10-6
10. All seat configurations with screw/clip retainers
require a gasket (item No. 55) installed in the
appropriate groove. This is accomplished by press-
ing the gasket into the appropriate groove.
11. If the seat retainer is the screw/clip type and has a
soft or dual seat, press the soft seat into the soft
seat retainer or metal seat. (There should be an
interference between the soft seat and the re-
tainer.) With the valve in the closed position,
secure the retainer or metal seat in place by tight-
ening the retainer clips and screws. This allows the
seat to align with the disc, permitting tight shutoff.
12. If the seat retainer is the screw/clip type with a
metal seat design, a gasket will need to be installed
in the metal seat prior to clipping the seat in place
with the seat clips and screws.
NOTE: Valdisk valves of earlier design may re-
quire that the disc be open while installing the soft
seat into the body. (Refer to Figure 1D.)
13. If an early design Valdisk seat retainer has an
indexing groove to accept a soft seat, press the
corresponding seat into the retainer groove. Install
the seat retainer subassembly into the body.
14. On valves supplied with the retainer snap-ring con-
figuration, install the snap-ring into the groove around
the retainer (or metal seat). Start the retainer into the
Figure 4: Transfer Case Mounting
O
S
S
O
S
S
O
S
S
O
S
S
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
Style A
Fail-closed
Air-to-open
Shaft Upstream
Style B
Fail-open
Air-to-close
Shaft Upstream
Style C
Fail-open
Air-to-close
Shaft Downstream
Style D
Fail-closed
Air-to-open
Shaft Downstream
NOTE: Styles B and D may
require a heavy-duty spring
to achieve failure.
Right-hand Mounting
Facing Downstream
Left-hand Mounting
Facing Downstream
Style C
Style D
Style B
Style A
Left-hand
Mounting
Right-hand
Mounting
NOTE: Orientation 1 is standard. Orientation positions
2 and 4 are not available in some actuator sizes.
Contact factory.
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