure 1-7).
Quad Ring
Piston Cup
Air Cylinder
1/4-20 Nuts
Содержание L6280
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