Flowserve Valtek Valdisk Control Valves - Manual (Page 6)

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10. All seat configurations with screw/clip retainers require
a gasket (item #55) installed in the appropriate groove.
This is accomplished by pressing the gasket into the ap-
propriate 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 retainer.) With the valve in the closed
position, secure the retainer or metal seat in place by
tightening 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 require 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 subas-
sembly into the body.
14. On valves supplied with the retainer snap-ring configu-
ration, install the snap-ring into the groove around the
retainer (or metal seat). Start the retainer into the body
with the open ends of the snap-ring in the body groove.
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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